Engine

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Automotive Engine, Internal Combustion Engine (ICE) and Petro Engine

Definition

An internal combustion engine (ICE) is a heat engine in which the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working fluid flow circuit. In an internal combustion engine, the expansion of the high-temperature and high-pressure gases produced by combustion applies direct force to some component of the engine. The force is applied typically to pistons, turbine blades, rotor or a nozzle. This force moves the component over a distance, transforming chemical energy into useful work.

The first commercially successful internal combustion engine was created by Étienne Lenoir around 1860 and the first modern internal combustion engine was created in 1876 by Nikolaus Otto (see Otto engine).

The term internal combustion engine usually refers to an engine in which combustion is intermittent, such as the more familiar four-stroke and two-stroke piston engines, along with variants, such as the six-stroke piston engine and the Wankel rotary engine. A second class of internal combustion engines use continuous combustion: gas turbines, jet engines and most rocket engines, each of which are internal combustion engines on the same principle as previously described. Firearms are also a form of internal combustion engine.

In contrast, in external combustion engines, such as steam or Stirling engines, energy is delivered to a working fluid not consisting of, mixed with, or contaminated by combustion products. Working fluids can be air, hot water, pressurized water or even liquid sodium, heated in a boiler. ICEs are usually powered by energy-dense fuels such as gasoline or diesel fuel, liquids derived from fossil fuels. While there are many stationary applications, most ICEs are used in mobile applications and are the dominant power supply for vehicles such as cars, aircraft, and boats.

Typically an ICE is fed with fossil fuels like natural gas or petroleum products such as gasoline, diesel fuel or fuel oil. There is a growing usage of renewable fuels like [[biodiesel] for CI (compression ignition) engines and bioethanol or methanol for SI (spark ignition) engines. Hydrogen is sometimes used, and can be obtained from either fossil fuels or renewable energy.

History

In the early years, steam engines and electric motors were tried, but with limited success. In the 20th century, the internal combustion (ic) engine became dominant. In 2020, the internal combustion engine remains the most widely used but a resurgence of electricity seems likely because of increasing concern about ic engine exhaust gas emissions.

As of 2020, the majority of the cars in the United States are gasoline powered. In the early 1900s, the internal combustion engines faced competition from steam and electric engines. The internal combustion engines of the time was powered by gasoline. Internal combustion engines function with the concept of a piston being pushed by the pressure of a certain explosion. This explosion is burning the hydrocarbon within the cylinder head an engine. Out of all the cars manufactured during the time, only around one fourth are actually considered internal combustion. Within the next couple of years, the internal combustion engine came out to become the most popular automotive engine. Sometime within the 19th century, Rudolf Diesel invented a new form of internal combustion power, using a concept of injecting liquid fuel into air heated solely by compression. This is the predecessor to the modern diesel engine used in automobiles, but more specifically, heavy duty vehicles such as semi-trucks.

Internal combustion engines

Petrol engines quickly became the choice of manufacturers and consumers alike. Despite the rough start, noisy and dirty engine, and the difficult gear shifting, new technologies such as the production line and the advancement of the engine allowed the standard production of the gas automobiles. This is the start, from the invention of the gas automobile in 1876, to the beginning of mass production in the 1890s. Henry Ford's Model T drove down the price of cars to a more affordable price. At the same time, Charles Kettering invented an electric starter, allowing the car to be more efficient than the mechanical starter. The abundance of fuel propelled gas automobiles to be the highly capable and affordable. The demand of gasoline rose from 3 billion barrels in 1919 to around 15 billion in 1929.

An internal combustion engine is a motor that is powered by the expansion of gas which is created by the combustion of hydrocarbon gases fuels. To elaborate, an internal combustion used the heat of a combustion created by the injected hydrocarbon fuel to create mechanical motion. At the time of the early 1900s, wood alcohol was a popular fuel for French and German automobiles, but as governments imposed large taxes on the production, the price of wood alcohol rose above that of gasoline. Gasoline engines became popular as a result of this, as internal combustion engines were commonly known as gasoline engines. Although gasoline engines became popular, they were not particularly desirable due to the dangers of fuel leaks that may cause explosions. Therefore, many inventors attempted to create a kerosene burning engine as a result. This was not a successful venture applying it for automotive usage. There are many different types of fuels for internal combustion engines. These include diesel, gasoline, and ethanol.

Also See

• Cylinder Heads

Mopar Engines

Wedge Big Block

The Chrysler B and RB engines are a series of big-block V8 gasoline engines introduced in 1958 to replace the Chrysler FirePower (first generation Hemi) engines. The B and RB engines are often referred to as "wedge" engines because they use wedge-shaped combustion chambers; this differentiates them from Chrysler's 426 Hemi big block engines that are typically referred to as "Hemi" or "426 Hemi" due to their hemispherical shaped combustion chambers.

Design features of the B and RB engines include 17 capscrews per cylinder head, a cylinder block that extends 3 in (76.2 mm) below the crankshaft centerline, an intake manifold not exposed to crankcase oil on the underside, stamped-steel shaft-mounted rocker arms (race versions used forged steel rockers), and a front-mounted external oil pump driven by the camshaft.

The 'B' series wedge engine was introduced in 1958 with 350 cu in (5.7 L) and 361 cu in (5.9 L) versions. The 361 would continue in production until the end of the series, albeit only for truck installation. The RB ("raised B") arrived one year after the launch of the B series engines, in 383 cu in (6.3 L) and 413 cu in (6.8 L) displacements. Unlike the previous B-engines, which had a 3 3⁄8-inch (85.7 mm) stroke, the RB engines had a 3 3⁄4-inch (95.3 mm) stroke.

For 1960, a "ram induction" system increased the 413's torque up to 495 lb⋅ft (671 N⋅m) on the Chrysler 300F versions.

The last 'B-RB' wedge-headed engine was produced in August 1978, ending the era of Chrysler "big-block" engines.

B-Engine

350

The 350 cu in (5.7 L) B engine was, along with the 361, the first production B engine, first available in 1958. It had a bore of 4.06 in (103 mm). The 350 is classified as a big block engine. All parts except for the pistons are fully compatible with the 361.

Vehicles using the B 350:

• 1958 DeSoto Firesweep
• 1958 Dodge
• 1958 Plymouth Fury

361

The 361 cu in B engine also introduced in 1958 was essentially the same as the 350 except with a larger 4 1⁄8-inch (104.8 mm) bore, for an actual displacement of 360.83 cu in (5,913 cc). In 1962, the Dodge Polara 500 came standard with a 305 bhp (227 kW) version of the 361 that had a four-barrel carburetor, dual-point distributor, and dual exhausts. Plymouth called their versions of the early B engine the Commando, variants of which included the Golden Commando and Sonoramic Commando. It produced 305 bhp (227 kW). DeSoto's B engine was named Turboflash and produced 295 bhp (220 kW). The Dodge standard version was a 2-barrel with 295 bhp (220 kW) called the Super Red Ram with an optional variant that was called the D500 and produced 320 bhp (239 kW).

The 361 would last until the end of the series, albeit for trucks only. In its early years, the 305-horsepower 361 was optional on many vehicles, and standard on, among others, the Dodge 880. The 361 had a fuel injected version in 1958 only.[1] Very few of the fuel injected B engines were made and only a handful remain, since most were brought back to the dealer to be fitted with carburetors.

383

The 383 cu in B engine — not to be confused with the RB version — was essentially a larger bore version of the 350 and 361, using a 4.25 in (108.0 mm) bore for a 383.03 cu in (6,277 cc) displacement. This venerable engine was introduced in 1959. Dodge's version, the D500 had a cross-ram induction manifold and dual 4-barrel carburetors as options. In some Dodge applications, this engine was labeled as the Magnum, while the Plymouth's version was called the Golden Commando. Both came with a dual point distributor in high-performance versions.

The 383 became the standard model Mopar performance engine for the next decade. The big bore allowed for larger 2.08 in (53 mm) intake valves, and the relatively short stroke helped it to be a free-revving engine, as well as a free-breathing one.

Producing a maximum of 330 hp (246 kW; 335 PS) (gross) and 460 lb⋅ft (624 N⋅m) of torque for the 1960 model year, the 383 beat the 392 Hemi that had reached 435 lb⋅ft (590 N⋅m). The 1960 383 engines featured the same basic ram induction system as the Chrysler 300F's 413 RB engines (named Sonoramic Commando when sold in Plymouth form). The later 383 Magnum (starting in 1968) used the 440 Magnum heads, camshaft, and exhaust manifolds. This engine was advertised at 335 hp (250 kW; 340 PS).

400

The 400 cu in (6.6 L) B engine was introduced in 1972 to replace the venerable 383, and were power-rated via the net (installed) method. Chrysler increased the bore size of the 383 to create the 400. Its bore of 4.342-inch (110.3 mm) was the largest used in any production Chrysler V8 at the date of its introduction. All parts except for the pistons were interchangeable between the 383 and 400.

Crankshafts were of cast iron composition. Three versions of this engine were available: a two-barrel/single exhaust version producing 170 hp (127 kW; 172 PS) at 4,400 rpm with 305 lb⋅ft (414 N⋅m) of torque at 2,400 rpm, a four-barrel/single exhaust version producing 205 hp (153 kW; 208 PS) at 4,400 rpm, and a high performance four-barrel/dual exhaust version rated at 260 hp (194 kW; 264 PS) at 4,800 rpm, 410 lb⋅ft (556 N⋅m) of torque at 3,200 rpm. All three versions used the same 8.2:1 compression ratio. The 400 was used in car, truck, and motorhome chassis. Horsepower and torque ratings gradually declined through the years due to the addition of more federally mandated emissions controls, until all Chrysler passenger vehicle big-block production ceased in 1978. For its last year of production, it only produced 190 hp (142 kW) (although a heavy-duty version was also available).

Due to its large factory bore size, short (compared to RB engines) deck height, and bottom end strength that is greater than any other production B or RB engine due to extra material added around the main bearing caps, 400 B engine blocks have become a popular choice for high-performance engine build ups.

RB-Engine

The RB engines, produced from 1959 to 1979, are Raised-Block (taller) versions of the B engines. All RB engines have a 3 3⁄4 in (95.3 mm) stroke, with the bore being the defining factor in engine size. All RB wedge engines share a deck height of 10.725 in (272.4 mm), and were fitted with 6.768 in (171.9 mm) long connecting rods, resulting in a 1.80:1 rod ratio. Bore center distance is 4.8 in (120 mm). All RBs are oversquare.

383

Not to be confused with the 383 B engine, the 383 RB had a 4 1⁄32-inch (102.4 mm) bore (with the long stroke of 3 3⁄4-inch (95.3 mm)) for a displacement of 383 cu in (6.3 L). It was only available in 1959 and 1960 on the US-built Chrysler Windsors and Saratogas; one of Trenton Engine's lines had been converted to the new RB engine (to make the 413), and demand for the 383 B engine was too high for the remaining line. The solution was to create a 383 RB to fill the gap until the plant figured out how to quickly switch from one block to the other.

413

Not to be confused with the 383 B engine, the 383 RB had a 4 1⁄32-inch (102.4 mm) bore (with the long stroke of 3 3⁄4-inch (95.3 mm)) for a displacement of 383 cu in (6.3 L). It was only available in 1959 and 1960 on the US-built Chrysler Windsors and Saratogas; one of Trenton Engine's lines had been converted to the new RB engine (to make the 413), and demand for the 383 B engine was too high for the remaining line. The solution was to create a 383 RB to fill the gap until the plant figured out how to quickly switch from one block to the other.

Engine specifications

Model years	Fuel system	Power	Torque	Compression ratio
1959–1961	4-Barrel Carburetor	Template:Documentation subpage Template:Hatnote {{#ifeq:Engine|Template:Convert|Template:High-risk}} Template:Transwiki guide Template:Lua Template Template:Tl calculates from one measurement unit to another one, and then presents the results formatted. The complete list of unit symbols recognized by the template is at Module:Convert/documentation/conversion data. For example: {{convert|2|km|mi}} → (km entered, so converted into mile) {{convert|7|mi|km}} → (mi entered, so converted into km) Numbers can be rounded, units can be abbreviated into symbols: {{convert|2|km|mi|2|abbr=on}} → {{convert|7|mi|km|2|abbr=on}} → Value ranges can be entered using |to|... or |-|...: {{convert|2|to|5|km|mi}} → {{convert|2|-|5|km|mi}} → Combined effect example: {{convert|2|-|5|km|mi|2|abbr=on}} → {{convert|2|and|5|km|mi|sigfig=3|abbr=off}} → Units to convert Template:Hatnote Enter units to convert from into: {{convert|1|lb|kg}} → SI units generally accept prefixes, like "m" for milli (10−3), and "M" for mega (106) For "per" units, use "/" (slash): kg/ha For three-unit units, etc., see Template:Cl Unit name or symbol (abbreviation): 1 pound or 1 lb? By default, the first quantity shows the unit name, the second shows the symbol (or abbreviation): {{convert|1|lb|kg}} → Using Template:Para is the reverse behaviour to the default: {{convert|1|lb|kg|abbr=in}} → To abbreviate both or neither: {{convert|1|lb|kg|abbr=on}} → {{convert|1|lb|kg|abbr=off}} → Convenience: Template:Tlf has Template:Para by default Template Template:Tl is the same as Template:Tlf, except that it has Template:Para as the default behaviour. In Template:Tlf, all other options are available. So: {{cvt|1|lb|kg}} → Template:Cvt is equivalent to: {{convert|1|lb|kg|abbr=on}} → Template:Cvt Adjective: a 10-mile distance Use Template:Para to produce the adjectival (hyphenated) form: A {{convert|10|mi|km|adj=on}} distance → A distance. Default behaviour, for comparison: {{convert|10|mi|km}} to go → to go. Template:Para does not produce hyphens with unit symbols, as per Manual of Style: A {{convert|9|in|cm|adj=on|abbr=on}} nail → A nail. Template:AnchorRounding: 100 ft is 30 m or 30.5 m or 30.48 m? Template:Hatnote By definition, 100 ft equals . In practical use, it is common to round the calculated metric number. With that, there are several possibilities. Default rounding By Template:Tlf default, the conversion result will be rounded either to precision comparable to that of the input value (the number of digits after the decimal point—or the negative of the number of non-significant zeroes before the point—is increased by one if the conversion is a multiplication by a number between 0.02 and 0.2, remains the same if the factor is between 0.2 and 2, is decreased by 1 if it is between 2 and 20, and so on) or to two significant digits, whichever is more precise. An exception to this is rounding temperatures (see below). Examples of rounding Input Displays as Note {{convert|123|ft|m|-1}} {{convert|123|ft|m}} same output as with 0 (below) {{convert|123|ft|m|0}} {{convert|123|ft|m|1}} {{convert|123|ft|m|2}} The more-exact value is 37.4904 m or so, which gets converted to 37 m if this parameter is not specified at all. {{convert|500|ft|m|-1}} {{convert|500|ft|m}} same output as with −1 (above), because the conversion factor is between 0.2 and 2 (hence, it should produce same double-zero precision (−2) as in the input value), but the conversion must produce two significant digits at a minimum (hence, a higher single-zero precision (−1) is used) {{convert|500|ft|m|0}} {{convert|500|ft|m|1}} {{convert|500|ft|m|2}} exact value is 152.4 m {{convert|500|ft|cm|-3}} {{convert|500|ft|cm}} same output as with −3 (above), because the conversion factor is between 20 and 200 (hence, it should decrease input value's double-zero precision (−2) by 2), but the conversion must produce two significant digits at a minimum (hence, a higher triple-zero precision (−3) is used) {{convert|500|ft|cm|0}} Convert supports four types of rounding: Round to a given precision: use a precision number Specify the desired precision with the fourth unnamed parameter (or third unnamed parameter if the "convert to" parameter is omitted; or fifth unnamed parameter if a range is specified; or fourth unnamed parameter again if a range is specified and the "convert to" parameter is omitted; needs to be replaced with a "precision" named parameter). The conversion is rounded off to the nearest multiple of Template:Frac to the power of this number. For instance, if the result is 8621 and the round number is "-2", the result will be 8600. If the result is "234.0283043" and the round number is "0", the result will be 234. Round to a given number of significant figures: Template:Para To specify the output number to be with n significant figures use Template:Para: {{convert|1200|ft|m|sigfig=4}} → {{convert|1200|ft|m|sigfig=3}} → {{convert|1200|ft|m|sigfig=2}} → {{convert|1200|ft|m|sigfig=1}} → Default behaviour, for comparison: {{convert|1200|ft|m}} → Setting Template:Para to a value less than 1 is meaningless: {{convert|1200|ft|m|sigfig=0}} → Template:Nay Round to a multiple of 5: 15, 20, 25, ... Using Template:Para rounds the outcome to a multiple of 5. {{convert|10|m|ft}} → {{convert|10|m|ft|round=5}} → Similar: using Template:Para rounds the outcome to a multiple of 25. {{convert|10|m|ft}} → {{convert|10|m|ft|round=25}} → Default behaviour, for comparison: {{convert|10|m|ft|sigfig=4}} → In a range, one can round each value individually to the default. Use Template:Para: {{convert|10 x 200 x 3000|m|ft}} → {{convert|10 x 200 x 3000|m|ft|round=each}} → Round to a multiple of a given fraction: Template:Frac inch Specify the desired denominator using Template:Para. (Denominator is the below-the-slash number, for example the 3 in Template:Frac). {{convert|5.56|cm|in|frac=16}} → {{convert|8|cm|in|frac=4}} → The fraction is reduced when possible: {{convert|8|cm|in|frac=100}} → Default behaviour uses decimal notation: {{convert|5.56|cm|in}} → Template:AnchorRounding temperatures: °C, °F and K In temperatures, the conversion will be rounded either to the precision comparable to that of the input value or to that which would give three significant figures when expressed in kelvins, whichever is more precise. {{#invoke:DemoTemplate|convert|10,000|C|F K}} {{#invoke:DemoTemplate|convert|10,000.1|C|F K}} {{#invoke:DemoTemplate|convert|-272|C|F K}} {{#invoke:DemoTemplate|convert|-272|C}} {{#invoke:DemoTemplate|convert|100|C|F K}} {{#invoke:DemoTemplate|convert|0|C|F K}} The precision of the input number in example (1) is one digit, but the precision of its Kelvins expression is three, so the precision of the Fahrenheit conversion is made three (made 180...) . (1) and (2) seem to belie the fact that a , and make the 32 degrees difference shown in (1) begin to seem off somehow. Result (1) seems off until you set the significant figures yourself with Template:Para: {{#invoke:DemoTemplate|convert|10000|C|sigfig=5}} or you set the precision positionally, relative to the decimal point (zero being at the decimal point): {{#invoke:DemoTemplate|convert|10000|C|0}} The precision of the input number in example (2) is six, so the precision of the Fahrenheit output is, whereas before, Kelvins had determined it to be three. Examples (3) and (4) show how this can be hidden and generate questions, but it occurs there because the Kelvins conversion generated two fractional parts. (Before it was the input number that generated the fractional part.) In example (3) the three input digits converted into five significant output digits because of the two digits after the decimal point, generated by the Kelvins conversion. This happened again in (5), but in (6) decimal fractions were neither given as input nor induced by the Kelvins conversion. Rounding input There is limited support for rounding the displayed input number. The rounding takes place after conversion, so the output is based on the full-precision input. This is useful when the input is produced by Template:Tlc or otherwise available to a higher precision than is usefully displayed, and it's desirable to avoid double-rounding. To round the input to a specified number of digits after the decimal point, use one of the parameters: Template:Para Template:Para Template:Para Template:Para Note that there is no Template:ParaTemplate:Nay or similar for rounding above the decimal place. Neither is there support for significant figures, multiples of 5, or any other output-rounding feature. The default precision is computed based on the input, so an explicit output precision must usually be supplied: Template:Tlc → Template:Nay (precisions are mismatched) Template:Tlc → Template:Aye In this case, if the input were rounded before conversion, a different result would be obtained: Template:Tlc → Template:Nay (double rounding) Into multiple units: Separate the multiple output units by a space: {{convert|10|C|F K}} → {{convert|5|km|mi nmi}} → If the output unit names contain spaces, use + as the separator. See also: For multiple-unit options like 1 ft 5 in, see Template:Section link and Template:Section link. Ranges of values Template:For A range converts two values and separates them by your choice of words and punctuation. A range: 6 to 17 kg (13 to 37 lb) Range indicators are entered as the second parameter (between the values). Range separators can be: Template:Convert/doc/range separator list Multiple dimensions: Use by: {{convert|6|by|12|ft|m}} → Use ×, multiplication sign, or x, letter: {{convert|6|x|12|m|ft}} → In science, the formal way is to set |x| and Template:Para (keeping dimensions right, like in area = x km2): {{convert|6|x|12|m|ft|abbr=on}} → Lists of values: 20, 40, or 60 miles {{convert|20|,|40|, or|60|mi}} → About feet, inch in ranges and multiples While it is possible to enter feet, inch in a simple conversion, this is not possible for ranges: {{convert|1|ft|3|in|x|3|ft|5|in|mm}} → Template:Nay Default behaviour, for comparison: {{convert|1|ft|3|in|mm}} → However, converting metric units into feet and inches with Template:Para can produce the desired output: {{convert|380|x|1040|mm|ftin|order=flip}} → Words Spelling of unit name: international metre or US meter? Default spelling of units is in the en (generic) locale. To show en-US spelling, use Template:Para: {{convert|1|m|ft}} → —default {{convert|1|m|ft|sp=us}} → Spell out numbers: ten miles To write a number in words, use Template:Para: {{convert|10|mi|m|spell=in}} → To spell out both in and out values, use Template:Para: {{convert|10|mi|m|spell=on}} → To make first letter a capital, use Template:Para, Template:Para {{convert|10|mi|m|spell=In}} → {{convert|10|mi|m|spell=On}} → Remember that the spelling of the units (ft, m) is independently set by Template:Para. To the extreme: {{convert|10|mi|m|spell=on|abbr=off|sp=us}} → Inserted before units: 4 planted acres {{convert|4|acre||adj=pre|planted}} → disp=preunit is similar, but has no separator after the specified text, and can have different text for the output value: {{convert|4|acre||disp=preunit|planted }} → {{convert|4|acre||disp=preunit|planted |reforested-}} → After adjective unit: A corridor Note that two units (in this case, ft and m) are required. Use with just one unit will generate an error message. {{convert|10|ft|m|adj=mid|-long}} → Plurals: 1 inch, 2 inches The unit symbol is singular always. Depending on the preceding number only, a unit name can be shown plural. {{convert|1|metre}} → {{convert|2|metre}} → {{convert|2|metre|abbr=on}} → Exception Entering the unit spelled |foot| forces singular output "foot", whatever the number is. {{convert|100|foot|abbr=off}} → Fractions: one-eighth of an imperial pint The convert template also supports spelling out fractions. {{convert|3+1/2|oz|g|spell=in}} → Any additional words needed for the fraction can also be added at the end of the template. {{convert|1/8|imppt|ml|spell=in|adj=pre|of an}} → Wrapping and line breaking See Template:Section link Spelling out "thousands", "millions", etc. Most unit codes accept a prefix of e3 (thousand) or e6 (million) or e9 (billion). {{convert|100|e6mi|e6km}} → {{convert|120|e6acre}} → {{convert|120|e6acre|e3km2}} → To display both input and output in scientific notation, use Template:Para {{convert|100|e6mi|e6km|abbr=on}} → To spell out "thousands", "millions", etc., Template:Para abbreviates the unit; Template:Para displays both full unit names. {{convert|100|e6mi|e6km|abbr=unit}} → {{convert|100|e6mi|e6km|abbr=off}} → Numbers Using an SI prefix: gigametre (Gm), or micrometre (μm) Template:Sidebar metric prefixes (small) Units can have an SI prefix like G before the unit: Gm, and giga before the name: gigametre. These are plain multiplication factors. To illustrate, these are trivial calculations (from metre to metre), showing the multiplication factor: The prefix can be added before the SI unit (here: unit m for metre): {{convert|12|Gm|mi|abbr=on}} → Mm: km: mm: μm: um: (letter "u" can be used for "μ" here) The prefix can be used in the output unit: {{convert|12000|mi|Mm|abbr=on}} → {{convert|12|in|μm|abbr=on}} → As an exception, the non-SI unit "inch" can have the "μ" prefix too: {{convert|12|μm|μin|abbr=on}} → Engineering notation: 7 × 106 m In the unit: e6m Engineering notation can be entered as a "prefix" to the unit: {{convert|70|e6m}} → The same is possible for the output unit: {{convert|23,000,000|ft|e6m}} → Any standard unit (not a combination, multiple, or built-in unit) can have such a prefix: e3 (thousand), e6 (million), e9 (billion), e12 (trillion), e15 (quadrillion). Scientific notation: 1.23 × 10−14 In scientific notation, a number is written like Template:Rnd. The plain number has exactly one digit before the decimal point. With Template:Tlf, the input can be in e-notation such as 12.3e4. This value is displayed as a power of ten, and the output is displayed in scientific notation, except that an output value satisfying 0.01 <= v < 1000 is shown as a normal number. In addition, if the output value is 1000 and sigfig=4 is used, the value is displayed as a normal number. {{convert|12.3e-15|atm|atm|abbr=on}} → {{convert|0.00000005|atm|atm|abbr=on}} → Input with fractions: The number to convert can be written in fractions. Both / (keyboard slash) and ⁄ (fraction slash) are accepted: {{convert|1/2|in|mm|1}} → {{convert|1⁄2|in|mm|1}} → With positive mixed numbers (a positive integer and a fraction), use a + sign {{convert|2+1⁄2|in|mm|1}} → With negative mixed numbers, use a hyphen - and repeat it: {{convert|-2-1⁄2|in|mm|1}} → Note that the following cases are not interpreted as mixed numbers: {{convert|2-1⁄2|in|mm|1}} → . This is interpreted as a range from 2 inches to 1⁄2 inch. {{convert|-2+1⁄2|in|mm|1}} → Template:Nay This is neither a mixed number nor a range, and mathematical expressions requiring calculations are not allowed here. Horizontal fraction bar: Template:Sfrac inch Using a double slash (//) provides a horizontal fraction bar for the original (input) unit: {{convert|1//2|in|mm|1}} → {{convert|6+3//8|in|mm|1}} → Using a negative value for Template:Para provides a horizontal fraction bar for the converted (output) unit: {{convert|12.7|mm|frac=-2}} → {{convert|161.9|mm|frac=-8}} → Thousands separator: 1,000 mi or 1000 mi In input, a comma for thousands separator is accepted but not required; a gap (space) is not accepted. In output, by default, the thousand separator is the comma: {{convert|1234567|m|ft}} → {{convert|1,234,567|m|ft}} → Set Template:Para to remove the separator from the output: {{convert|1234567|m|ft|comma=off}} → Use Template:Para to use digit grouping by gap (thin space) as a thousands separator: {{convert|1234567|m|ft|comma=gaps}} → Default behaviour, for comparison: {{convert|1234567|m|ft}} → Setting Template:Para will only add the separator when the number of digits is 5 or more: {{convert|1234|m|ft|comma=5}} → {{convert|1234567|m|ft|comma=5}} → Default behaviour, for comparison: {{convert|1234|m|ft}} → Output manipulation Brackets and separators: 10 m [33 ft] Punctuation that distinguishes the two measurements is set by Template:Para. Options are: b (the default), sqbr, comma, or, br, x|…: {{convert|10|m|ft|disp=sqbr}} → {{convert|10|m|ft|disp=comma}} → {{convert|10|m|ft|disp=or}} → Default behaviour, for comparison: {{convert|10|m|ft}} → Setting Template:Para will force a new line (<br/>) {{convert|10|m|ft|disp=br}} → Also Template:Para will force a new line, and keep the brackets (useful in tables): {{convert|10|m|ft|disp=br()}} → Setting Template:Para allows any text as separator: {{convert|10|m|ft|disp=x|_MyText_}} → (To display spaces, use &nbsp;) Flipping (reordering) the two measurements: Setting Template:Para will flip (swap) the two measurements: {{convert|1|mi|m|order=flip}} → Default behaviour, for comparison: {{convert|1|mi|m}} → When converting to multiple units, the effect is: {{convert|10|km|mi nmi|order=flip}} → {{convert|10|km|nmi mi|order=flip}} → Fixed ordering of output units: Setting Template:Para shows the output-units as ordered; the input unit is skipped: {{convert|100|C|F C K|abbr=on|order=out}} → {{convert|200|PS|kW hp|0|abbr=on|order=out}} → See also: § Displaying parts of the output. Displaying parts of the result: It is possible to display only parts of the conversion result: Convert Output Returns {{convert|2|cuyd|m3}} Regular output (for comparison) {{convert|2|cuyd|m3|abbr=values}} Input and output numbers {{convert|2|cuyd|m3|disp=unit}} Input unit {{convert|2|cuyd|m3|disp=unit|adj=on}} Input unit, adjective (hyphenated) {{convert|2|cuyd|cuyd|disp=out}} Input (workaround. Template:Nowrap) {{convert|2|cuyd|m3|abbr=~}} Input: both name and symbol {{convert|2|cuyd|m3|disp=unit2}} Output unit (symbol) {{convert|2|cuyd|m3|disp=unit2|abbr=off}} Output unit (name) {{convert|2|cuyd|m3|disp=number}} Output value {{convert|2|cuyd|m3|disp=out}} Output value and unit name {{convert|2|cuyd|m3|disp=out|abbr=off}} Output value and unit symbol Display both input name and symbol: 2 kilopascals [kPa] Setting Template:Para returns both name and symbol of the first (input) unit: {{convert|2|kPa|psi|abbr=~}} → A {{convert|2|kPa|psi|abbr=~|adj=on}} pressure → Template:Nowrap Table options For the wikitable structure, there are three options: add a line-break, split the result over columns and make the table sortable. Enforced line break Template:Para adds a line-break and omits brackets. Template:Para adds a line-break and does add brackets to the converted value. This may be useful in tables: Template:Para Template:Para Table columns Using {convert} in a table cell, with Template:Para splits the result over two (or more) columns. By default units are not included in the table, however, they can be added using the Template:Para parameter. Multiple-unit outputs, like ftin, always output their units to the table. {{convert|10|m|ft|disp=table}} → Template:Para does the same, and also centers the text: {{convert|20|m|ft|disp=tablecen}} → The units are added as a column header:   kilograms pounds stone and pounds Template:Para Template:Para and Template:Para Template:Para and Template:Para Template:Para Template:Para (default) Sorting Use Template:Para to include a hidden numerical sortkey in the output, suitable for use in a table with sortable columns. Technically, this places a hidden string before the actual displayed values: {{convert|10|m|ft|sortable=on}} Template:Nowrap showing: . Use both Template:Para and Template:Para together to produce table columns (pipe symbols) for each value in sortable columns: m ft A B C D The generated sortkey is calculated in a consistent way based on both the value and its unit as passed to the convert template. In most cases convert uses the passed value converted to SI base units. It is therefore not necessarily the displayed value or other alternate units and is calculated regardless of output format options. Using different units or different order of units in individual rows should therefore not lead to incorrect sorting, although variations in rounding can give surprising results, since an unrounded number is used for the sortkey. Units The conversion factors and physical constants are sourced here. All units Template:Anchor'per' units: kg/hl, miles per gallon When using a slash (/), a unit like kg/hl is recognized as kilograms per hectolitre and will be converted with other mass/volume units. {{convert|1000|kg/hl}} → Population density (inhabitants per square mile) can be converted using {{convert|10|PD/sqmi|PD/km2}} → Vehicular fuel efficiency, commonly expressed in miles per gallon or litres per 100 km can also be converted {{convert|26|mpgUS|l/100km mpgimp}} → Template:AnchorUnits of difference: Expressing a change or difference in temperature We have already discussed standard temperature conversions (°C, °F, K), as shown in these two examples: {{#invoke:DemoTemplate|convert|10|C}} (standard temperature conversion) {{#invoke:DemoTemplate|convert|10–15|C}} (standard temperature range conversion) When expressing a temperature change (e.g., "The temperature increased by 10 °C"), or when comparing temperatures (e.g., "10 to 15 °C warmer"), we cannot use the standard temperature units (Template:Para, Template:Para and Template:Para), which refer to points on the respective scale. Instead, we must use one of the following "units of difference": Template:Para, Template:Para and Template:Para. Compare the following two examples with the two above: {{#invoke:DemoTemplate|convert|10|C-change}} increase in temperature {{#invoke:DemoTemplate|convert|10–15|C-change}} warmer than normal To produce multiple units in the output: {{#invoke:DemoTemplate|convert|10|C-change|F-change K-change}} difference Multiple units: 1 ft 5 in In input Base document Template:Slink lists options for multiple unit input (like ft,in). It can catch predefined sets only (units that can be subdivided; e.g., yd into ft): {{convert|1|yd|2|ft|3|in}} → {{convert|2|ft|3|in|cm}} → {{convert|1|lb|5|oz|g}} → In output Available multiple-unit output options predefined, like ftin and ydftin. The full list is at Template:Slink. {{convert|2|m|ftin}} → {{convert|2|m|ft in}} → , using a space, returns the decimal point Default behaviour, for comparison: {{convert|2|m}} → See also: Template:Tl a length used to measure horses Template:Tl a weight in ton, cwt, qr and lb Currency per unit: $/mi → $/km Using currency symbols in a $ per unit value, you can convert the per-unit: {{convert|10|$/mi|$/km}} → {{convert|1500|$/ozt|$/g}} → You can set the currency in both values using Template:Para: {{convert|10|$/mi|$/km|$=€}} → It is not possible to convert the currency. So, this result (mixed currencies) is not possible: Template:!mxt Template:Nay Using convert inside templates For usage in template code, like infoboxes, Template:Tlf has these options: Pre-formatting fraction input Module:Convert/helper can read regular input and pre-format it into Template:Tlf-accepted input. Your template can accept Template:Para and use {{#invoke:Convert/helper|number|16 7/8}} → {{#invoke:Convert/helper|number|16 7/8}} Using a Wikidata property Adding the Wikidata property code, like code Template:Para, to your template code automatically returns the Wikidata property for that article, and convert it. Both number and unit are read. Note: to return that property value for an other article, use Template:Para. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) {{convert|input=P2073|qid=Q1056131|ftin|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on|disp=out}} → For example see template:Infobox Telescope. Sometimes a property may have more than one value against it in Wikidata. You can use the Template:Para parameter to specify which of the values you want to use. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) Template:Wikidata entity link: {{convert|input=P2386|qual=Q613628|ft|abbr=on}} → Template:Wikidata entity link: {{convert|input=P2386|qual=Q1395645|ft|abbr=on}} → Parameter list Deprecated options TemplateData <templatedata> { "description": "Converts measurements to other units.", "params": { "1": { "label": "Value", "description": "The value to convert.", "type": "number", "required": true }, "2": { "label": "From unit", "description": "The unit for the provided value.", "type": "string", "example": "km", "required": true }, "3": { "label": "To units", "description": "The units to convert into. Separate units by a space for multiple outputs. In an output unit, use + for a multiplication space.", "type": "string", "example": "mi nmi", "suggested": true }, "4": { "label": "Precision or suffix", "description": "Significant digits after decimal dot or, if negative, exponent of ten.", "type": "number" }, "lk": { "label": "Link units", "description": "Indication of what units to apply wikilinks to. Use “on” for all, “in” for the input unit, “out” for the output units, or “off” for none of the units.", "default": "off", "type": "string", "example": "on" }, "abbr": { "label": "Abbreviation", "description": "Display for the units: “on” to display all units using their unit symbols, “off” to display all units in full words, “in” to display the unit symbol for the input unit, “out” to display the unit symbols for the output units, “unit” to display unit symbols for both input and output units when using scientific notation, “values” for no units at all (neither unit symbols nor full words of units).", "default": "out", "type": "string", "example": "on, unit, in, out, off", "suggested": true }, "sp": { "label": "Spelling", "description": "Spelling of units. Use “us” to display unit names using U.S. spelling.", "type": "string", "example": "us" }, "adj": { "label": "Adjective", "description": "Whether to use adjectival form. Use “on” for singular unit name appended by a hyphen, “mid” to put conversion at end, or “off” (default) for no adjectival form.", "type": "unbalanced-wikitext", "example": "on", "default": "off" }, "disp": { "label": "Conversion", "description": "Display conversion result: “or”: after ‘or’, “x”: with custom prefix and suffix, “b”: in parentheses, “table”/“tablecen”, “output only”: alone, “output number only”: alone and without unit, “unit”: not at all but input unit; if the value is a number it is used as precision.", "type": "string", "example": "b" }, "order": { "label": "Ordering", "description": "“flip” returns converted value first, input value second.", "type": "string", "example": "flip" }, "sigfig": { "label": "Significant figures", "description": "Indicates the number of significant figures to be used in rounding.", "type": "number" }, "round": { "label": "Rounding output", "description": "The type of rounding. “5” rounds the output number to nearest multiple of 5, “25” to nearest multiple of 25, “each” rounds each number in a range.", "type": "number" }, "comma": { "label": "Thousands separator", "description": "Sets or suppresses the use of thousands separators in the numbers. “off”: no separator; “gaps”: use space instead of comma as thousands separator; “5”: only add thousands separator when the integral part of the number uses 5 positions or more (10,000 or more; if using comma as thousands separator, 1234 would produce '1234', 12345 would produce '12,345').", "default": "on", "type": "string", "example": "off" }, "sortable": { "label": "Sort key", "description": "“on” generates a hidden sort key", "type": "string", "example": "on" }, "spell": { "label": "Spell numbers?", "description": "If used, spells input or input and output numbers in words, optionally capitalizing the first", "example": "'in', 'In', 'on', or 'On'", "type": "string" }, "sing": { "type": "string", "deprecated": "use adj=", "label": "Singular?", "description": "If 'yes', uses singular form of units (deprecated)", "example": "yes" }, "frac": { "label": "Fraction?", "description": "fraction as rounding unit", "type": "number" }, "$": { "label": "Currency symbol", "description": "sets currency symbol in both units", "example": "$=€ will show \" €10 per mile (€6.2/km)\"", "type": "string" }, "input": { "label": "WD property", "description": "Reads the property value of the item (article), then converts it", "example": " (P2046=area)", "type": "string" } }, "format": "inline" } </templatedata> See also Template:Temp Template:Temp Template:Temp to convert historical prices to their current equivalent. Template:Convert navs Template:Sandbox other at 4600 rpm	Template:Documentation subpage Template:Hatnote {{#ifeq:Engine|Template:Convert|Template:High-risk}} Template:Transwiki guide Template:Lua Template Template:Tl calculates from one measurement unit to another one, and then presents the results formatted. The complete list of unit symbols recognized by the template is at Module:Convert/documentation/conversion data. For example: {{convert|2|km|mi}} → (km entered, so converted into mile) {{convert|7|mi|km}} → (mi entered, so converted into km) Numbers can be rounded, units can be abbreviated into symbols: {{convert|2|km|mi|2|abbr=on}} → {{convert|7|mi|km|2|abbr=on}} → Value ranges can be entered using |to|... or |-|...: {{convert|2|to|5|km|mi}} → {{convert|2|-|5|km|mi}} → Combined effect example: {{convert|2|-|5|km|mi|2|abbr=on}} → {{convert|2|and|5|km|mi|sigfig=3|abbr=off}} → Units to convert Template:Hatnote Enter units to convert from into: {{convert|1|lb|kg}} → SI units generally accept prefixes, like "m" for milli (10−3), and "M" for mega (106) For "per" units, use "/" (slash): kg/ha For three-unit units, etc., see Template:Cl Unit name or symbol (abbreviation): 1 pound or 1 lb? By default, the first quantity shows the unit name, the second shows the symbol (or abbreviation): {{convert|1|lb|kg}} → Using Template:Para is the reverse behaviour to the default: {{convert|1|lb|kg|abbr=in}} → To abbreviate both or neither: {{convert|1|lb|kg|abbr=on}} → {{convert|1|lb|kg|abbr=off}} → Convenience: Template:Tlf has Template:Para by default Template Template:Tl is the same as Template:Tlf, except that it has Template:Para as the default behaviour. In Template:Tlf, all other options are available. So: {{cvt|1|lb|kg}} → Template:Cvt is equivalent to: {{convert|1|lb|kg|abbr=on}} → Template:Cvt Adjective: a 10-mile distance Use Template:Para to produce the adjectival (hyphenated) form: A {{convert|10|mi|km|adj=on}} distance → A distance. Default behaviour, for comparison: {{convert|10|mi|km}} to go → to go. Template:Para does not produce hyphens with unit symbols, as per Manual of Style: A {{convert|9|in|cm|adj=on|abbr=on}} nail → A nail. Template:AnchorRounding: 100 ft is 30 m or 30.5 m or 30.48 m? Template:Hatnote By definition, 100 ft equals . In practical use, it is common to round the calculated metric number. With that, there are several possibilities. Default rounding By Template:Tlf default, the conversion result will be rounded either to precision comparable to that of the input value (the number of digits after the decimal point—or the negative of the number of non-significant zeroes before the point—is increased by one if the conversion is a multiplication by a number between 0.02 and 0.2, remains the same if the factor is between 0.2 and 2, is decreased by 1 if it is between 2 and 20, and so on) or to two significant digits, whichever is more precise. An exception to this is rounding temperatures (see below). Examples of rounding Input Displays as Note {{convert|123|ft|m|-1}} {{convert|123|ft|m}} same output as with 0 (below) {{convert|123|ft|m|0}} {{convert|123|ft|m|1}} {{convert|123|ft|m|2}} The more-exact value is 37.4904 m or so, which gets converted to 37 m if this parameter is not specified at all. {{convert|500|ft|m|-1}} {{convert|500|ft|m}} same output as with −1 (above), because the conversion factor is between 0.2 and 2 (hence, it should produce same double-zero precision (−2) as in the input value), but the conversion must produce two significant digits at a minimum (hence, a higher single-zero precision (−1) is used) {{convert|500|ft|m|0}} {{convert|500|ft|m|1}} {{convert|500|ft|m|2}} exact value is 152.4 m {{convert|500|ft|cm|-3}} {{convert|500|ft|cm}} same output as with −3 (above), because the conversion factor is between 20 and 200 (hence, it should decrease input value's double-zero precision (−2) by 2), but the conversion must produce two significant digits at a minimum (hence, a higher triple-zero precision (−3) is used) {{convert|500|ft|cm|0}} Convert supports four types of rounding: Round to a given precision: use a precision number Specify the desired precision with the fourth unnamed parameter (or third unnamed parameter if the "convert to" parameter is omitted; or fifth unnamed parameter if a range is specified; or fourth unnamed parameter again if a range is specified and the "convert to" parameter is omitted; needs to be replaced with a "precision" named parameter). The conversion is rounded off to the nearest multiple of Template:Frac to the power of this number. For instance, if the result is 8621 and the round number is "-2", the result will be 8600. If the result is "234.0283043" and the round number is "0", the result will be 234. Round to a given number of significant figures: Template:Para To specify the output number to be with n significant figures use Template:Para: {{convert|1200|ft|m|sigfig=4}} → {{convert|1200|ft|m|sigfig=3}} → {{convert|1200|ft|m|sigfig=2}} → {{convert|1200|ft|m|sigfig=1}} → Default behaviour, for comparison: {{convert|1200|ft|m}} → Setting Template:Para to a value less than 1 is meaningless: {{convert|1200|ft|m|sigfig=0}} → Template:Nay Round to a multiple of 5: 15, 20, 25, ... Using Template:Para rounds the outcome to a multiple of 5. {{convert|10|m|ft}} → {{convert|10|m|ft|round=5}} → Similar: using Template:Para rounds the outcome to a multiple of 25. {{convert|10|m|ft}} → {{convert|10|m|ft|round=25}} → Default behaviour, for comparison: {{convert|10|m|ft|sigfig=4}} → In a range, one can round each value individually to the default. Use Template:Para: {{convert|10 x 200 x 3000|m|ft}} → {{convert|10 x 200 x 3000|m|ft|round=each}} → Round to a multiple of a given fraction: Template:Frac inch Specify the desired denominator using Template:Para. (Denominator is the below-the-slash number, for example the 3 in Template:Frac). {{convert|5.56|cm|in|frac=16}} → {{convert|8|cm|in|frac=4}} → The fraction is reduced when possible: {{convert|8|cm|in|frac=100}} → Default behaviour uses decimal notation: {{convert|5.56|cm|in}} → Template:AnchorRounding temperatures: °C, °F and K In temperatures, the conversion will be rounded either to the precision comparable to that of the input value or to that which would give three significant figures when expressed in kelvins, whichever is more precise. {{#invoke:DemoTemplate|convert|10,000|C|F K}} {{#invoke:DemoTemplate|convert|10,000.1|C|F K}} {{#invoke:DemoTemplate|convert|-272|C|F K}} {{#invoke:DemoTemplate|convert|-272|C}} {{#invoke:DemoTemplate|convert|100|C|F K}} {{#invoke:DemoTemplate|convert|0|C|F K}} The precision of the input number in example (1) is one digit, but the precision of its Kelvins expression is three, so the precision of the Fahrenheit conversion is made three (made 180...) . (1) and (2) seem to belie the fact that a , and make the 32 degrees difference shown in (1) begin to seem off somehow. Result (1) seems off until you set the significant figures yourself with Template:Para: {{#invoke:DemoTemplate|convert|10000|C|sigfig=5}} or you set the precision positionally, relative to the decimal point (zero being at the decimal point): {{#invoke:DemoTemplate|convert|10000|C|0}} The precision of the input number in example (2) is six, so the precision of the Fahrenheit output is, whereas before, Kelvins had determined it to be three. Examples (3) and (4) show how this can be hidden and generate questions, but it occurs there because the Kelvins conversion generated two fractional parts. (Before it was the input number that generated the fractional part.) In example (3) the three input digits converted into five significant output digits because of the two digits after the decimal point, generated by the Kelvins conversion. This happened again in (5), but in (6) decimal fractions were neither given as input nor induced by the Kelvins conversion. Rounding input There is limited support for rounding the displayed input number. The rounding takes place after conversion, so the output is based on the full-precision input. This is useful when the input is produced by Template:Tlc or otherwise available to a higher precision than is usefully displayed, and it's desirable to avoid double-rounding. To round the input to a specified number of digits after the decimal point, use one of the parameters: Template:Para Template:Para Template:Para Template:Para Note that there is no Template:ParaTemplate:Nay or similar for rounding above the decimal place. Neither is there support for significant figures, multiples of 5, or any other output-rounding feature. The default precision is computed based on the input, so an explicit output precision must usually be supplied: Template:Tlc → Template:Nay (precisions are mismatched) Template:Tlc → Template:Aye In this case, if the input were rounded before conversion, a different result would be obtained: Template:Tlc → Template:Nay (double rounding) Into multiple units: Separate the multiple output units by a space: {{convert|10|C|F K}} → {{convert|5|km|mi nmi}} → If the output unit names contain spaces, use + as the separator. See also: For multiple-unit options like 1 ft 5 in, see Template:Section link and Template:Section link. Ranges of values Template:For A range converts two values and separates them by your choice of words and punctuation. A range: 6 to 17 kg (13 to 37 lb) Range indicators are entered as the second parameter (between the values). Range separators can be: Template:Convert/doc/range separator list Multiple dimensions: Use by: {{convert|6|by|12|ft|m}} → Use ×, multiplication sign, or x, letter: {{convert|6|x|12|m|ft}} → In science, the formal way is to set |x| and Template:Para (keeping dimensions right, like in area = x km2): {{convert|6|x|12|m|ft|abbr=on}} → Lists of values: 20, 40, or 60 miles {{convert|20|,|40|, or|60|mi}} → About feet, inch in ranges and multiples While it is possible to enter feet, inch in a simple conversion, this is not possible for ranges: {{convert|1|ft|3|in|x|3|ft|5|in|mm}} → Template:Nay Default behaviour, for comparison: {{convert|1|ft|3|in|mm}} → However, converting metric units into feet and inches with Template:Para can produce the desired output: {{convert|380|x|1040|mm|ftin|order=flip}} → Words Spelling of unit name: international metre or US meter? Default spelling of units is in the en (generic) locale. To show en-US spelling, use Template:Para: {{convert|1|m|ft}} → —default {{convert|1|m|ft|sp=us}} → Spell out numbers: ten miles To write a number in words, use Template:Para: {{convert|10|mi|m|spell=in}} → To spell out both in and out values, use Template:Para: {{convert|10|mi|m|spell=on}} → To make first letter a capital, use Template:Para, Template:Para {{convert|10|mi|m|spell=In}} → {{convert|10|mi|m|spell=On}} → Remember that the spelling of the units (ft, m) is independently set by Template:Para. To the extreme: {{convert|10|mi|m|spell=on|abbr=off|sp=us}} → Inserted before units: 4 planted acres {{convert|4|acre||adj=pre|planted}} → disp=preunit is similar, but has no separator after the specified text, and can have different text for the output value: {{convert|4|acre||disp=preunit|planted }} → {{convert|4|acre||disp=preunit|planted |reforested-}} → After adjective unit: A corridor Note that two units (in this case, ft and m) are required. Use with just one unit will generate an error message. {{convert|10|ft|m|adj=mid|-long}} → Plurals: 1 inch, 2 inches The unit symbol is singular always. Depending on the preceding number only, a unit name can be shown plural. {{convert|1|metre}} → {{convert|2|metre}} → {{convert|2|metre|abbr=on}} → Exception Entering the unit spelled |foot| forces singular output "foot", whatever the number is. {{convert|100|foot|abbr=off}} → Fractions: one-eighth of an imperial pint The convert template also supports spelling out fractions. {{convert|3+1/2|oz|g|spell=in}} → Any additional words needed for the fraction can also be added at the end of the template. {{convert|1/8|imppt|ml|spell=in|adj=pre|of an}} → Wrapping and line breaking See Template:Section link Spelling out "thousands", "millions", etc. Most unit codes accept a prefix of e3 (thousand) or e6 (million) or e9 (billion). {{convert|100|e6mi|e6km}} → {{convert|120|e6acre}} → {{convert|120|e6acre|e3km2}} → To display both input and output in scientific notation, use Template:Para {{convert|100|e6mi|e6km|abbr=on}} → To spell out "thousands", "millions", etc., Template:Para abbreviates the unit; Template:Para displays both full unit names. {{convert|100|e6mi|e6km|abbr=unit}} → {{convert|100|e6mi|e6km|abbr=off}} → Numbers Using an SI prefix: gigametre (Gm), or micrometre (μm) Template:Sidebar metric prefixes (small) Units can have an SI prefix like G before the unit: Gm, and giga before the name: gigametre. These are plain multiplication factors. To illustrate, these are trivial calculations (from metre to metre), showing the multiplication factor: The prefix can be added before the SI unit (here: unit m for metre): {{convert|12|Gm|mi|abbr=on}} → Mm: km: mm: μm: um: (letter "u" can be used for "μ" here) The prefix can be used in the output unit: {{convert|12000|mi|Mm|abbr=on}} → {{convert|12|in|μm|abbr=on}} → As an exception, the non-SI unit "inch" can have the "μ" prefix too: {{convert|12|μm|μin|abbr=on}} → Engineering notation: 7 × 106 m In the unit: e6m Engineering notation can be entered as a "prefix" to the unit: {{convert|70|e6m}} → The same is possible for the output unit: {{convert|23,000,000|ft|e6m}} → Any standard unit (not a combination, multiple, or built-in unit) can have such a prefix: e3 (thousand), e6 (million), e9 (billion), e12 (trillion), e15 (quadrillion). Scientific notation: 1.23 × 10−14 In scientific notation, a number is written like Template:Rnd. The plain number has exactly one digit before the decimal point. With Template:Tlf, the input can be in e-notation such as 12.3e4. This value is displayed as a power of ten, and the output is displayed in scientific notation, except that an output value satisfying 0.01 <= v < 1000 is shown as a normal number. In addition, if the output value is 1000 and sigfig=4 is used, the value is displayed as a normal number. {{convert|12.3e-15|atm|atm|abbr=on}} → {{convert|0.00000005|atm|atm|abbr=on}} → Input with fractions: The number to convert can be written in fractions. Both / (keyboard slash) and ⁄ (fraction slash) are accepted: {{convert|1/2|in|mm|1}} → {{convert|1⁄2|in|mm|1}} → With positive mixed numbers (a positive integer and a fraction), use a + sign {{convert|2+1⁄2|in|mm|1}} → With negative mixed numbers, use a hyphen - and repeat it: {{convert|-2-1⁄2|in|mm|1}} → Note that the following cases are not interpreted as mixed numbers: {{convert|2-1⁄2|in|mm|1}} → . This is interpreted as a range from 2 inches to 1⁄2 inch. {{convert|-2+1⁄2|in|mm|1}} → Template:Nay This is neither a mixed number nor a range, and mathematical expressions requiring calculations are not allowed here. Horizontal fraction bar: Template:Sfrac inch Using a double slash (//) provides a horizontal fraction bar for the original (input) unit: {{convert|1//2|in|mm|1}} → {{convert|6+3//8|in|mm|1}} → Using a negative value for Template:Para provides a horizontal fraction bar for the converted (output) unit: {{convert|12.7|mm|frac=-2}} → {{convert|161.9|mm|frac=-8}} → Thousands separator: 1,000 mi or 1000 mi In input, a comma for thousands separator is accepted but not required; a gap (space) is not accepted. In output, by default, the thousand separator is the comma: {{convert|1234567|m|ft}} → {{convert|1,234,567|m|ft}} → Set Template:Para to remove the separator from the output: {{convert|1234567|m|ft|comma=off}} → Use Template:Para to use digit grouping by gap (thin space) as a thousands separator: {{convert|1234567|m|ft|comma=gaps}} → Default behaviour, for comparison: {{convert|1234567|m|ft}} → Setting Template:Para will only add the separator when the number of digits is 5 or more: {{convert|1234|m|ft|comma=5}} → {{convert|1234567|m|ft|comma=5}} → Default behaviour, for comparison: {{convert|1234|m|ft}} → Output manipulation Brackets and separators: 10 m [33 ft] Punctuation that distinguishes the two measurements is set by Template:Para. Options are: b (the default), sqbr, comma, or, br, x|…: {{convert|10|m|ft|disp=sqbr}} → {{convert|10|m|ft|disp=comma}} → {{convert|10|m|ft|disp=or}} → Default behaviour, for comparison: {{convert|10|m|ft}} → Setting Template:Para will force a new line (<br/>) {{convert|10|m|ft|disp=br}} → Also Template:Para will force a new line, and keep the brackets (useful in tables): {{convert|10|m|ft|disp=br()}} → Setting Template:Para allows any text as separator: {{convert|10|m|ft|disp=x|_MyText_}} → (To display spaces, use &nbsp;) Flipping (reordering) the two measurements: Setting Template:Para will flip (swap) the two measurements: {{convert|1|mi|m|order=flip}} → Default behaviour, for comparison: {{convert|1|mi|m}} → When converting to multiple units, the effect is: {{convert|10|km|mi nmi|order=flip}} → {{convert|10|km|nmi mi|order=flip}} → Fixed ordering of output units: Setting Template:Para shows the output-units as ordered; the input unit is skipped: {{convert|100|C|F C K|abbr=on|order=out}} → {{convert|200|PS|kW hp|0|abbr=on|order=out}} → See also: § Displaying parts of the output. Displaying parts of the result: It is possible to display only parts of the conversion result: Convert Output Returns {{convert|2|cuyd|m3}} Regular output (for comparison) {{convert|2|cuyd|m3|abbr=values}} Input and output numbers {{convert|2|cuyd|m3|disp=unit}} Input unit {{convert|2|cuyd|m3|disp=unit|adj=on}} Input unit, adjective (hyphenated) {{convert|2|cuyd|cuyd|disp=out}} Input (workaround. Template:Nowrap) {{convert|2|cuyd|m3|abbr=~}} Input: both name and symbol {{convert|2|cuyd|m3|disp=unit2}} Output unit (symbol) {{convert|2|cuyd|m3|disp=unit2|abbr=off}} Output unit (name) {{convert|2|cuyd|m3|disp=number}} Output value {{convert|2|cuyd|m3|disp=out}} Output value and unit name {{convert|2|cuyd|m3|disp=out|abbr=off}} Output value and unit symbol Display both input name and symbol: 2 kilopascals [kPa] Setting Template:Para returns both name and symbol of the first (input) unit: {{convert|2|kPa|psi|abbr=~}} → A {{convert|2|kPa|psi|abbr=~|adj=on}} pressure → Template:Nowrap Table options For the wikitable structure, there are three options: add a line-break, split the result over columns and make the table sortable. Enforced line break Template:Para adds a line-break and omits brackets. Template:Para adds a line-break and does add brackets to the converted value. This may be useful in tables: Template:Para Template:Para Table columns Using {convert} in a table cell, with Template:Para splits the result over two (or more) columns. By default units are not included in the table, however, they can be added using the Template:Para parameter. Multiple-unit outputs, like ftin, always output their units to the table. {{convert|10|m|ft|disp=table}} → Template:Para does the same, and also centers the text: {{convert|20|m|ft|disp=tablecen}} → The units are added as a column header:   kilograms pounds stone and pounds Template:Para Template:Para and Template:Para Template:Para and Template:Para Template:Para Template:Para (default) Sorting Use Template:Para to include a hidden numerical sortkey in the output, suitable for use in a table with sortable columns. Technically, this places a hidden string before the actual displayed values: {{convert|10|m|ft|sortable=on}} Template:Nowrap showing: . Use both Template:Para and Template:Para together to produce table columns (pipe symbols) for each value in sortable columns: m ft A B C D The generated sortkey is calculated in a consistent way based on both the value and its unit as passed to the convert template. In most cases convert uses the passed value converted to SI base units. It is therefore not necessarily the displayed value or other alternate units and is calculated regardless of output format options. Using different units or different order of units in individual rows should therefore not lead to incorrect sorting, although variations in rounding can give surprising results, since an unrounded number is used for the sortkey. Units The conversion factors and physical constants are sourced here. All units Template:Anchor'per' units: kg/hl, miles per gallon When using a slash (/), a unit like kg/hl is recognized as kilograms per hectolitre and will be converted with other mass/volume units. {{convert|1000|kg/hl}} → Population density (inhabitants per square mile) can be converted using {{convert|10|PD/sqmi|PD/km2}} → Vehicular fuel efficiency, commonly expressed in miles per gallon or litres per 100 km can also be converted {{convert|26|mpgUS|l/100km mpgimp}} → Template:AnchorUnits of difference: Expressing a change or difference in temperature We have already discussed standard temperature conversions (°C, °F, K), as shown in these two examples: {{#invoke:DemoTemplate|convert|10|C}} (standard temperature conversion) {{#invoke:DemoTemplate|convert|10–15|C}} (standard temperature range conversion) When expressing a temperature change (e.g., "The temperature increased by 10 °C"), or when comparing temperatures (e.g., "10 to 15 °C warmer"), we cannot use the standard temperature units (Template:Para, Template:Para and Template:Para), which refer to points on the respective scale. Instead, we must use one of the following "units of difference": Template:Para, Template:Para and Template:Para. Compare the following two examples with the two above: {{#invoke:DemoTemplate|convert|10|C-change}} increase in temperature {{#invoke:DemoTemplate|convert|10–15|C-change}} warmer than normal To produce multiple units in the output: {{#invoke:DemoTemplate|convert|10|C-change|F-change K-change}} difference Multiple units: 1 ft 5 in In input Base document Template:Slink lists options for multiple unit input (like ft,in). It can catch predefined sets only (units that can be subdivided; e.g., yd into ft): {{convert|1|yd|2|ft|3|in}} → {{convert|2|ft|3|in|cm}} → {{convert|1|lb|5|oz|g}} → In output Available multiple-unit output options predefined, like ftin and ydftin. The full list is at Template:Slink. {{convert|2|m|ftin}} → {{convert|2|m|ft in}} → , using a space, returns the decimal point Default behaviour, for comparison: {{convert|2|m}} → See also: Template:Tl a length used to measure horses Template:Tl a weight in ton, cwt, qr and lb Currency per unit: $/mi → $/km Using currency symbols in a $ per unit value, you can convert the per-unit: {{convert|10|$/mi|$/km}} → {{convert|1500|$/ozt|$/g}} → You can set the currency in both values using Template:Para: {{convert|10|$/mi|$/km|$=€}} → It is not possible to convert the currency. So, this result (mixed currencies) is not possible: Template:!mxt Template:Nay Using convert inside templates For usage in template code, like infoboxes, Template:Tlf has these options: Pre-formatting fraction input Module:Convert/helper can read regular input and pre-format it into Template:Tlf-accepted input. Your template can accept Template:Para and use {{#invoke:Convert/helper|number|16 7/8}} → {{#invoke:Convert/helper|number|16 7/8}} Using a Wikidata property Adding the Wikidata property code, like code Template:Para, to your template code automatically returns the Wikidata property for that article, and convert it. Both number and unit are read. Note: to return that property value for an other article, use Template:Para. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) {{convert|input=P2073|qid=Q1056131|ftin|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on|disp=out}} → For example see template:Infobox Telescope. Sometimes a property may have more than one value against it in Wikidata. You can use the Template:Para parameter to specify which of the values you want to use. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) Template:Wikidata entity link: {{convert|input=P2386|qual=Q613628|ft|abbr=on}} → Template:Wikidata entity link: {{convert|input=P2386|qual=Q1395645|ft|abbr=on}} → Parameter list Deprecated options TemplateData <templatedata> { "description": "Converts measurements to other units.", "params": { "1": { "label": "Value", "description": "The value to convert.", "type": "number", "required": true }, "2": { "label": "From unit", "description": "The unit for the provided value.", "type": "string", "example": "km", "required": true }, "3": { "label": "To units", "description": "The units to convert into. Separate units by a space for multiple outputs. In an output unit, use + for a multiplication space.", "type": "string", "example": "mi nmi", "suggested": true }, "4": { "label": "Precision or suffix", "description": "Significant digits after decimal dot or, if negative, exponent of ten.", "type": "number" }, "lk": { "label": "Link units", "description": "Indication of what units to apply wikilinks to. Use “on” for all, “in” for the input unit, “out” for the output units, or “off” for none of the units.", "default": "off", "type": "string", "example": "on" }, "abbr": { "label": "Abbreviation", "description": "Display for the units: “on” to display all units using their unit symbols, “off” to display all units in full words, “in” to display the unit symbol for the input unit, “out” to display the unit symbols for the output units, “unit” to display unit symbols for both input and output units when using scientific notation, “values” for no units at all (neither unit symbols nor full words of units).", "default": "out", "type": "string", "example": "on, unit, in, out, off", "suggested": true }, "sp": { "label": "Spelling", "description": "Spelling of units. Use “us” to display unit names using U.S. spelling.", "type": "string", "example": "us" }, "adj": { "label": "Adjective", "description": "Whether to use adjectival form. Use “on” for singular unit name appended by a hyphen, “mid” to put conversion at end, or “off” (default) for no adjectival form.", "type": "unbalanced-wikitext", "example": "on", "default": "off" }, "disp": { "label": "Conversion", "description": "Display conversion result: “or”: after ‘or’, “x”: with custom prefix and suffix, “b”: in parentheses, “table”/“tablecen”, “output only”: alone, “output number only”: alone and without unit, “unit”: not at all but input unit; if the value is a number it is used as precision.", "type": "string", "example": "b" }, "order": { "label": "Ordering", "description": "“flip” returns converted value first, input value second.", "type": "string", "example": "flip" }, "sigfig": { "label": "Significant figures", "description": "Indicates the number of significant figures to be used in rounding.", "type": "number" }, "round": { "label": "Rounding output", "description": "The type of rounding. “5” rounds the output number to nearest multiple of 5, “25” to nearest multiple of 25, “each” rounds each number in a range.", "type": "number" }, "comma": { "label": "Thousands separator", "description": "Sets or suppresses the use of thousands separators in the numbers. “off”: no separator; “gaps”: use space instead of comma as thousands separator; “5”: only add thousands separator when the integral part of the number uses 5 positions or more (10,000 or more; if using comma as thousands separator, 1234 would produce '1234', 12345 would produce '12,345').", "default": "on", "type": "string", "example": "off" }, "sortable": { "label": "Sort key", "description": "“on” generates a hidden sort key", "type": "string", "example": "on" }, "spell": { "label": "Spell numbers?", "description": "If used, spells input or input and output numbers in words, optionally capitalizing the first", "example": "'in', 'In', 'on', or 'On'", "type": "string" }, "sing": { "type": "string", "deprecated": "use adj=", "label": "Singular?", "description": "If 'yes', uses singular form of units (deprecated)", "example": "yes" }, "frac": { "label": "Fraction?", "description": "fraction as rounding unit", "type": "number" }, "$": { "label": "Currency symbol", "description": "sets currency symbol in both units", "example": "$=€ will show \" €10 per mile (€6.2/km)\"", "type": "string" }, "input": { "label": "WD property", "description": "Reads the property value of the item (article), then converts it", "example": " (P2046=area)", "type": "string" } }, "format": "inline" } </templatedata> See also Template:Temp Template:Temp Template:Temp to convert historical prices to their current equivalent. Template:Convert navs Template:Sandbox other at 2800 rpm	10.0:1
1959	2 × 4-Barrel Carbs	Template:Documentation subpage Template:Hatnote {{#ifeq:Engine|Template:Convert|Template:High-risk}} Template:Transwiki guide Template:Lua Template Template:Tl calculates from one measurement unit to another one, and then presents the results formatted. The complete list of unit symbols recognized by the template is at Module:Convert/documentation/conversion data. For example: {{convert|2|km|mi}} → (km entered, so converted into mile) {{convert|7|mi|km}} → (mi entered, so converted into km) Numbers can be rounded, units can be abbreviated into symbols: {{convert|2|km|mi|2|abbr=on}} → {{convert|7|mi|km|2|abbr=on}} → Value ranges can be entered using |to|... or |-|...: {{convert|2|to|5|km|mi}} → {{convert|2|-|5|km|mi}} → Combined effect example: {{convert|2|-|5|km|mi|2|abbr=on}} → {{convert|2|and|5|km|mi|sigfig=3|abbr=off}} → Units to convert Template:Hatnote Enter units to convert from into: {{convert|1|lb|kg}} → SI units generally accept prefixes, like "m" for milli (10−3), and "M" for mega (106) For "per" units, use "/" (slash): kg/ha For three-unit units, etc., see Template:Cl Unit name or symbol (abbreviation): 1 pound or 1 lb? By default, the first quantity shows the unit name, the second shows the symbol (or abbreviation): {{convert|1|lb|kg}} → Using Template:Para is the reverse behaviour to the default: {{convert|1|lb|kg|abbr=in}} → To abbreviate both or neither: {{convert|1|lb|kg|abbr=on}} → {{convert|1|lb|kg|abbr=off}} → Convenience: Template:Tlf has Template:Para by default Template Template:Tl is the same as Template:Tlf, except that it has Template:Para as the default behaviour. In Template:Tlf, all other options are available. So: {{cvt|1|lb|kg}} → Template:Cvt is equivalent to: {{convert|1|lb|kg|abbr=on}} → Template:Cvt Adjective: a 10-mile distance Use Template:Para to produce the adjectival (hyphenated) form: A {{convert|10|mi|km|adj=on}} distance → A distance. Default behaviour, for comparison: {{convert|10|mi|km}} to go → to go. Template:Para does not produce hyphens with unit symbols, as per Manual of Style: A {{convert|9|in|cm|adj=on|abbr=on}} nail → A nail. Template:AnchorRounding: 100 ft is 30 m or 30.5 m or 30.48 m? Template:Hatnote By definition, 100 ft equals . In practical use, it is common to round the calculated metric number. With that, there are several possibilities. Default rounding By Template:Tlf default, the conversion result will be rounded either to precision comparable to that of the input value (the number of digits after the decimal point—or the negative of the number of non-significant zeroes before the point—is increased by one if the conversion is a multiplication by a number between 0.02 and 0.2, remains the same if the factor is between 0.2 and 2, is decreased by 1 if it is between 2 and 20, and so on) or to two significant digits, whichever is more precise. An exception to this is rounding temperatures (see below). Examples of rounding Input Displays as Note {{convert|123|ft|m|-1}} {{convert|123|ft|m}} same output as with 0 (below) {{convert|123|ft|m|0}} {{convert|123|ft|m|1}} {{convert|123|ft|m|2}} The more-exact value is 37.4904 m or so, which gets converted to 37 m if this parameter is not specified at all. {{convert|500|ft|m|-1}} {{convert|500|ft|m}} same output as with −1 (above), because the conversion factor is between 0.2 and 2 (hence, it should produce same double-zero precision (−2) as in the input value), but the conversion must produce two significant digits at a minimum (hence, a higher single-zero precision (−1) is used) {{convert|500|ft|m|0}} {{convert|500|ft|m|1}} {{convert|500|ft|m|2}} exact value is 152.4 m {{convert|500|ft|cm|-3}} {{convert|500|ft|cm}} same output as with −3 (above), because the conversion factor is between 20 and 200 (hence, it should decrease input value's double-zero precision (−2) by 2), but the conversion must produce two significant digits at a minimum (hence, a higher triple-zero precision (−3) is used) {{convert|500|ft|cm|0}} Convert supports four types of rounding: Round to a given precision: use a precision number Specify the desired precision with the fourth unnamed parameter (or third unnamed parameter if the "convert to" parameter is omitted; or fifth unnamed parameter if a range is specified; or fourth unnamed parameter again if a range is specified and the "convert to" parameter is omitted; needs to be replaced with a "precision" named parameter). The conversion is rounded off to the nearest multiple of Template:Frac to the power of this number. For instance, if the result is 8621 and the round number is "-2", the result will be 8600. If the result is "234.0283043" and the round number is "0", the result will be 234. Round to a given number of significant figures: Template:Para To specify the output number to be with n significant figures use Template:Para: {{convert|1200|ft|m|sigfig=4}} → {{convert|1200|ft|m|sigfig=3}} → {{convert|1200|ft|m|sigfig=2}} → {{convert|1200|ft|m|sigfig=1}} → Default behaviour, for comparison: {{convert|1200|ft|m}} → Setting Template:Para to a value less than 1 is meaningless: {{convert|1200|ft|m|sigfig=0}} → Template:Nay Round to a multiple of 5: 15, 20, 25, ... Using Template:Para rounds the outcome to a multiple of 5. {{convert|10|m|ft}} → {{convert|10|m|ft|round=5}} → Similar: using Template:Para rounds the outcome to a multiple of 25. {{convert|10|m|ft}} → {{convert|10|m|ft|round=25}} → Default behaviour, for comparison: {{convert|10|m|ft|sigfig=4}} → In a range, one can round each value individually to the default. Use Template:Para: {{convert|10 x 200 x 3000|m|ft}} → {{convert|10 x 200 x 3000|m|ft|round=each}} → Round to a multiple of a given fraction: Template:Frac inch Specify the desired denominator using Template:Para. (Denominator is the below-the-slash number, for example the 3 in Template:Frac). {{convert|5.56|cm|in|frac=16}} → {{convert|8|cm|in|frac=4}} → The fraction is reduced when possible: {{convert|8|cm|in|frac=100}} → Default behaviour uses decimal notation: {{convert|5.56|cm|in}} → Template:AnchorRounding temperatures: °C, °F and K In temperatures, the conversion will be rounded either to the precision comparable to that of the input value or to that which would give three significant figures when expressed in kelvins, whichever is more precise. {{#invoke:DemoTemplate|convert|10,000|C|F K}} {{#invoke:DemoTemplate|convert|10,000.1|C|F K}} {{#invoke:DemoTemplate|convert|-272|C|F K}} {{#invoke:DemoTemplate|convert|-272|C}} {{#invoke:DemoTemplate|convert|100|C|F K}} {{#invoke:DemoTemplate|convert|0|C|F K}} The precision of the input number in example (1) is one digit, but the precision of its Kelvins expression is three, so the precision of the Fahrenheit conversion is made three (made 180...) . (1) and (2) seem to belie the fact that a , and make the 32 degrees difference shown in (1) begin to seem off somehow. Result (1) seems off until you set the significant figures yourself with Template:Para: {{#invoke:DemoTemplate|convert|10000|C|sigfig=5}} or you set the precision positionally, relative to the decimal point (zero being at the decimal point): {{#invoke:DemoTemplate|convert|10000|C|0}} The precision of the input number in example (2) is six, so the precision of the Fahrenheit output is, whereas before, Kelvins had determined it to be three. Examples (3) and (4) show how this can be hidden and generate questions, but it occurs there because the Kelvins conversion generated two fractional parts. (Before it was the input number that generated the fractional part.) In example (3) the three input digits converted into five significant output digits because of the two digits after the decimal point, generated by the Kelvins conversion. This happened again in (5), but in (6) decimal fractions were neither given as input nor induced by the Kelvins conversion. Rounding input There is limited support for rounding the displayed input number. The rounding takes place after conversion, so the output is based on the full-precision input. This is useful when the input is produced by Template:Tlc or otherwise available to a higher precision than is usefully displayed, and it's desirable to avoid double-rounding. To round the input to a specified number of digits after the decimal point, use one of the parameters: Template:Para Template:Para Template:Para Template:Para Note that there is no Template:ParaTemplate:Nay or similar for rounding above the decimal place. Neither is there support for significant figures, multiples of 5, or any other output-rounding feature. The default precision is computed based on the input, so an explicit output precision must usually be supplied: Template:Tlc → Template:Nay (precisions are mismatched) Template:Tlc → Template:Aye In this case, if the input were rounded before conversion, a different result would be obtained: Template:Tlc → Template:Nay (double rounding) Into multiple units: Separate the multiple output units by a space: {{convert|10|C|F K}} → {{convert|5|km|mi nmi}} → If the output unit names contain spaces, use + as the separator. See also: For multiple-unit options like 1 ft 5 in, see Template:Section link and Template:Section link. Ranges of values Template:For A range converts two values and separates them by your choice of words and punctuation. A range: 6 to 17 kg (13 to 37 lb) Range indicators are entered as the second parameter (between the values). Range separators can be: Template:Convert/doc/range separator list Multiple dimensions: Use by: {{convert|6|by|12|ft|m}} → Use ×, multiplication sign, or x, letter: {{convert|6|x|12|m|ft}} → In science, the formal way is to set |x| and Template:Para (keeping dimensions right, like in area = x km2): {{convert|6|x|12|m|ft|abbr=on}} → Lists of values: 20, 40, or 60 miles {{convert|20|,|40|, or|60|mi}} → About feet, inch in ranges and multiples While it is possible to enter feet, inch in a simple conversion, this is not possible for ranges: {{convert|1|ft|3|in|x|3|ft|5|in|mm}} → Template:Nay Default behaviour, for comparison: {{convert|1|ft|3|in|mm}} → However, converting metric units into feet and inches with Template:Para can produce the desired output: {{convert|380|x|1040|mm|ftin|order=flip}} → Words Spelling of unit name: international metre or US meter? Default spelling of units is in the en (generic) locale. To show en-US spelling, use Template:Para: {{convert|1|m|ft}} → —default {{convert|1|m|ft|sp=us}} → Spell out numbers: ten miles To write a number in words, use Template:Para: {{convert|10|mi|m|spell=in}} → To spell out both in and out values, use Template:Para: {{convert|10|mi|m|spell=on}} → To make first letter a capital, use Template:Para, Template:Para {{convert|10|mi|m|spell=In}} → {{convert|10|mi|m|spell=On}} → Remember that the spelling of the units (ft, m) is independently set by Template:Para. To the extreme: {{convert|10|mi|m|spell=on|abbr=off|sp=us}} → Inserted before units: 4 planted acres {{convert|4|acre||adj=pre|planted}} → disp=preunit is similar, but has no separator after the specified text, and can have different text for the output value: {{convert|4|acre||disp=preunit|planted }} → {{convert|4|acre||disp=preunit|planted |reforested-}} → After adjective unit: A corridor Note that two units (in this case, ft and m) are required. Use with just one unit will generate an error message. {{convert|10|ft|m|adj=mid|-long}} → Plurals: 1 inch, 2 inches The unit symbol is singular always. Depending on the preceding number only, a unit name can be shown plural. {{convert|1|metre}} → {{convert|2|metre}} → {{convert|2|metre|abbr=on}} → Exception Entering the unit spelled |foot| forces singular output "foot", whatever the number is. {{convert|100|foot|abbr=off}} → Fractions: one-eighth of an imperial pint The convert template also supports spelling out fractions. {{convert|3+1/2|oz|g|spell=in}} → Any additional words needed for the fraction can also be added at the end of the template. {{convert|1/8|imppt|ml|spell=in|adj=pre|of an}} → Wrapping and line breaking See Template:Section link Spelling out "thousands", "millions", etc. Most unit codes accept a prefix of e3 (thousand) or e6 (million) or e9 (billion). {{convert|100|e6mi|e6km}} → {{convert|120|e6acre}} → {{convert|120|e6acre|e3km2}} → To display both input and output in scientific notation, use Template:Para {{convert|100|e6mi|e6km|abbr=on}} → To spell out "thousands", "millions", etc., Template:Para abbreviates the unit; Template:Para displays both full unit names. {{convert|100|e6mi|e6km|abbr=unit}} → {{convert|100|e6mi|e6km|abbr=off}} → Numbers Using an SI prefix: gigametre (Gm), or micrometre (μm) Template:Sidebar metric prefixes (small) Units can have an SI prefix like G before the unit: Gm, and giga before the name: gigametre. These are plain multiplication factors. To illustrate, these are trivial calculations (from metre to metre), showing the multiplication factor: The prefix can be added before the SI unit (here: unit m for metre): {{convert|12|Gm|mi|abbr=on}} → Mm: km: mm: μm: um: (letter "u" can be used for "μ" here) The prefix can be used in the output unit: {{convert|12000|mi|Mm|abbr=on}} → {{convert|12|in|μm|abbr=on}} → As an exception, the non-SI unit "inch" can have the "μ" prefix too: {{convert|12|μm|μin|abbr=on}} → Engineering notation: 7 × 106 m In the unit: e6m Engineering notation can be entered as a "prefix" to the unit: {{convert|70|e6m}} → The same is possible for the output unit: {{convert|23,000,000|ft|e6m}} → Any standard unit (not a combination, multiple, or built-in unit) can have such a prefix: e3 (thousand), e6 (million), e9 (billion), e12 (trillion), e15 (quadrillion). Scientific notation: 1.23 × 10−14 In scientific notation, a number is written like Template:Rnd. The plain number has exactly one digit before the decimal point. With Template:Tlf, the input can be in e-notation such as 12.3e4. This value is displayed as a power of ten, and the output is displayed in scientific notation, except that an output value satisfying 0.01 <= v < 1000 is shown as a normal number. In addition, if the output value is 1000 and sigfig=4 is used, the value is displayed as a normal number. {{convert|12.3e-15|atm|atm|abbr=on}} → {{convert|0.00000005|atm|atm|abbr=on}} → Input with fractions: The number to convert can be written in fractions. Both / (keyboard slash) and ⁄ (fraction slash) are accepted: {{convert|1/2|in|mm|1}} → {{convert|1⁄2|in|mm|1}} → With positive mixed numbers (a positive integer and a fraction), use a + sign {{convert|2+1⁄2|in|mm|1}} → With negative mixed numbers, use a hyphen - and repeat it: {{convert|-2-1⁄2|in|mm|1}} → Note that the following cases are not interpreted as mixed numbers: {{convert|2-1⁄2|in|mm|1}} → . This is interpreted as a range from 2 inches to 1⁄2 inch. {{convert|-2+1⁄2|in|mm|1}} → Template:Nay This is neither a mixed number nor a range, and mathematical expressions requiring calculations are not allowed here. Horizontal fraction bar: Template:Sfrac inch Using a double slash (//) provides a horizontal fraction bar for the original (input) unit: {{convert|1//2|in|mm|1}} → {{convert|6+3//8|in|mm|1}} → Using a negative value for Template:Para provides a horizontal fraction bar for the converted (output) unit: {{convert|12.7|mm|frac=-2}} → {{convert|161.9|mm|frac=-8}} → Thousands separator: 1,000 mi or 1000 mi In input, a comma for thousands separator is accepted but not required; a gap (space) is not accepted. In output, by default, the thousand separator is the comma: {{convert|1234567|m|ft}} → {{convert|1,234,567|m|ft}} → Set Template:Para to remove the separator from the output: {{convert|1234567|m|ft|comma=off}} → Use Template:Para to use digit grouping by gap (thin space) as a thousands separator: {{convert|1234567|m|ft|comma=gaps}} → Default behaviour, for comparison: {{convert|1234567|m|ft}} → Setting Template:Para will only add the separator when the number of digits is 5 or more: {{convert|1234|m|ft|comma=5}} → {{convert|1234567|m|ft|comma=5}} → Default behaviour, for comparison: {{convert|1234|m|ft}} → Output manipulation Brackets and separators: 10 m [33 ft] Punctuation that distinguishes the two measurements is set by Template:Para. Options are: b (the default), sqbr, comma, or, br, x|…: {{convert|10|m|ft|disp=sqbr}} → {{convert|10|m|ft|disp=comma}} → {{convert|10|m|ft|disp=or}} → Default behaviour, for comparison: {{convert|10|m|ft}} → Setting Template:Para will force a new line (<br/>) {{convert|10|m|ft|disp=br}} → Also Template:Para will force a new line, and keep the brackets (useful in tables): {{convert|10|m|ft|disp=br()}} → Setting Template:Para allows any text as separator: {{convert|10|m|ft|disp=x|_MyText_}} → (To display spaces, use &nbsp;) Flipping (reordering) the two measurements: Setting Template:Para will flip (swap) the two measurements: {{convert|1|mi|m|order=flip}} → Default behaviour, for comparison: {{convert|1|mi|m}} → When converting to multiple units, the effect is: {{convert|10|km|mi nmi|order=flip}} → {{convert|10|km|nmi mi|order=flip}} → Fixed ordering of output units: Setting Template:Para shows the output-units as ordered; the input unit is skipped: {{convert|100|C|F C K|abbr=on|order=out}} → {{convert|200|PS|kW hp|0|abbr=on|order=out}} → See also: § Displaying parts of the output. Displaying parts of the result: It is possible to display only parts of the conversion result: Convert Output Returns {{convert|2|cuyd|m3}} Regular output (for comparison) {{convert|2|cuyd|m3|abbr=values}} Input and output numbers {{convert|2|cuyd|m3|disp=unit}} Input unit {{convert|2|cuyd|m3|disp=unit|adj=on}} Input unit, adjective (hyphenated) {{convert|2|cuyd|cuyd|disp=out}} Input (workaround. Template:Nowrap) {{convert|2|cuyd|m3|abbr=~}} Input: both name and symbol {{convert|2|cuyd|m3|disp=unit2}} Output unit (symbol) {{convert|2|cuyd|m3|disp=unit2|abbr=off}} Output unit (name) {{convert|2|cuyd|m3|disp=number}} Output value {{convert|2|cuyd|m3|disp=out}} Output value and unit name {{convert|2|cuyd|m3|disp=out|abbr=off}} Output value and unit symbol Display both input name and symbol: 2 kilopascals [kPa] Setting Template:Para returns both name and symbol of the first (input) unit: {{convert|2|kPa|psi|abbr=~}} → A {{convert|2|kPa|psi|abbr=~|adj=on}} pressure → Template:Nowrap Table options For the wikitable structure, there are three options: add a line-break, split the result over columns and make the table sortable. Enforced line break Template:Para adds a line-break and omits brackets. Template:Para adds a line-break and does add brackets to the converted value. This may be useful in tables: Template:Para Template:Para Table columns Using {convert} in a table cell, with Template:Para splits the result over two (or more) columns. By default units are not included in the table, however, they can be added using the Template:Para parameter. Multiple-unit outputs, like ftin, always output their units to the table. {{convert|10|m|ft|disp=table}} → Template:Para does the same, and also centers the text: {{convert|20|m|ft|disp=tablecen}} → The units are added as a column header:   kilograms pounds stone and pounds Template:Para Template:Para and Template:Para Template:Para and Template:Para Template:Para Template:Para (default) Sorting Use Template:Para to include a hidden numerical sortkey in the output, suitable for use in a table with sortable columns. Technically, this places a hidden string before the actual displayed values: {{convert|10|m|ft|sortable=on}} Template:Nowrap showing: . Use both Template:Para and Template:Para together to produce table columns (pipe symbols) for each value in sortable columns: m ft A B C D The generated sortkey is calculated in a consistent way based on both the value and its unit as passed to the convert template. In most cases convert uses the passed value converted to SI base units. It is therefore not necessarily the displayed value or other alternate units and is calculated regardless of output format options. Using different units or different order of units in individual rows should therefore not lead to incorrect sorting, although variations in rounding can give surprising results, since an unrounded number is used for the sortkey. Units The conversion factors and physical constants are sourced here. All units Template:Anchor'per' units: kg/hl, miles per gallon When using a slash (/), a unit like kg/hl is recognized as kilograms per hectolitre and will be converted with other mass/volume units. {{convert|1000|kg/hl}} → Population density (inhabitants per square mile) can be converted using {{convert|10|PD/sqmi|PD/km2}} → Vehicular fuel efficiency, commonly expressed in miles per gallon or litres per 100 km can also be converted {{convert|26|mpgUS|l/100km mpgimp}} → Template:AnchorUnits of difference: Expressing a change or difference in temperature We have already discussed standard temperature conversions (°C, °F, K), as shown in these two examples: {{#invoke:DemoTemplate|convert|10|C}} (standard temperature conversion) {{#invoke:DemoTemplate|convert|10–15|C}} (standard temperature range conversion) When expressing a temperature change (e.g., "The temperature increased by 10 °C"), or when comparing temperatures (e.g., "10 to 15 °C warmer"), we cannot use the standard temperature units (Template:Para, Template:Para and Template:Para), which refer to points on the respective scale. Instead, we must use one of the following "units of difference": Template:Para, Template:Para and Template:Para. Compare the following two examples with the two above: {{#invoke:DemoTemplate|convert|10|C-change}} increase in temperature {{#invoke:DemoTemplate|convert|10–15|C-change}} warmer than normal To produce multiple units in the output: {{#invoke:DemoTemplate|convert|10|C-change|F-change K-change}} difference Multiple units: 1 ft 5 in In input Base document Template:Slink lists options for multiple unit input (like ft,in). It can catch predefined sets only (units that can be subdivided; e.g., yd into ft): {{convert|1|yd|2|ft|3|in}} → {{convert|2|ft|3|in|cm}} → {{convert|1|lb|5|oz|g}} → In output Available multiple-unit output options predefined, like ftin and ydftin. The full list is at Template:Slink. {{convert|2|m|ftin}} → {{convert|2|m|ft in}} → , using a space, returns the decimal point Default behaviour, for comparison: {{convert|2|m}} → See also: Template:Tl a length used to measure horses Template:Tl a weight in ton, cwt, qr and lb Currency per unit: $/mi → $/km Using currency symbols in a $ per unit value, you can convert the per-unit: {{convert|10|$/mi|$/km}} → {{convert|1500|$/ozt|$/g}} → You can set the currency in both values using Template:Para: {{convert|10|$/mi|$/km|$=€}} → It is not possible to convert the currency. So, this result (mixed currencies) is not possible: Template:!mxt Template:Nay Using convert inside templates For usage in template code, like infoboxes, Template:Tlf has these options: Pre-formatting fraction input Module:Convert/helper can read regular input and pre-format it into Template:Tlf-accepted input. Your template can accept Template:Para and use {{#invoke:Convert/helper|number|16 7/8}} → {{#invoke:Convert/helper|number|16 7/8}} Using a Wikidata property Adding the Wikidata property code, like code Template:Para, to your template code automatically returns the Wikidata property for that article, and convert it. Both number and unit are read. Note: to return that property value for an other article, use Template:Para. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) {{convert|input=P2073|qid=Q1056131|ftin|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on|disp=out}} → For example see template:Infobox Telescope. Sometimes a property may have more than one value against it in Wikidata. You can use the Template:Para parameter to specify which of the values you want to use. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) Template:Wikidata entity link: {{convert|input=P2386|qual=Q613628|ft|abbr=on}} → Template:Wikidata entity link: {{convert|input=P2386|qual=Q1395645|ft|abbr=on}} → Parameter list Deprecated options TemplateData <templatedata> { "description": "Converts measurements to other units.", "params": { "1": { "label": "Value", "description": "The value to convert.", "type": "number", "required": true }, "2": { "label": "From unit", "description": "The unit for the provided value.", "type": "string", "example": "km", "required": true }, "3": { "label": "To units", "description": "The units to convert into. Separate units by a space for multiple outputs. In an output unit, use + for a multiplication space.", "type": "string", "example": "mi nmi", "suggested": true }, "4": { "label": "Precision or suffix", "description": "Significant digits after decimal dot or, if negative, exponent of ten.", "type": "number" }, "lk": { "label": "Link units", "description": "Indication of what units to apply wikilinks to. Use “on” for all, “in” for the input unit, “out” for the output units, or “off” for none of the units.", "default": "off", "type": "string", "example": "on" }, "abbr": { "label": "Abbreviation", "description": "Display for the units: “on” to display all units using their unit symbols, “off” to display all units in full words, “in” to display the unit symbol for the input unit, “out” to display the unit symbols for the output units, “unit” to display unit symbols for both input and output units when using scientific notation, “values” for no units at all (neither unit symbols nor full words of units).", "default": "out", "type": "string", "example": "on, unit, in, out, off", "suggested": true }, "sp": { "label": "Spelling", "description": "Spelling of units. Use “us” to display unit names using U.S. spelling.", "type": "string", "example": "us" }, "adj": { "label": "Adjective", "description": "Whether to use adjectival form. Use “on” for singular unit name appended by a hyphen, “mid” to put conversion at end, or “off” (default) for no adjectival form.", "type": "unbalanced-wikitext", "example": "on", "default": "off" }, "disp": { "label": "Conversion", "description": "Display conversion result: “or”: after ‘or’, “x”: with custom prefix and suffix, “b”: in parentheses, “table”/“tablecen”, “output only”: alone, “output number only”: alone and without unit, “unit”: not at all but input unit; if the value is a number it is used as precision.", "type": "string", "example": "b" }, "order": { "label": "Ordering", "description": "“flip” returns converted value first, input value second.", "type": "string", "example": "flip" }, "sigfig": { "label": "Significant figures", "description": "Indicates the number of significant figures to be used in rounding.", "type": "number" }, "round": { "label": "Rounding output", "description": "The type of rounding. “5” rounds the output number to nearest multiple of 5, “25” to nearest multiple of 25, “each” rounds each number in a range.", "type": "number" }, "comma": { "label": "Thousands separator", "description": "Sets or suppresses the use of thousands separators in the numbers. “off”: no separator; “gaps”: use space instead of comma as thousands separator; “5”: only add thousands separator when the integral part of the number uses 5 positions or more (10,000 or more; if using comma as thousands separator, 1234 would produce '1234', 12345 would produce '12,345').", "default": "on", "type": "string", "example": "off" }, "sortable": { "label": "Sort key", "description": "“on” generates a hidden sort key", "type": "string", "example": "on" }, "spell": { "label": "Spell numbers?", "description": "If used, spells input or input and output numbers in words, optionally capitalizing the first", "example": "'in', 'In', 'on', or 'On'", "type": "string" }, "sing": { "type": "string", "deprecated": "use adj=", "label": "Singular?", "description": "If 'yes', uses singular form of units (deprecated)", "example": "yes" }, "frac": { "label": "Fraction?", "description": "fraction as rounding unit", "type": "number" }, "$": { "label": "Currency symbol", "description": "sets currency symbol in both units", "example": "$=€ will show \" €10 per mile (€6.2/km)\"", "type": "string" }, "input": { "label": "WD property", "description": "Reads the property value of the item (article), then converts it", "example": " (P2046=area)", "type": "string" } }, "format": "inline" } </templatedata> See also Template:Temp Template:Temp Template:Temp to convert historical prices to their current equivalent. Template:Convert navs Template:Sandbox other at 5000 rpm	Template:Documentation subpage Template:Hatnote {{#ifeq:Engine|Template:Convert|Template:High-risk}} Template:Transwiki guide Template:Lua Template Template:Tl calculates from one measurement unit to another one, and then presents the results formatted. The complete list of unit symbols recognized by the template is at Module:Convert/documentation/conversion data. For example: {{convert|2|km|mi}} → (km entered, so converted into mile) {{convert|7|mi|km}} → (mi entered, so converted into km) Numbers can be rounded, units can be abbreviated into symbols: {{convert|2|km|mi|2|abbr=on}} → {{convert|7|mi|km|2|abbr=on}} → Value ranges can be entered using |to|... or |-|...: {{convert|2|to|5|km|mi}} → {{convert|2|-|5|km|mi}} → Combined effect example: {{convert|2|-|5|km|mi|2|abbr=on}} → {{convert|2|and|5|km|mi|sigfig=3|abbr=off}} → Units to convert Template:Hatnote Enter units to convert from into: {{convert|1|lb|kg}} → SI units generally accept prefixes, like "m" for milli (10−3), and "M" for mega (106) For "per" units, use "/" (slash): kg/ha For three-unit units, etc., see Template:Cl Unit name or symbol (abbreviation): 1 pound or 1 lb? By default, the first quantity shows the unit name, the second shows the symbol (or abbreviation): {{convert|1|lb|kg}} → Using Template:Para is the reverse behaviour to the default: {{convert|1|lb|kg|abbr=in}} → To abbreviate both or neither: {{convert|1|lb|kg|abbr=on}} → {{convert|1|lb|kg|abbr=off}} → Convenience: Template:Tlf has Template:Para by default Template Template:Tl is the same as Template:Tlf, except that it has Template:Para as the default behaviour. In Template:Tlf, all other options are available. So: {{cvt|1|lb|kg}} → Template:Cvt is equivalent to: {{convert|1|lb|kg|abbr=on}} → Template:Cvt Adjective: a 10-mile distance Use Template:Para to produce the adjectival (hyphenated) form: A {{convert|10|mi|km|adj=on}} distance → A distance. Default behaviour, for comparison: {{convert|10|mi|km}} to go → to go. Template:Para does not produce hyphens with unit symbols, as per Manual of Style: A {{convert|9|in|cm|adj=on|abbr=on}} nail → A nail. Template:AnchorRounding: 100 ft is 30 m or 30.5 m or 30.48 m? Template:Hatnote By definition, 100 ft equals . In practical use, it is common to round the calculated metric number. With that, there are several possibilities. Default rounding By Template:Tlf default, the conversion result will be rounded either to precision comparable to that of the input value (the number of digits after the decimal point—or the negative of the number of non-significant zeroes before the point—is increased by one if the conversion is a multiplication by a number between 0.02 and 0.2, remains the same if the factor is between 0.2 and 2, is decreased by 1 if it is between 2 and 20, and so on) or to two significant digits, whichever is more precise. An exception to this is rounding temperatures (see below). Examples of rounding Input Displays as Note {{convert|123|ft|m|-1}} {{convert|123|ft|m}} same output as with 0 (below) {{convert|123|ft|m|0}} {{convert|123|ft|m|1}} {{convert|123|ft|m|2}} The more-exact value is 37.4904 m or so, which gets converted to 37 m if this parameter is not specified at all. {{convert|500|ft|m|-1}} {{convert|500|ft|m}} same output as with −1 (above), because the conversion factor is between 0.2 and 2 (hence, it should produce same double-zero precision (−2) as in the input value), but the conversion must produce two significant digits at a minimum (hence, a higher single-zero precision (−1) is used) {{convert|500|ft|m|0}} {{convert|500|ft|m|1}} {{convert|500|ft|m|2}} exact value is 152.4 m {{convert|500|ft|cm|-3}} {{convert|500|ft|cm}} same output as with −3 (above), because the conversion factor is between 20 and 200 (hence, it should decrease input value's double-zero precision (−2) by 2), but the conversion must produce two significant digits at a minimum (hence, a higher triple-zero precision (−3) is used) {{convert|500|ft|cm|0}} Convert supports four types of rounding: Round to a given precision: use a precision number Specify the desired precision with the fourth unnamed parameter (or third unnamed parameter if the "convert to" parameter is omitted; or fifth unnamed parameter if a range is specified; or fourth unnamed parameter again if a range is specified and the "convert to" parameter is omitted; needs to be replaced with a "precision" named parameter). The conversion is rounded off to the nearest multiple of Template:Frac to the power of this number. For instance, if the result is 8621 and the round number is "-2", the result will be 8600. If the result is "234.0283043" and the round number is "0", the result will be 234. Round to a given number of significant figures: Template:Para To specify the output number to be with n significant figures use Template:Para: {{convert|1200|ft|m|sigfig=4}} → {{convert|1200|ft|m|sigfig=3}} → {{convert|1200|ft|m|sigfig=2}} → {{convert|1200|ft|m|sigfig=1}} → Default behaviour, for comparison: {{convert|1200|ft|m}} → Setting Template:Para to a value less than 1 is meaningless: {{convert|1200|ft|m|sigfig=0}} → Template:Nay Round to a multiple of 5: 15, 20, 25, ... Using Template:Para rounds the outcome to a multiple of 5. {{convert|10|m|ft}} → {{convert|10|m|ft|round=5}} → Similar: using Template:Para rounds the outcome to a multiple of 25. {{convert|10|m|ft}} → {{convert|10|m|ft|round=25}} → Default behaviour, for comparison: {{convert|10|m|ft|sigfig=4}} → In a range, one can round each value individually to the default. Use Template:Para: {{convert|10 x 200 x 3000|m|ft}} → {{convert|10 x 200 x 3000|m|ft|round=each}} → Round to a multiple of a given fraction: Template:Frac inch Specify the desired denominator using Template:Para. (Denominator is the below-the-slash number, for example the 3 in Template:Frac). {{convert|5.56|cm|in|frac=16}} → {{convert|8|cm|in|frac=4}} → The fraction is reduced when possible: {{convert|8|cm|in|frac=100}} → Default behaviour uses decimal notation: {{convert|5.56|cm|in}} → Template:AnchorRounding temperatures: °C, °F and K In temperatures, the conversion will be rounded either to the precision comparable to that of the input value or to that which would give three significant figures when expressed in kelvins, whichever is more precise. {{#invoke:DemoTemplate|convert|10,000|C|F K}} {{#invoke:DemoTemplate|convert|10,000.1|C|F K}} {{#invoke:DemoTemplate|convert|-272|C|F K}} {{#invoke:DemoTemplate|convert|-272|C}} {{#invoke:DemoTemplate|convert|100|C|F K}} {{#invoke:DemoTemplate|convert|0|C|F K}} The precision of the input number in example (1) is one digit, but the precision of its Kelvins expression is three, so the precision of the Fahrenheit conversion is made three (made 180...) . (1) and (2) seem to belie the fact that a , and make the 32 degrees difference shown in (1) begin to seem off somehow. Result (1) seems off until you set the significant figures yourself with Template:Para: {{#invoke:DemoTemplate|convert|10000|C|sigfig=5}} or you set the precision positionally, relative to the decimal point (zero being at the decimal point): {{#invoke:DemoTemplate|convert|10000|C|0}} The precision of the input number in example (2) is six, so the precision of the Fahrenheit output is, whereas before, Kelvins had determined it to be three. Examples (3) and (4) show how this can be hidden and generate questions, but it occurs there because the Kelvins conversion generated two fractional parts. (Before it was the input number that generated the fractional part.) In example (3) the three input digits converted into five significant output digits because of the two digits after the decimal point, generated by the Kelvins conversion. This happened again in (5), but in (6) decimal fractions were neither given as input nor induced by the Kelvins conversion. Rounding input There is limited support for rounding the displayed input number. The rounding takes place after conversion, so the output is based on the full-precision input. This is useful when the input is produced by Template:Tlc or otherwise available to a higher precision than is usefully displayed, and it's desirable to avoid double-rounding. To round the input to a specified number of digits after the decimal point, use one of the parameters: Template:Para Template:Para Template:Para Template:Para Note that there is no Template:ParaTemplate:Nay or similar for rounding above the decimal place. Neither is there support for significant figures, multiples of 5, or any other output-rounding feature. The default precision is computed based on the input, so an explicit output precision must usually be supplied: Template:Tlc → Template:Nay (precisions are mismatched) Template:Tlc → Template:Aye In this case, if the input were rounded before conversion, a different result would be obtained: Template:Tlc → Template:Nay (double rounding) Into multiple units: Separate the multiple output units by a space: {{convert|10|C|F K}} → {{convert|5|km|mi nmi}} → If the output unit names contain spaces, use + as the separator. See also: For multiple-unit options like 1 ft 5 in, see Template:Section link and Template:Section link. Ranges of values Template:For A range converts two values and separates them by your choice of words and punctuation. A range: 6 to 17 kg (13 to 37 lb) Range indicators are entered as the second parameter (between the values). Range separators can be: Template:Convert/doc/range separator list Multiple dimensions: Use by: {{convert|6|by|12|ft|m}} → Use ×, multiplication sign, or x, letter: {{convert|6|x|12|m|ft}} → In science, the formal way is to set |x| and Template:Para (keeping dimensions right, like in area = x km2): {{convert|6|x|12|m|ft|abbr=on}} → Lists of values: 20, 40, or 60 miles {{convert|20|,|40|, or|60|mi}} → About feet, inch in ranges and multiples While it is possible to enter feet, inch in a simple conversion, this is not possible for ranges: {{convert|1|ft|3|in|x|3|ft|5|in|mm}} → Template:Nay Default behaviour, for comparison: {{convert|1|ft|3|in|mm}} → However, converting metric units into feet and inches with Template:Para can produce the desired output: {{convert|380|x|1040|mm|ftin|order=flip}} → Words Spelling of unit name: international metre or US meter? Default spelling of units is in the en (generic) locale. To show en-US spelling, use Template:Para: {{convert|1|m|ft}} → —default {{convert|1|m|ft|sp=us}} → Spell out numbers: ten miles To write a number in words, use Template:Para: {{convert|10|mi|m|spell=in}} → To spell out both in and out values, use Template:Para: {{convert|10|mi|m|spell=on}} → To make first letter a capital, use Template:Para, Template:Para {{convert|10|mi|m|spell=In}} → {{convert|10|mi|m|spell=On}} → Remember that the spelling of the units (ft, m) is independently set by Template:Para. To the extreme: {{convert|10|mi|m|spell=on|abbr=off|sp=us}} → Inserted before units: 4 planted acres {{convert|4|acre||adj=pre|planted}} → disp=preunit is similar, but has no separator after the specified text, and can have different text for the output value: {{convert|4|acre||disp=preunit|planted }} → {{convert|4|acre||disp=preunit|planted |reforested-}} → After adjective unit: A corridor Note that two units (in this case, ft and m) are required. Use with just one unit will generate an error message. {{convert|10|ft|m|adj=mid|-long}} → Plurals: 1 inch, 2 inches The unit symbol is singular always. Depending on the preceding number only, a unit name can be shown plural. {{convert|1|metre}} → {{convert|2|metre}} → {{convert|2|metre|abbr=on}} → Exception Entering the unit spelled |foot| forces singular output "foot", whatever the number is. {{convert|100|foot|abbr=off}} → Fractions: one-eighth of an imperial pint The convert template also supports spelling out fractions. {{convert|3+1/2|oz|g|spell=in}} → Any additional words needed for the fraction can also be added at the end of the template. {{convert|1/8|imppt|ml|spell=in|adj=pre|of an}} → Wrapping and line breaking See Template:Section link Spelling out "thousands", "millions", etc. Most unit codes accept a prefix of e3 (thousand) or e6 (million) or e9 (billion). {{convert|100|e6mi|e6km}} → {{convert|120|e6acre}} → {{convert|120|e6acre|e3km2}} → To display both input and output in scientific notation, use Template:Para {{convert|100|e6mi|e6km|abbr=on}} → To spell out "thousands", "millions", etc., Template:Para abbreviates the unit; Template:Para displays both full unit names. {{convert|100|e6mi|e6km|abbr=unit}} → {{convert|100|e6mi|e6km|abbr=off}} → Numbers Using an SI prefix: gigametre (Gm), or micrometre (μm) Template:Sidebar metric prefixes (small) Units can have an SI prefix like G before the unit: Gm, and giga before the name: gigametre. These are plain multiplication factors. To illustrate, these are trivial calculations (from metre to metre), showing the multiplication factor: The prefix can be added before the SI unit (here: unit m for metre): {{convert|12|Gm|mi|abbr=on}} → Mm: km: mm: μm: um: (letter "u" can be used for "μ" here) The prefix can be used in the output unit: {{convert|12000|mi|Mm|abbr=on}} → {{convert|12|in|μm|abbr=on}} → As an exception, the non-SI unit "inch" can have the "μ" prefix too: {{convert|12|μm|μin|abbr=on}} → Engineering notation: 7 × 106 m In the unit: e6m Engineering notation can be entered as a "prefix" to the unit: {{convert|70|e6m}} → The same is possible for the output unit: {{convert|23,000,000|ft|e6m}} → Any standard unit (not a combination, multiple, or built-in unit) can have such a prefix: e3 (thousand), e6 (million), e9 (billion), e12 (trillion), e15 (quadrillion). Scientific notation: 1.23 × 10−14 In scientific notation, a number is written like Template:Rnd. The plain number has exactly one digit before the decimal point. With Template:Tlf, the input can be in e-notation such as 12.3e4. This value is displayed as a power of ten, and the output is displayed in scientific notation, except that an output value satisfying 0.01 <= v < 1000 is shown as a normal number. In addition, if the output value is 1000 and sigfig=4 is used, the value is displayed as a normal number. {{convert|12.3e-15|atm|atm|abbr=on}} → {{convert|0.00000005|atm|atm|abbr=on}} → Input with fractions: The number to convert can be written in fractions. Both / (keyboard slash) and ⁄ (fraction slash) are accepted: {{convert|1/2|in|mm|1}} → {{convert|1⁄2|in|mm|1}} → With positive mixed numbers (a positive integer and a fraction), use a + sign {{convert|2+1⁄2|in|mm|1}} → With negative mixed numbers, use a hyphen - and repeat it: {{convert|-2-1⁄2|in|mm|1}} → Note that the following cases are not interpreted as mixed numbers: {{convert|2-1⁄2|in|mm|1}} → . This is interpreted as a range from 2 inches to 1⁄2 inch. {{convert|-2+1⁄2|in|mm|1}} → Template:Nay This is neither a mixed number nor a range, and mathematical expressions requiring calculations are not allowed here. Horizontal fraction bar: Template:Sfrac inch Using a double slash (//) provides a horizontal fraction bar for the original (input) unit: {{convert|1//2|in|mm|1}} → {{convert|6+3//8|in|mm|1}} → Using a negative value for Template:Para provides a horizontal fraction bar for the converted (output) unit: {{convert|12.7|mm|frac=-2}} → {{convert|161.9|mm|frac=-8}} → Thousands separator: 1,000 mi or 1000 mi In input, a comma for thousands separator is accepted but not required; a gap (space) is not accepted. In output, by default, the thousand separator is the comma: {{convert|1234567|m|ft}} → {{convert|1,234,567|m|ft}} → Set Template:Para to remove the separator from the output: {{convert|1234567|m|ft|comma=off}} → Use Template:Para to use digit grouping by gap (thin space) as a thousands separator: {{convert|1234567|m|ft|comma=gaps}} → Default behaviour, for comparison: {{convert|1234567|m|ft}} → Setting Template:Para will only add the separator when the number of digits is 5 or more: {{convert|1234|m|ft|comma=5}} → {{convert|1234567|m|ft|comma=5}} → Default behaviour, for comparison: {{convert|1234|m|ft}} → Output manipulation Brackets and separators: 10 m [33 ft] Punctuation that distinguishes the two measurements is set by Template:Para. Options are: b (the default), sqbr, comma, or, br, x|…: {{convert|10|m|ft|disp=sqbr}} → {{convert|10|m|ft|disp=comma}} → {{convert|10|m|ft|disp=or}} → Default behaviour, for comparison: {{convert|10|m|ft}} → Setting Template:Para will force a new line (<br/>) {{convert|10|m|ft|disp=br}} → Also Template:Para will force a new line, and keep the brackets (useful in tables): {{convert|10|m|ft|disp=br()}} → Setting Template:Para allows any text as separator: {{convert|10|m|ft|disp=x|_MyText_}} → (To display spaces, use &nbsp;) Flipping (reordering) the two measurements: Setting Template:Para will flip (swap) the two measurements: {{convert|1|mi|m|order=flip}} → Default behaviour, for comparison: {{convert|1|mi|m}} → When converting to multiple units, the effect is: {{convert|10|km|mi nmi|order=flip}} → {{convert|10|km|nmi mi|order=flip}} → Fixed ordering of output units: Setting Template:Para shows the output-units as ordered; the input unit is skipped: {{convert|100|C|F C K|abbr=on|order=out}} → {{convert|200|PS|kW hp|0|abbr=on|order=out}} → See also: § Displaying parts of the output. Displaying parts of the result: It is possible to display only parts of the conversion result: Convert Output Returns {{convert|2|cuyd|m3}} Regular output (for comparison) {{convert|2|cuyd|m3|abbr=values}} Input and output numbers {{convert|2|cuyd|m3|disp=unit}} Input unit {{convert|2|cuyd|m3|disp=unit|adj=on}} Input unit, adjective (hyphenated) {{convert|2|cuyd|cuyd|disp=out}} Input (workaround. Template:Nowrap) {{convert|2|cuyd|m3|abbr=~}} Input: both name and symbol {{convert|2|cuyd|m3|disp=unit2}} Output unit (symbol) {{convert|2|cuyd|m3|disp=unit2|abbr=off}} Output unit (name) {{convert|2|cuyd|m3|disp=number}} Output value {{convert|2|cuyd|m3|disp=out}} Output value and unit name {{convert|2|cuyd|m3|disp=out|abbr=off}} Output value and unit symbol Display both input name and symbol: 2 kilopascals [kPa] Setting Template:Para returns both name and symbol of the first (input) unit: {{convert|2|kPa|psi|abbr=~}} → A {{convert|2|kPa|psi|abbr=~|adj=on}} pressure → Template:Nowrap Table options For the wikitable structure, there are three options: add a line-break, split the result over columns and make the table sortable. Enforced line break Template:Para adds a line-break and omits brackets. Template:Para adds a line-break and does add brackets to the converted value. This may be useful in tables: Template:Para Template:Para Table columns Using {convert} in a table cell, with Template:Para splits the result over two (or more) columns. By default units are not included in the table, however, they can be added using the Template:Para parameter. Multiple-unit outputs, like ftin, always output their units to the table. {{convert|10|m|ft|disp=table}} → Template:Para does the same, and also centers the text: {{convert|20|m|ft|disp=tablecen}} → The units are added as a column header:   kilograms pounds stone and pounds Template:Para Template:Para and Template:Para Template:Para and Template:Para Template:Para Template:Para (default) Sorting Use Template:Para to include a hidden numerical sortkey in the output, suitable for use in a table with sortable columns. Technically, this places a hidden string before the actual displayed values: {{convert|10|m|ft|sortable=on}} Template:Nowrap showing: . Use both Template:Para and Template:Para together to produce table columns (pipe symbols) for each value in sortable columns: m ft A B C D The generated sortkey is calculated in a consistent way based on both the value and its unit as passed to the convert template. In most cases convert uses the passed value converted to SI base units. It is therefore not necessarily the displayed value or other alternate units and is calculated regardless of output format options. Using different units or different order of units in individual rows should therefore not lead to incorrect sorting, although variations in rounding can give surprising results, since an unrounded number is used for the sortkey. Units The conversion factors and physical constants are sourced here. All units Template:Anchor'per' units: kg/hl, miles per gallon When using a slash (/), a unit like kg/hl is recognized as kilograms per hectolitre and will be converted with other mass/volume units. {{convert|1000|kg/hl}} → Population density (inhabitants per square mile) can be converted using {{convert|10|PD/sqmi|PD/km2}} → Vehicular fuel efficiency, commonly expressed in miles per gallon or litres per 100 km can also be converted {{convert|26|mpgUS|l/100km mpgimp}} → Template:AnchorUnits of difference: Expressing a change or difference in temperature We have already discussed standard temperature conversions (°C, °F, K), as shown in these two examples: {{#invoke:DemoTemplate|convert|10|C}} (standard temperature conversion) {{#invoke:DemoTemplate|convert|10–15|C}} (standard temperature range conversion) When expressing a temperature change (e.g., "The temperature increased by 10 °C"), or when comparing temperatures (e.g., "10 to 15 °C warmer"), we cannot use the standard temperature units (Template:Para, Template:Para and Template:Para), which refer to points on the respective scale. Instead, we must use one of the following "units of difference": Template:Para, Template:Para and Template:Para. Compare the following two examples with the two above: {{#invoke:DemoTemplate|convert|10|C-change}} increase in temperature {{#invoke:DemoTemplate|convert|10–15|C-change}} warmer than normal To produce multiple units in the output: {{#invoke:DemoTemplate|convert|10|C-change|F-change K-change}} difference Multiple units: 1 ft 5 in In input Base document Template:Slink lists options for multiple unit input (like ft,in). It can catch predefined sets only (units that can be subdivided; e.g., yd into ft): {{convert|1|yd|2|ft|3|in}} → {{convert|2|ft|3|in|cm}} → {{convert|1|lb|5|oz|g}} → In output Available multiple-unit output options predefined, like ftin and ydftin. The full list is at Template:Slink. {{convert|2|m|ftin}} → {{convert|2|m|ft in}} → , using a space, returns the decimal point Default behaviour, for comparison: {{convert|2|m}} → See also: Template:Tl a length used to measure horses Template:Tl a weight in ton, cwt, qr and lb Currency per unit: $/mi → $/km Using currency symbols in a $ per unit value, you can convert the per-unit: {{convert|10|$/mi|$/km}} → {{convert|1500|$/ozt|$/g}} → You can set the currency in both values using Template:Para: {{convert|10|$/mi|$/km|$=€}} → It is not possible to convert the currency. So, this result (mixed currencies) is not possible: Template:!mxt Template:Nay Using convert inside templates For usage in template code, like infoboxes, Template:Tlf has these options: Pre-formatting fraction input Module:Convert/helper can read regular input and pre-format it into Template:Tlf-accepted input. Your template can accept Template:Para and use {{#invoke:Convert/helper|number|16 7/8}} → {{#invoke:Convert/helper|number|16 7/8}} Using a Wikidata property Adding the Wikidata property code, like code Template:Para, to your template code automatically returns the Wikidata property for that article, and convert it. Both number and unit are read. Note: to return that property value for an other article, use Template:Para. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) {{convert|input=P2073|qid=Q1056131|ftin|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on|disp=out}} → For example see template:Infobox Telescope. Sometimes a property may have more than one value against it in Wikidata. You can use the Template:Para parameter to specify which of the values you want to use. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) Template:Wikidata entity link: {{convert|input=P2386|qual=Q613628|ft|abbr=on}} → Template:Wikidata entity link: {{convert|input=P2386|qual=Q1395645|ft|abbr=on}} → Parameter list Deprecated options TemplateData <templatedata> { "description": "Converts measurements to other units.", "params": { "1": { "label": "Value", "description": "The value to convert.", "type": "number", "required": true }, "2": { "label": "From unit", "description": "The unit for the provided value.", "type": "string", "example": "km", "required": true }, "3": { "label": "To units", "description": "The units to convert into. Separate units by a space for multiple outputs. In an output unit, use + for a multiplication space.", "type": "string", "example": "mi nmi", "suggested": true }, "4": { "label": "Precision or suffix", "description": "Significant digits after decimal dot or, if negative, exponent of ten.", "type": "number" }, "lk": { "label": "Link units", "description": "Indication of what units to apply wikilinks to. Use “on” for all, “in” for the input unit, “out” for the output units, or “off” for none of the units.", "default": "off", "type": "string", "example": "on" }, "abbr": { "label": "Abbreviation", "description": "Display for the units: “on” to display all units using their unit symbols, “off” to display all units in full words, “in” to display the unit symbol for the input unit, “out” to display the unit symbols for the output units, “unit” to display unit symbols for both input and output units when using scientific notation, “values” for no units at all (neither unit symbols nor full words of units).", "default": "out", "type": "string", "example": "on, unit, in, out, off", "suggested": true }, "sp": { "label": "Spelling", "description": "Spelling of units. Use “us” to display unit names using U.S. spelling.", "type": "string", "example": "us" }, "adj": { "label": "Adjective", "description": "Whether to use adjectival form. Use “on” for singular unit name appended by a hyphen, “mid” to put conversion at end, or “off” (default) for no adjectival form.", "type": "unbalanced-wikitext", "example": "on", "default": "off" }, "disp": { "label": "Conversion", "description": "Display conversion result: “or”: after ‘or’, “x”: with custom prefix and suffix, “b”: in parentheses, “table”/“tablecen”, “output only”: alone, “output number only”: alone and without unit, “unit”: not at all but input unit; if the value is a number it is used as precision.", "type": "string", "example": "b" }, "order": { "label": "Ordering", "description": "“flip” returns converted value first, input value second.", "type": "string", "example": "flip" }, "sigfig": { "label": "Significant figures", "description": "Indicates the number of significant figures to be used in rounding.", "type": "number" }, "round": { "label": "Rounding output", "description": "The type of rounding. “5” rounds the output number to nearest multiple of 5, “25” to nearest multiple of 25, “each” rounds each number in a range.", "type": "number" }, "comma": { "label": "Thousands separator", "description": "Sets or suppresses the use of thousands separators in the numbers. “off”: no separator; “gaps”: use space instead of comma as thousands separator; “5”: only add thousands separator when the integral part of the number uses 5 positions or more (10,000 or more; if using comma as thousands separator, 1234 would produce '1234', 12345 would produce '12,345').", "default": "on", "type": "string", "example": "off" }, "sortable": { "label": "Sort key", "description": "“on” generates a hidden sort key", "type": "string", "example": "on" }, "spell": { "label": "Spell numbers?", "description": "If used, spells input or input and output numbers in words, optionally capitalizing the first", "example": "'in', 'In', 'on', or 'On'", "type": "string" }, "sing": { "type": "string", "deprecated": "use adj=", "label": "Singular?", "description": "If 'yes', uses singular form of units (deprecated)", "example": "yes" }, "frac": { "label": "Fraction?", "description": "fraction as rounding unit", "type": "number" }, "$": { "label": "Currency symbol", "description": "sets currency symbol in both units", "example": "$=€ will show \" €10 per mile (€6.2/km)\"", "type": "string" }, "input": { "label": "WD property", "description": "Reads the property value of the item (article), then converts it", "example": " (P2046=area)", "type": "string" } }, "format": "inline" } </templatedata> See also Template:Temp Template:Temp Template:Temp to convert historical prices to their current equivalent. Template:Convert navs Template:Sandbox other at 3600 rpm
1960–1961		Template:Documentation subpage Template:Hatnote {{#ifeq:Engine|Template:Convert|Template:High-risk}} Template:Transwiki guide Template:Lua Template Template:Tl calculates from one measurement unit to another one, and then presents the results formatted. The complete list of unit symbols recognized by the template is at Module:Convert/documentation/conversion data. For example: {{convert|2|km|mi}} → (km entered, so converted into mile) {{convert|7|mi|km}} → (mi entered, so converted into km) Numbers can be rounded, units can be abbreviated into symbols: {{convert|2|km|mi|2|abbr=on}} → {{convert|7|mi|km|2|abbr=on}} → Value ranges can be entered using |to|... or |-|...: {{convert|2|to|5|km|mi}} → {{convert|2|-|5|km|mi}} → Combined effect example: {{convert|2|-|5|km|mi|2|abbr=on}} → {{convert|2|and|5|km|mi|sigfig=3|abbr=off}} → Units to convert Template:Hatnote Enter units to convert from into: {{convert|1|lb|kg}} → SI units generally accept prefixes, like "m" for milli (10−3), and "M" for mega (106) For "per" units, use "/" (slash): kg/ha For three-unit units, etc., see Template:Cl Unit name or symbol (abbreviation): 1 pound or 1 lb? By default, the first quantity shows the unit name, the second shows the symbol (or abbreviation): {{convert|1|lb|kg}} → Using Template:Para is the reverse behaviour to the default: {{convert|1|lb|kg|abbr=in}} → To abbreviate both or neither: {{convert|1|lb|kg|abbr=on}} → {{convert|1|lb|kg|abbr=off}} → Convenience: Template:Tlf has Template:Para by default Template Template:Tl is the same as Template:Tlf, except that it has Template:Para as the default behaviour. In Template:Tlf, all other options are available. So: {{cvt|1|lb|kg}} → Template:Cvt is equivalent to: {{convert|1|lb|kg|abbr=on}} → Template:Cvt Adjective: a 10-mile distance Use Template:Para to produce the adjectival (hyphenated) form: A {{convert|10|mi|km|adj=on}} distance → A distance. Default behaviour, for comparison: {{convert|10|mi|km}} to go → to go. Template:Para does not produce hyphens with unit symbols, as per Manual of Style: A {{convert|9|in|cm|adj=on|abbr=on}} nail → A nail. Template:AnchorRounding: 100 ft is 30 m or 30.5 m or 30.48 m? Template:Hatnote By definition, 100 ft equals . In practical use, it is common to round the calculated metric number. With that, there are several possibilities. Default rounding By Template:Tlf default, the conversion result will be rounded either to precision comparable to that of the input value (the number of digits after the decimal point—or the negative of the number of non-significant zeroes before the point—is increased by one if the conversion is a multiplication by a number between 0.02 and 0.2, remains the same if the factor is between 0.2 and 2, is decreased by 1 if it is between 2 and 20, and so on) or to two significant digits, whichever is more precise. An exception to this is rounding temperatures (see below). Examples of rounding Input Displays as Note {{convert|123|ft|m|-1}} {{convert|123|ft|m}} same output as with 0 (below) {{convert|123|ft|m|0}} {{convert|123|ft|m|1}} {{convert|123|ft|m|2}} The more-exact value is 37.4904 m or so, which gets converted to 37 m if this parameter is not specified at all. {{convert|500|ft|m|-1}} {{convert|500|ft|m}} same output as with −1 (above), because the conversion factor is between 0.2 and 2 (hence, it should produce same double-zero precision (−2) as in the input value), but the conversion must produce two significant digits at a minimum (hence, a higher single-zero precision (−1) is used) {{convert|500|ft|m|0}} {{convert|500|ft|m|1}} {{convert|500|ft|m|2}} exact value is 152.4 m {{convert|500|ft|cm|-3}} {{convert|500|ft|cm}} same output as with −3 (above), because the conversion factor is between 20 and 200 (hence, it should decrease input value's double-zero precision (−2) by 2), but the conversion must produce two significant digits at a minimum (hence, a higher triple-zero precision (−3) is used) {{convert|500|ft|cm|0}} Convert supports four types of rounding: Round to a given precision: use a precision number Specify the desired precision with the fourth unnamed parameter (or third unnamed parameter if the "convert to" parameter is omitted; or fifth unnamed parameter if a range is specified; or fourth unnamed parameter again if a range is specified and the "convert to" parameter is omitted; needs to be replaced with a "precision" named parameter). The conversion is rounded off to the nearest multiple of Template:Frac to the power of this number. For instance, if the result is 8621 and the round number is "-2", the result will be 8600. If the result is "234.0283043" and the round number is "0", the result will be 234. Round to a given number of significant figures: Template:Para To specify the output number to be with n significant figures use Template:Para: {{convert|1200|ft|m|sigfig=4}} → {{convert|1200|ft|m|sigfig=3}} → {{convert|1200|ft|m|sigfig=2}} → {{convert|1200|ft|m|sigfig=1}} → Default behaviour, for comparison: {{convert|1200|ft|m}} → Setting Template:Para to a value less than 1 is meaningless: {{convert|1200|ft|m|sigfig=0}} → Template:Nay Round to a multiple of 5: 15, 20, 25, ... Using Template:Para rounds the outcome to a multiple of 5. {{convert|10|m|ft}} → {{convert|10|m|ft|round=5}} → Similar: using Template:Para rounds the outcome to a multiple of 25. {{convert|10|m|ft}} → {{convert|10|m|ft|round=25}} → Default behaviour, for comparison: {{convert|10|m|ft|sigfig=4}} → In a range, one can round each value individually to the default. Use Template:Para: {{convert|10 x 200 x 3000|m|ft}} → {{convert|10 x 200 x 3000|m|ft|round=each}} → Round to a multiple of a given fraction: Template:Frac inch Specify the desired denominator using Template:Para. (Denominator is the below-the-slash number, for example the 3 in Template:Frac). {{convert|5.56|cm|in|frac=16}} → {{convert|8|cm|in|frac=4}} → The fraction is reduced when possible: {{convert|8|cm|in|frac=100}} → Default behaviour uses decimal notation: {{convert|5.56|cm|in}} → Template:AnchorRounding temperatures: °C, °F and K In temperatures, the conversion will be rounded either to the precision comparable to that of the input value or to that which would give three significant figures when expressed in kelvins, whichever is more precise. {{#invoke:DemoTemplate|convert|10,000|C|F K}} {{#invoke:DemoTemplate|convert|10,000.1|C|F K}} {{#invoke:DemoTemplate|convert|-272|C|F K}} {{#invoke:DemoTemplate|convert|-272|C}} {{#invoke:DemoTemplate|convert|100|C|F K}} {{#invoke:DemoTemplate|convert|0|C|F K}} The precision of the input number in example (1) is one digit, but the precision of its Kelvins expression is three, so the precision of the Fahrenheit conversion is made three (made 180...) . (1) and (2) seem to belie the fact that a , and make the 32 degrees difference shown in (1) begin to seem off somehow. Result (1) seems off until you set the significant figures yourself with Template:Para: {{#invoke:DemoTemplate|convert|10000|C|sigfig=5}} or you set the precision positionally, relative to the decimal point (zero being at the decimal point): {{#invoke:DemoTemplate|convert|10000|C|0}} The precision of the input number in example (2) is six, so the precision of the Fahrenheit output is, whereas before, Kelvins had determined it to be three. Examples (3) and (4) show how this can be hidden and generate questions, but it occurs there because the Kelvins conversion generated two fractional parts. (Before it was the input number that generated the fractional part.) In example (3) the three input digits converted into five significant output digits because of the two digits after the decimal point, generated by the Kelvins conversion. This happened again in (5), but in (6) decimal fractions were neither given as input nor induced by the Kelvins conversion. Rounding input There is limited support for rounding the displayed input number. The rounding takes place after conversion, so the output is based on the full-precision input. This is useful when the input is produced by Template:Tlc or otherwise available to a higher precision than is usefully displayed, and it's desirable to avoid double-rounding. To round the input to a specified number of digits after the decimal point, use one of the parameters: Template:Para Template:Para Template:Para Template:Para Note that there is no Template:ParaTemplate:Nay or similar for rounding above the decimal place. Neither is there support for significant figures, multiples of 5, or any other output-rounding feature. The default precision is computed based on the input, so an explicit output precision must usually be supplied: Template:Tlc → Template:Nay (precisions are mismatched) Template:Tlc → Template:Aye In this case, if the input were rounded before conversion, a different result would be obtained: Template:Tlc → Template:Nay (double rounding) Into multiple units: Separate the multiple output units by a space: {{convert|10|C|F K}} → {{convert|5|km|mi nmi}} → If the output unit names contain spaces, use + as the separator. See also: For multiple-unit options like 1 ft 5 in, see Template:Section link and Template:Section link. Ranges of values Template:For A range converts two values and separates them by your choice of words and punctuation. A range: 6 to 17 kg (13 to 37 lb) Range indicators are entered as the second parameter (between the values). Range separators can be: Template:Convert/doc/range separator list Multiple dimensions: Use by: {{convert|6|by|12|ft|m}} → Use ×, multiplication sign, or x, letter: {{convert|6|x|12|m|ft}} → In science, the formal way is to set |x| and Template:Para (keeping dimensions right, like in area = x km2): {{convert|6|x|12|m|ft|abbr=on}} → Lists of values: 20, 40, or 60 miles {{convert|20|,|40|, or|60|mi}} → About feet, inch in ranges and multiples While it is possible to enter feet, inch in a simple conversion, this is not possible for ranges: {{convert|1|ft|3|in|x|3|ft|5|in|mm}} → Template:Nay Default behaviour, for comparison: {{convert|1|ft|3|in|mm}} → However, converting metric units into feet and inches with Template:Para can produce the desired output: {{convert|380|x|1040|mm|ftin|order=flip}} → Words Spelling of unit name: international metre or US meter? Default spelling of units is in the en (generic) locale. To show en-US spelling, use Template:Para: {{convert|1|m|ft}} → —default {{convert|1|m|ft|sp=us}} → Spell out numbers: ten miles To write a number in words, use Template:Para: {{convert|10|mi|m|spell=in}} → To spell out both in and out values, use Template:Para: {{convert|10|mi|m|spell=on}} → To make first letter a capital, use Template:Para, Template:Para {{convert|10|mi|m|spell=In}} → {{convert|10|mi|m|spell=On}} → Remember that the spelling of the units (ft, m) is independently set by Template:Para. To the extreme: {{convert|10|mi|m|spell=on|abbr=off|sp=us}} → Inserted before units: 4 planted acres {{convert|4|acre||adj=pre|planted}} → disp=preunit is similar, but has no separator after the specified text, and can have different text for the output value: {{convert|4|acre||disp=preunit|planted }} → {{convert|4|acre||disp=preunit|planted |reforested-}} → After adjective unit: A corridor Note that two units (in this case, ft and m) are required. Use with just one unit will generate an error message. {{convert|10|ft|m|adj=mid|-long}} → Plurals: 1 inch, 2 inches The unit symbol is singular always. Depending on the preceding number only, a unit name can be shown plural. {{convert|1|metre}} → {{convert|2|metre}} → {{convert|2|metre|abbr=on}} → Exception Entering the unit spelled |foot| forces singular output "foot", whatever the number is. {{convert|100|foot|abbr=off}} → Fractions: one-eighth of an imperial pint The convert template also supports spelling out fractions. {{convert|3+1/2|oz|g|spell=in}} → Any additional words needed for the fraction can also be added at the end of the template. {{convert|1/8|imppt|ml|spell=in|adj=pre|of an}} → Wrapping and line breaking See Template:Section link Spelling out "thousands", "millions", etc. Most unit codes accept a prefix of e3 (thousand) or e6 (million) or e9 (billion). {{convert|100|e6mi|e6km}} → {{convert|120|e6acre}} → {{convert|120|e6acre|e3km2}} → To display both input and output in scientific notation, use Template:Para {{convert|100|e6mi|e6km|abbr=on}} → To spell out "thousands", "millions", etc., Template:Para abbreviates the unit; Template:Para displays both full unit names. {{convert|100|e6mi|e6km|abbr=unit}} → {{convert|100|e6mi|e6km|abbr=off}} → Numbers Using an SI prefix: gigametre (Gm), or micrometre (μm) Template:Sidebar metric prefixes (small) Units can have an SI prefix like G before the unit: Gm, and giga before the name: gigametre. These are plain multiplication factors. To illustrate, these are trivial calculations (from metre to metre), showing the multiplication factor: The prefix can be added before the SI unit (here: unit m for metre): {{convert|12|Gm|mi|abbr=on}} → Mm: km: mm: μm: um: (letter "u" can be used for "μ" here) The prefix can be used in the output unit: {{convert|12000|mi|Mm|abbr=on}} → {{convert|12|in|μm|abbr=on}} → As an exception, the non-SI unit "inch" can have the "μ" prefix too: {{convert|12|μm|μin|abbr=on}} → Engineering notation: 7 × 106 m In the unit: e6m Engineering notation can be entered as a "prefix" to the unit: {{convert|70|e6m}} → The same is possible for the output unit: {{convert|23,000,000|ft|e6m}} → Any standard unit (not a combination, multiple, or built-in unit) can have such a prefix: e3 (thousand), e6 (million), e9 (billion), e12 (trillion), e15 (quadrillion). Scientific notation: 1.23 × 10−14 In scientific notation, a number is written like Template:Rnd. The plain number has exactly one digit before the decimal point. With Template:Tlf, the input can be in e-notation such as 12.3e4. This value is displayed as a power of ten, and the output is displayed in scientific notation, except that an output value satisfying 0.01 <= v < 1000 is shown as a normal number. In addition, if the output value is 1000 and sigfig=4 is used, the value is displayed as a normal number. {{convert|12.3e-15|atm|atm|abbr=on}} → {{convert|0.00000005|atm|atm|abbr=on}} → Input with fractions: The number to convert can be written in fractions. Both / (keyboard slash) and ⁄ (fraction slash) are accepted: {{convert|1/2|in|mm|1}} → {{convert|1⁄2|in|mm|1}} → With positive mixed numbers (a positive integer and a fraction), use a + sign {{convert|2+1⁄2|in|mm|1}} → With negative mixed numbers, use a hyphen - and repeat it: {{convert|-2-1⁄2|in|mm|1}} → Note that the following cases are not interpreted as mixed numbers: {{convert|2-1⁄2|in|mm|1}} → . This is interpreted as a range from 2 inches to 1⁄2 inch. {{convert|-2+1⁄2|in|mm|1}} → Template:Nay This is neither a mixed number nor a range, and mathematical expressions requiring calculations are not allowed here. Horizontal fraction bar: Template:Sfrac inch Using a double slash (//) provides a horizontal fraction bar for the original (input) unit: {{convert|1//2|in|mm|1}} → {{convert|6+3//8|in|mm|1}} → Using a negative value for Template:Para provides a horizontal fraction bar for the converted (output) unit: {{convert|12.7|mm|frac=-2}} → {{convert|161.9|mm|frac=-8}} → Thousands separator: 1,000 mi or 1000 mi In input, a comma for thousands separator is accepted but not required; a gap (space) is not accepted. In output, by default, the thousand separator is the comma: {{convert|1234567|m|ft}} → {{convert|1,234,567|m|ft}} → Set Template:Para to remove the separator from the output: {{convert|1234567|m|ft|comma=off}} → Use Template:Para to use digit grouping by gap (thin space) as a thousands separator: {{convert|1234567|m|ft|comma=gaps}} → Default behaviour, for comparison: {{convert|1234567|m|ft}} → Setting Template:Para will only add the separator when the number of digits is 5 or more: {{convert|1234|m|ft|comma=5}} → {{convert|1234567|m|ft|comma=5}} → Default behaviour, for comparison: {{convert|1234|m|ft}} → Output manipulation Brackets and separators: 10 m [33 ft] Punctuation that distinguishes the two measurements is set by Template:Para. Options are: b (the default), sqbr, comma, or, br, x|…: {{convert|10|m|ft|disp=sqbr}} → {{convert|10|m|ft|disp=comma}} → {{convert|10|m|ft|disp=or}} → Default behaviour, for comparison: {{convert|10|m|ft}} → Setting Template:Para will force a new line (<br/>) {{convert|10|m|ft|disp=br}} → Also Template:Para will force a new line, and keep the brackets (useful in tables): {{convert|10|m|ft|disp=br()}} → Setting Template:Para allows any text as separator: {{convert|10|m|ft|disp=x|_MyText_}} → (To display spaces, use &nbsp;) Flipping (reordering) the two measurements: Setting Template:Para will flip (swap) the two measurements: {{convert|1|mi|m|order=flip}} → Default behaviour, for comparison: {{convert|1|mi|m}} → When converting to multiple units, the effect is: {{convert|10|km|mi nmi|order=flip}} → {{convert|10|km|nmi mi|order=flip}} → Fixed ordering of output units: Setting Template:Para shows the output-units as ordered; the input unit is skipped: {{convert|100|C|F C K|abbr=on|order=out}} → {{convert|200|PS|kW hp|0|abbr=on|order=out}} → See also: § Displaying parts of the output. Displaying parts of the result: It is possible to display only parts of the conversion result: Convert Output Returns {{convert|2|cuyd|m3}} Regular output (for comparison) {{convert|2|cuyd|m3|abbr=values}} Input and output numbers {{convert|2|cuyd|m3|disp=unit}} Input unit {{convert|2|cuyd|m3|disp=unit|adj=on}} Input unit, adjective (hyphenated) {{convert|2|cuyd|cuyd|disp=out}} Input (workaround. Template:Nowrap) {{convert|2|cuyd|m3|abbr=~}} Input: both name and symbol {{convert|2|cuyd|m3|disp=unit2}} Output unit (symbol) {{convert|2|cuyd|m3|disp=unit2|abbr=off}} Output unit (name) {{convert|2|cuyd|m3|disp=number}} Output value {{convert|2|cuyd|m3|disp=out}} Output value and unit name {{convert|2|cuyd|m3|disp=out|abbr=off}} Output value and unit symbol Display both input name and symbol: 2 kilopascals [kPa] Setting Template:Para returns both name and symbol of the first (input) unit: {{convert|2|kPa|psi|abbr=~}} → A {{convert|2|kPa|psi|abbr=~|adj=on}} pressure → Template:Nowrap Table options For the wikitable structure, there are three options: add a line-break, split the result over columns and make the table sortable. Enforced line break Template:Para adds a line-break and omits brackets. Template:Para adds a line-break and does add brackets to the converted value. This may be useful in tables: Template:Para Template:Para Table columns Using {convert} in a table cell, with Template:Para splits the result over two (or more) columns. By default units are not included in the table, however, they can be added using the Template:Para parameter. Multiple-unit outputs, like ftin, always output their units to the table. {{convert|10|m|ft|disp=table}} → Template:Para does the same, and also centers the text: {{convert|20|m|ft|disp=tablecen}} → The units are added as a column header:   kilograms pounds stone and pounds Template:Para Template:Para and Template:Para Template:Para and Template:Para Template:Para Template:Para (default) Sorting Use Template:Para to include a hidden numerical sortkey in the output, suitable for use in a table with sortable columns. Technically, this places a hidden string before the actual displayed values: {{convert|10|m|ft|sortable=on}} Template:Nowrap showing: . Use both Template:Para and Template:Para together to produce table columns (pipe symbols) for each value in sortable columns: m ft A B C D The generated sortkey is calculated in a consistent way based on both the value and its unit as passed to the convert template. In most cases convert uses the passed value converted to SI base units. It is therefore not necessarily the displayed value or other alternate units and is calculated regardless of output format options. Using different units or different order of units in individual rows should therefore not lead to incorrect sorting, although variations in rounding can give surprising results, since an unrounded number is used for the sortkey. Units The conversion factors and physical constants are sourced here. All units Template:Anchor'per' units: kg/hl, miles per gallon When using a slash (/), a unit like kg/hl is recognized as kilograms per hectolitre and will be converted with other mass/volume units. {{convert|1000|kg/hl}} → Population density (inhabitants per square mile) can be converted using {{convert|10|PD/sqmi|PD/km2}} → Vehicular fuel efficiency, commonly expressed in miles per gallon or litres per 100 km can also be converted {{convert|26|mpgUS|l/100km mpgimp}} → Template:AnchorUnits of difference: Expressing a change or difference in temperature We have already discussed standard temperature conversions (°C, °F, K), as shown in these two examples: {{#invoke:DemoTemplate|convert|10|C}} (standard temperature conversion) {{#invoke:DemoTemplate|convert|10–15|C}} (standard temperature range conversion) When expressing a temperature change (e.g., "The temperature increased by 10 °C"), or when comparing temperatures (e.g., "10 to 15 °C warmer"), we cannot use the standard temperature units (Template:Para, Template:Para and Template:Para), which refer to points on the respective scale. Instead, we must use one of the following "units of difference": Template:Para, Template:Para and Template:Para. Compare the following two examples with the two above: {{#invoke:DemoTemplate|convert|10|C-change}} increase in temperature {{#invoke:DemoTemplate|convert|10–15|C-change}} warmer than normal To produce multiple units in the output: {{#invoke:DemoTemplate|convert|10|C-change|F-change K-change}} difference Multiple units: 1 ft 5 in In input Base document Template:Slink lists options for multiple unit input (like ft,in). It can catch predefined sets only (units that can be subdivided; e.g., yd into ft): {{convert|1|yd|2|ft|3|in}} → {{convert|2|ft|3|in|cm}} → {{convert|1|lb|5|oz|g}} → In output Available multiple-unit output options predefined, like ftin and ydftin. The full list is at Template:Slink. {{convert|2|m|ftin}} → {{convert|2|m|ft in}} → , using a space, returns the decimal point Default behaviour, for comparison: {{convert|2|m}} → See also: Template:Tl a length used to measure horses Template:Tl a weight in ton, cwt, qr and lb Currency per unit: $/mi → $/km Using currency symbols in a $ per unit value, you can convert the per-unit: {{convert|10|$/mi|$/km}} → {{convert|1500|$/ozt|$/g}} → You can set the currency in both values using Template:Para: {{convert|10|$/mi|$/km|$=€}} → It is not possible to convert the currency. So, this result (mixed currencies) is not possible: Template:!mxt Template:Nay Using convert inside templates For usage in template code, like infoboxes, Template:Tlf has these options: Pre-formatting fraction input Module:Convert/helper can read regular input and pre-format it into Template:Tlf-accepted input. Your template can accept Template:Para and use {{#invoke:Convert/helper|number|16 7/8}} → {{#invoke:Convert/helper|number|16 7/8}} Using a Wikidata property Adding the Wikidata property code, like code Template:Para, to your template code automatically returns the Wikidata property for that article, and convert it. Both number and unit are read. Note: to return that property value for an other article, use Template:Para. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) {{convert|input=P2073|qid=Q1056131|ftin|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on|disp=out}} → For example see template:Infobox Telescope. Sometimes a property may have more than one value against it in Wikidata. You can use the Template:Para parameter to specify which of the values you want to use. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) Template:Wikidata entity link: {{convert|input=P2386|qual=Q613628|ft|abbr=on}} → Template:Wikidata entity link: {{convert|input=P2386|qual=Q1395645|ft|abbr=on}} → Parameter list Deprecated options TemplateData <templatedata> { "description": "Converts measurements to other units.", "params": { "1": { "label": "Value", "description": "The value to convert.", "type": "number", "required": true }, "2": { "label": "From unit", "description": "The unit for the provided value.", "type": "string", "example": "km", "required": true }, "3": { "label": "To units", "description": "The units to convert into. Separate units by a space for multiple outputs. In an output unit, use + for a multiplication space.", "type": "string", "example": "mi nmi", "suggested": true }, "4": { "label": "Precision or suffix", "description": "Significant digits after decimal dot or, if negative, exponent of ten.", "type": "number" }, "lk": { "label": "Link units", "description": "Indication of what units to apply wikilinks to. Use “on” for all, “in” for the input unit, “out” for the output units, or “off” for none of the units.", "default": "off", "type": "string", "example": "on" }, "abbr": { "label": "Abbreviation", "description": "Display for the units: “on” to display all units using their unit symbols, “off” to display all units in full words, “in” to display the unit symbol for the input unit, “out” to display the unit symbols for the output units, “unit” to display unit symbols for both input and output units when using scientific notation, “values” for no units at all (neither unit symbols nor full words of units).", "default": "out", "type": "string", "example": "on, unit, in, out, off", "suggested": true }, "sp": { "label": "Spelling", "description": "Spelling of units. Use “us” to display unit names using U.S. spelling.", "type": "string", "example": "us" }, "adj": { "label": "Adjective", "description": "Whether to use adjectival form. Use “on” for singular unit name appended by a hyphen, “mid” to put conversion at end, or “off” (default) for no adjectival form.", "type": "unbalanced-wikitext", "example": "on", "default": "off" }, "disp": { "label": "Conversion", "description": "Display conversion result: “or”: after ‘or’, “x”: with custom prefix and suffix, “b”: in parentheses, “table”/“tablecen”, “output only”: alone, “output number only”: alone and without unit, “unit”: not at all but input unit; if the value is a number it is used as precision.", "type": "string", "example": "b" }, "order": { "label": "Ordering", "description": "“flip” returns converted value first, input value second.", "type": "string", "example": "flip" }, "sigfig": { "label": "Significant figures", "description": "Indicates the number of significant figures to be used in rounding.", "type": "number" }, "round": { "label": "Rounding output", "description": "The type of rounding. “5” rounds the output number to nearest multiple of 5, “25” to nearest multiple of 25, “each” rounds each number in a range.", "type": "number" }, "comma": { "label": "Thousands separator", "description": "Sets or suppresses the use of thousands separators in the numbers. “off”: no separator; “gaps”: use space instead of comma as thousands separator; “5”: only add thousands separator when the integral part of the number uses 5 positions or more (10,000 or more; if using comma as thousands separator, 1234 would produce '1234', 12345 would produce '12,345').", "default": "on", "type": "string", "example": "off" }, "sortable": { "label": "Sort key", "description": "“on” generates a hidden sort key", "type": "string", "example": "on" }, "spell": { "label": "Spell numbers?", "description": "If used, spells input or input and output numbers in words, optionally capitalizing the first", "example": "'in', 'In', 'on', or 'On'", "type": "string" }, "sing": { "type": "string", "deprecated": "use adj=", "label": "Singular?", "description": "If 'yes', uses singular form of units (deprecated)", "example": "yes" }, "frac": { "label": "Fraction?", "description": "fraction as rounding unit", "type": "number" }, "$": { "label": "Currency symbol", "description": "sets currency symbol in both units", "example": "$=€ will show \" €10 per mile (€6.2/km)\"", "type": "string" }, "input": { "label": "WD property", "description": "Reads the property value of the item (article), then converts it", "example": " (P2046=area)", "type": "string" } }, "format": "inline" } </templatedata> See also Template:Temp Template:Temp Template:Temp to convert historical prices to their current equivalent. Template:Convert navs Template:Sandbox other at 5000 rpm	Template:Documentation subpage Template:Hatnote {{#ifeq:Engine|Template:Convert|Template:High-risk}} Template:Transwiki guide Template:Lua Template Template:Tl calculates from one measurement unit to another one, and then presents the results formatted. The complete list of unit symbols recognized by the template is at Module:Convert/documentation/conversion data. For example: {{convert|2|km|mi}} → (km entered, so converted into mile) {{convert|7|mi|km}} → (mi entered, so converted into km) Numbers can be rounded, units can be abbreviated into symbols: {{convert|2|km|mi|2|abbr=on}} → {{convert|7|mi|km|2|abbr=on}} → Value ranges can be entered using |to|... or |-|...: {{convert|2|to|5|km|mi}} → {{convert|2|-|5|km|mi}} → Combined effect example: {{convert|2|-|5|km|mi|2|abbr=on}} → {{convert|2|and|5|km|mi|sigfig=3|abbr=off}} → Units to convert Template:Hatnote Enter units to convert from into: {{convert|1|lb|kg}} → SI units generally accept prefixes, like "m" for milli (10−3), and "M" for mega (106) For "per" units, use "/" (slash): kg/ha For three-unit units, etc., see Template:Cl Unit name or symbol (abbreviation): 1 pound or 1 lb? By default, the first quantity shows the unit name, the second shows the symbol (or abbreviation): {{convert|1|lb|kg}} → Using Template:Para is the reverse behaviour to the default: {{convert|1|lb|kg|abbr=in}} → To abbreviate both or neither: {{convert|1|lb|kg|abbr=on}} → {{convert|1|lb|kg|abbr=off}} → Convenience: Template:Tlf has Template:Para by default Template Template:Tl is the same as Template:Tlf, except that it has Template:Para as the default behaviour. In Template:Tlf, all other options are available. So: {{cvt|1|lb|kg}} → Template:Cvt is equivalent to: {{convert|1|lb|kg|abbr=on}} → Template:Cvt Adjective: a 10-mile distance Use Template:Para to produce the adjectival (hyphenated) form: A {{convert|10|mi|km|adj=on}} distance → A distance. Default behaviour, for comparison: {{convert|10|mi|km}} to go → to go. Template:Para does not produce hyphens with unit symbols, as per Manual of Style: A {{convert|9|in|cm|adj=on|abbr=on}} nail → A nail. Template:AnchorRounding: 100 ft is 30 m or 30.5 m or 30.48 m? Template:Hatnote By definition, 100 ft equals . In practical use, it is common to round the calculated metric number. With that, there are several possibilities. Default rounding By Template:Tlf default, the conversion result will be rounded either to precision comparable to that of the input value (the number of digits after the decimal point—or the negative of the number of non-significant zeroes before the point—is increased by one if the conversion is a multiplication by a number between 0.02 and 0.2, remains the same if the factor is between 0.2 and 2, is decreased by 1 if it is between 2 and 20, and so on) or to two significant digits, whichever is more precise. An exception to this is rounding temperatures (see below). Examples of rounding Input Displays as Note {{convert|123|ft|m|-1}} {{convert|123|ft|m}} same output as with 0 (below) {{convert|123|ft|m|0}} {{convert|123|ft|m|1}} {{convert|123|ft|m|2}} The more-exact value is 37.4904 m or so, which gets converted to 37 m if this parameter is not specified at all. {{convert|500|ft|m|-1}} {{convert|500|ft|m}} same output as with −1 (above), because the conversion factor is between 0.2 and 2 (hence, it should produce same double-zero precision (−2) as in the input value), but the conversion must produce two significant digits at a minimum (hence, a higher single-zero precision (−1) is used) {{convert|500|ft|m|0}} {{convert|500|ft|m|1}} {{convert|500|ft|m|2}} exact value is 152.4 m {{convert|500|ft|cm|-3}} {{convert|500|ft|cm}} same output as with −3 (above), because the conversion factor is between 20 and 200 (hence, it should decrease input value's double-zero precision (−2) by 2), but the conversion must produce two significant digits at a minimum (hence, a higher triple-zero precision (−3) is used) {{convert|500|ft|cm|0}} Convert supports four types of rounding: Round to a given precision: use a precision number Specify the desired precision with the fourth unnamed parameter (or third unnamed parameter if the "convert to" parameter is omitted; or fifth unnamed parameter if a range is specified; or fourth unnamed parameter again if a range is specified and the "convert to" parameter is omitted; needs to be replaced with a "precision" named parameter). The conversion is rounded off to the nearest multiple of Template:Frac to the power of this number. For instance, if the result is 8621 and the round number is "-2", the result will be 8600. If the result is "234.0283043" and the round number is "0", the result will be 234. Round to a given number of significant figures: Template:Para To specify the output number to be with n significant figures use Template:Para: {{convert|1200|ft|m|sigfig=4}} → {{convert|1200|ft|m|sigfig=3}} → {{convert|1200|ft|m|sigfig=2}} → {{convert|1200|ft|m|sigfig=1}} → Default behaviour, for comparison: {{convert|1200|ft|m}} → Setting Template:Para to a value less than 1 is meaningless: {{convert|1200|ft|m|sigfig=0}} → Template:Nay Round to a multiple of 5: 15, 20, 25, ... Using Template:Para rounds the outcome to a multiple of 5. {{convert|10|m|ft}} → {{convert|10|m|ft|round=5}} → Similar: using Template:Para rounds the outcome to a multiple of 25. {{convert|10|m|ft}} → {{convert|10|m|ft|round=25}} → Default behaviour, for comparison: {{convert|10|m|ft|sigfig=4}} → In a range, one can round each value individually to the default. Use Template:Para: {{convert|10 x 200 x 3000|m|ft}} → {{convert|10 x 200 x 3000|m|ft|round=each}} → Round to a multiple of a given fraction: Template:Frac inch Specify the desired denominator using Template:Para. (Denominator is the below-the-slash number, for example the 3 in Template:Frac). {{convert|5.56|cm|in|frac=16}} → {{convert|8|cm|in|frac=4}} → The fraction is reduced when possible: {{convert|8|cm|in|frac=100}} → Default behaviour uses decimal notation: {{convert|5.56|cm|in}} → Template:AnchorRounding temperatures: °C, °F and K In temperatures, the conversion will be rounded either to the precision comparable to that of the input value or to that which would give three significant figures when expressed in kelvins, whichever is more precise. {{#invoke:DemoTemplate|convert|10,000|C|F K}} {{#invoke:DemoTemplate|convert|10,000.1|C|F K}} {{#invoke:DemoTemplate|convert|-272|C|F K}} {{#invoke:DemoTemplate|convert|-272|C}} {{#invoke:DemoTemplate|convert|100|C|F K}} {{#invoke:DemoTemplate|convert|0|C|F K}} The precision of the input number in example (1) is one digit, but the precision of its Kelvins expression is three, so the precision of the Fahrenheit conversion is made three (made 180...) . (1) and (2) seem to belie the fact that a , and make the 32 degrees difference shown in (1) begin to seem off somehow. Result (1) seems off until you set the significant figures yourself with Template:Para: {{#invoke:DemoTemplate|convert|10000|C|sigfig=5}} or you set the precision positionally, relative to the decimal point (zero being at the decimal point): {{#invoke:DemoTemplate|convert|10000|C|0}} The precision of the input number in example (2) is six, so the precision of the Fahrenheit output is, whereas before, Kelvins had determined it to be three. Examples (3) and (4) show how this can be hidden and generate questions, but it occurs there because the Kelvins conversion generated two fractional parts. (Before it was the input number that generated the fractional part.) In example (3) the three input digits converted into five significant output digits because of the two digits after the decimal point, generated by the Kelvins conversion. This happened again in (5), but in (6) decimal fractions were neither given as input nor induced by the Kelvins conversion. Rounding input There is limited support for rounding the displayed input number. The rounding takes place after conversion, so the output is based on the full-precision input. This is useful when the input is produced by Template:Tlc or otherwise available to a higher precision than is usefully displayed, and it's desirable to avoid double-rounding. To round the input to a specified number of digits after the decimal point, use one of the parameters: Template:Para Template:Para Template:Para Template:Para Note that there is no Template:ParaTemplate:Nay or similar for rounding above the decimal place. Neither is there support for significant figures, multiples of 5, or any other output-rounding feature. The default precision is computed based on the input, so an explicit output precision must usually be supplied: Template:Tlc → Template:Nay (precisions are mismatched) Template:Tlc → Template:Aye In this case, if the input were rounded before conversion, a different result would be obtained: Template:Tlc → Template:Nay (double rounding) Into multiple units: Separate the multiple output units by a space: {{convert|10|C|F K}} → {{convert|5|km|mi nmi}} → If the output unit names contain spaces, use + as the separator. See also: For multiple-unit options like 1 ft 5 in, see Template:Section link and Template:Section link. Ranges of values Template:For A range converts two values and separates them by your choice of words and punctuation. A range: 6 to 17 kg (13 to 37 lb) Range indicators are entered as the second parameter (between the values). Range separators can be: Template:Convert/doc/range separator list Multiple dimensions: Use by: {{convert|6|by|12|ft|m}} → Use ×, multiplication sign, or x, letter: {{convert|6|x|12|m|ft}} → In science, the formal way is to set |x| and Template:Para (keeping dimensions right, like in area = x km2): {{convert|6|x|12|m|ft|abbr=on}} → Lists of values: 20, 40, or 60 miles {{convert|20|,|40|, or|60|mi}} → About feet, inch in ranges and multiples While it is possible to enter feet, inch in a simple conversion, this is not possible for ranges: {{convert|1|ft|3|in|x|3|ft|5|in|mm}} → Template:Nay Default behaviour, for comparison: {{convert|1|ft|3|in|mm}} → However, converting metric units into feet and inches with Template:Para can produce the desired output: {{convert|380|x|1040|mm|ftin|order=flip}} → Words Spelling of unit name: international metre or US meter? Default spelling of units is in the en (generic) locale. To show en-US spelling, use Template:Para: {{convert|1|m|ft}} → —default {{convert|1|m|ft|sp=us}} → Spell out numbers: ten miles To write a number in words, use Template:Para: {{convert|10|mi|m|spell=in}} → To spell out both in and out values, use Template:Para: {{convert|10|mi|m|spell=on}} → To make first letter a capital, use Template:Para, Template:Para {{convert|10|mi|m|spell=In}} → {{convert|10|mi|m|spell=On}} → Remember that the spelling of the units (ft, m) is independently set by Template:Para. To the extreme: {{convert|10|mi|m|spell=on|abbr=off|sp=us}} → Inserted before units: 4 planted acres {{convert|4|acre||adj=pre|planted}} → disp=preunit is similar, but has no separator after the specified text, and can have different text for the output value: {{convert|4|acre||disp=preunit|planted }} → {{convert|4|acre||disp=preunit|planted |reforested-}} → After adjective unit: A corridor Note that two units (in this case, ft and m) are required. Use with just one unit will generate an error message. {{convert|10|ft|m|adj=mid|-long}} → Plurals: 1 inch, 2 inches The unit symbol is singular always. Depending on the preceding number only, a unit name can be shown plural. {{convert|1|metre}} → {{convert|2|metre}} → {{convert|2|metre|abbr=on}} → Exception Entering the unit spelled |foot| forces singular output "foot", whatever the number is. {{convert|100|foot|abbr=off}} → Fractions: one-eighth of an imperial pint The convert template also supports spelling out fractions. {{convert|3+1/2|oz|g|spell=in}} → Any additional words needed for the fraction can also be added at the end of the template. {{convert|1/8|imppt|ml|spell=in|adj=pre|of an}} → Wrapping and line breaking See Template:Section link Spelling out "thousands", "millions", etc. Most unit codes accept a prefix of e3 (thousand) or e6 (million) or e9 (billion). {{convert|100|e6mi|e6km}} → {{convert|120|e6acre}} → {{convert|120|e6acre|e3km2}} → To display both input and output in scientific notation, use Template:Para {{convert|100|e6mi|e6km|abbr=on}} → To spell out "thousands", "millions", etc., Template:Para abbreviates the unit; Template:Para displays both full unit names. {{convert|100|e6mi|e6km|abbr=unit}} → {{convert|100|e6mi|e6km|abbr=off}} → Numbers Using an SI prefix: gigametre (Gm), or micrometre (μm) Template:Sidebar metric prefixes (small) Units can have an SI prefix like G before the unit: Gm, and giga before the name: gigametre. These are plain multiplication factors. To illustrate, these are trivial calculations (from metre to metre), showing the multiplication factor: The prefix can be added before the SI unit (here: unit m for metre): {{convert|12|Gm|mi|abbr=on}} → Mm: km: mm: μm: um: (letter "u" can be used for "μ" here) The prefix can be used in the output unit: {{convert|12000|mi|Mm|abbr=on}} → {{convert|12|in|μm|abbr=on}} → As an exception, the non-SI unit "inch" can have the "μ" prefix too: {{convert|12|μm|μin|abbr=on}} → Engineering notation: 7 × 106 m In the unit: e6m Engineering notation can be entered as a "prefix" to the unit: {{convert|70|e6m}} → The same is possible for the output unit: {{convert|23,000,000|ft|e6m}} → Any standard unit (not a combination, multiple, or built-in unit) can have such a prefix: e3 (thousand), e6 (million), e9 (billion), e12 (trillion), e15 (quadrillion). Scientific notation: 1.23 × 10−14 In scientific notation, a number is written like Template:Rnd. The plain number has exactly one digit before the decimal point. With Template:Tlf, the input can be in e-notation such as 12.3e4. This value is displayed as a power of ten, and the output is displayed in scientific notation, except that an output value satisfying 0.01 <= v < 1000 is shown as a normal number. In addition, if the output value is 1000 and sigfig=4 is used, the value is displayed as a normal number. {{convert|12.3e-15|atm|atm|abbr=on}} → {{convert|0.00000005|atm|atm|abbr=on}} → Input with fractions: The number to convert can be written in fractions. Both / (keyboard slash) and ⁄ (fraction slash) are accepted: {{convert|1/2|in|mm|1}} → {{convert|1⁄2|in|mm|1}} → With positive mixed numbers (a positive integer and a fraction), use a + sign {{convert|2+1⁄2|in|mm|1}} → With negative mixed numbers, use a hyphen - and repeat it: {{convert|-2-1⁄2|in|mm|1}} → Note that the following cases are not interpreted as mixed numbers: {{convert|2-1⁄2|in|mm|1}} → . This is interpreted as a range from 2 inches to 1⁄2 inch. {{convert|-2+1⁄2|in|mm|1}} → Template:Nay This is neither a mixed number nor a range, and mathematical expressions requiring calculations are not allowed here. Horizontal fraction bar: Template:Sfrac inch Using a double slash (//) provides a horizontal fraction bar for the original (input) unit: {{convert|1//2|in|mm|1}} → {{convert|6+3//8|in|mm|1}} → Using a negative value for Template:Para provides a horizontal fraction bar for the converted (output) unit: {{convert|12.7|mm|frac=-2}} → {{convert|161.9|mm|frac=-8}} → Thousands separator: 1,000 mi or 1000 mi In input, a comma for thousands separator is accepted but not required; a gap (space) is not accepted. In output, by default, the thousand separator is the comma: {{convert|1234567|m|ft}} → {{convert|1,234,567|m|ft}} → Set Template:Para to remove the separator from the output: {{convert|1234567|m|ft|comma=off}} → Use Template:Para to use digit grouping by gap (thin space) as a thousands separator: {{convert|1234567|m|ft|comma=gaps}} → Default behaviour, for comparison: {{convert|1234567|m|ft}} → Setting Template:Para will only add the separator when the number of digits is 5 or more: {{convert|1234|m|ft|comma=5}} → {{convert|1234567|m|ft|comma=5}} → Default behaviour, for comparison: {{convert|1234|m|ft}} → Output manipulation Brackets and separators: 10 m [33 ft] Punctuation that distinguishes the two measurements is set by Template:Para. Options are: b (the default), sqbr, comma, or, br, x|…: {{convert|10|m|ft|disp=sqbr}} → {{convert|10|m|ft|disp=comma}} → {{convert|10|m|ft|disp=or}} → Default behaviour, for comparison: {{convert|10|m|ft}} → Setting Template:Para will force a new line (<br/>) {{convert|10|m|ft|disp=br}} → Also Template:Para will force a new line, and keep the brackets (useful in tables): {{convert|10|m|ft|disp=br()}} → Setting Template:Para allows any text as separator: {{convert|10|m|ft|disp=x|_MyText_}} → (To display spaces, use &nbsp;) Flipping (reordering) the two measurements: Setting Template:Para will flip (swap) the two measurements: {{convert|1|mi|m|order=flip}} → Default behaviour, for comparison: {{convert|1|mi|m}} → When converting to multiple units, the effect is: {{convert|10|km|mi nmi|order=flip}} → {{convert|10|km|nmi mi|order=flip}} → Fixed ordering of output units: Setting Template:Para shows the output-units as ordered; the input unit is skipped: {{convert|100|C|F C K|abbr=on|order=out}} → {{convert|200|PS|kW hp|0|abbr=on|order=out}} → See also: § Displaying parts of the output. Displaying parts of the result: It is possible to display only parts of the conversion result: Convert Output Returns {{convert|2|cuyd|m3}} Regular output (for comparison) {{convert|2|cuyd|m3|abbr=values}} Input and output numbers {{convert|2|cuyd|m3|disp=unit}} Input unit {{convert|2|cuyd|m3|disp=unit|adj=on}} Input unit, adjective (hyphenated) {{convert|2|cuyd|cuyd|disp=out}} Input (workaround. Template:Nowrap) {{convert|2|cuyd|m3|abbr=~}} Input: both name and symbol {{convert|2|cuyd|m3|disp=unit2}} Output unit (symbol) {{convert|2|cuyd|m3|disp=unit2|abbr=off}} Output unit (name) {{convert|2|cuyd|m3|disp=number}} Output value {{convert|2|cuyd|m3|disp=out}} Output value and unit name {{convert|2|cuyd|m3|disp=out|abbr=off}} Output value and unit symbol Display both input name and symbol: 2 kilopascals [kPa] Setting Template:Para returns both name and symbol of the first (input) unit: {{convert|2|kPa|psi|abbr=~}} → A {{convert|2|kPa|psi|abbr=~|adj=on}} pressure → Template:Nowrap Table options For the wikitable structure, there are three options: add a line-break, split the result over columns and make the table sortable. Enforced line break Template:Para adds a line-break and omits brackets. Template:Para adds a line-break and does add brackets to the converted value. This may be useful in tables: Template:Para Template:Para Table columns Using {convert} in a table cell, with Template:Para splits the result over two (or more) columns. By default units are not included in the table, however, they can be added using the Template:Para parameter. Multiple-unit outputs, like ftin, always output their units to the table. {{convert|10|m|ft|disp=table}} → Template:Para does the same, and also centers the text: {{convert|20|m|ft|disp=tablecen}} → The units are added as a column header:   kilograms pounds stone and pounds Template:Para Template:Para and Template:Para Template:Para and Template:Para Template:Para Template:Para (default) Sorting Use Template:Para to include a hidden numerical sortkey in the output, suitable for use in a table with sortable columns. Technically, this places a hidden string before the actual displayed values: {{convert|10|m|ft|sortable=on}} Template:Nowrap showing: . Use both Template:Para and Template:Para together to produce table columns (pipe symbols) for each value in sortable columns: m ft A B C D The generated sortkey is calculated in a consistent way based on both the value and its unit as passed to the convert template. In most cases convert uses the passed value converted to SI base units. It is therefore not necessarily the displayed value or other alternate units and is calculated regardless of output format options. Using different units or different order of units in individual rows should therefore not lead to incorrect sorting, although variations in rounding can give surprising results, since an unrounded number is used for the sortkey. Units The conversion factors and physical constants are sourced here. All units Template:Anchor'per' units: kg/hl, miles per gallon When using a slash (/), a unit like kg/hl is recognized as kilograms per hectolitre and will be converted with other mass/volume units. {{convert|1000|kg/hl}} → Population density (inhabitants per square mile) can be converted using {{convert|10|PD/sqmi|PD/km2}} → Vehicular fuel efficiency, commonly expressed in miles per gallon or litres per 100 km can also be converted {{convert|26|mpgUS|l/100km mpgimp}} → Template:AnchorUnits of difference: Expressing a change or difference in temperature We have already discussed standard temperature conversions (°C, °F, K), as shown in these two examples: {{#invoke:DemoTemplate|convert|10|C}} (standard temperature conversion) {{#invoke:DemoTemplate|convert|10–15|C}} (standard temperature range conversion) When expressing a temperature change (e.g., "The temperature increased by 10 °C"), or when comparing temperatures (e.g., "10 to 15 °C warmer"), we cannot use the standard temperature units (Template:Para, Template:Para and Template:Para), which refer to points on the respective scale. Instead, we must use one of the following "units of difference": Template:Para, Template:Para and Template:Para. Compare the following two examples with the two above: {{#invoke:DemoTemplate|convert|10|C-change}} increase in temperature {{#invoke:DemoTemplate|convert|10–15|C-change}} warmer than normal To produce multiple units in the output: {{#invoke:DemoTemplate|convert|10|C-change|F-change K-change}} difference Multiple units: 1 ft 5 in In input Base document Template:Slink lists options for multiple unit input (like ft,in). It can catch predefined sets only (units that can be subdivided; e.g., yd into ft): {{convert|1|yd|2|ft|3|in}} → {{convert|2|ft|3|in|cm}} → {{convert|1|lb|5|oz|g}} → In output Available multiple-unit output options predefined, like ftin and ydftin. The full list is at Template:Slink. {{convert|2|m|ftin}} → {{convert|2|m|ft in}} → , using a space, returns the decimal point Default behaviour, for comparison: {{convert|2|m}} → See also: Template:Tl a length used to measure horses Template:Tl a weight in ton, cwt, qr and lb Currency per unit: $/mi → $/km Using currency symbols in a $ per unit value, you can convert the per-unit: {{convert|10|$/mi|$/km}} → {{convert|1500|$/ozt|$/g}} → You can set the currency in both values using Template:Para: {{convert|10|$/mi|$/km|$=€}} → It is not possible to convert the currency. So, this result (mixed currencies) is not possible: Template:!mxt Template:Nay Using convert inside templates For usage in template code, like infoboxes, Template:Tlf has these options: Pre-formatting fraction input Module:Convert/helper can read regular input and pre-format it into Template:Tlf-accepted input. Your template can accept Template:Para and use {{#invoke:Convert/helper|number|16 7/8}} → {{#invoke:Convert/helper|number|16 7/8}} Using a Wikidata property Adding the Wikidata property code, like code Template:Para, to your template code automatically returns the Wikidata property for that article, and convert it. Both number and unit are read. Note: to return that property value for an other article, use Template:Para. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) {{convert|input=P2073|qid=Q1056131|ftin|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on|disp=out}} → For example see template:Infobox Telescope. Sometimes a property may have more than one value against it in Wikidata. You can use the Template:Para parameter to specify which of the values you want to use. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) Template:Wikidata entity link: {{convert|input=P2386|qual=Q613628|ft|abbr=on}} → Template:Wikidata entity link: {{convert|input=P2386|qual=Q1395645|ft|abbr=on}} → Parameter list Deprecated options TemplateData <templatedata> { "description": "Converts measurements to other units.", "params": { "1": { "label": "Value", "description": "The value to convert.", "type": "number", "required": true }, "2": { "label": "From unit", "description": "The unit for the provided value.", "type": "string", "example": "km", "required": true }, "3": { "label": "To units", "description": "The units to convert into. Separate units by a space for multiple outputs. In an output unit, use + for a multiplication space.", "type": "string", "example": "mi nmi", "suggested": true }, "4": { "label": "Precision or suffix", "description": "Significant digits after decimal dot or, if negative, exponent of ten.", "type": "number" }, "lk": { "label": "Link units", "description": "Indication of what units to apply wikilinks to. Use “on” for all, “in” for the input unit, “out” for the output units, or “off” for none of the units.", "default": "off", "type": "string", "example": "on" }, "abbr": { "label": "Abbreviation", "description": "Display for the units: “on” to display all units using their unit symbols, “off” to display all units in full words, “in” to display the unit symbol for the input unit, “out” to display the unit symbols for the output units, “unit” to display unit symbols for both input and output units when using scientific notation, “values” for no units at all (neither unit symbols nor full words of units).", "default": "out", "type": "string", "example": "on, unit, in, out, off", "suggested": true }, "sp": { "label": "Spelling", "description": "Spelling of units. Use “us” to display unit names using U.S. spelling.", "type": "string", "example": "us" }, "adj": { "label": "Adjective", "description": "Whether to use adjectival form. Use “on” for singular unit name appended by a hyphen, “mid” to put conversion at end, or “off” (default) for no adjectival form.", "type": "unbalanced-wikitext", "example": "on", "default": "off" }, "disp": { "label": "Conversion", "description": "Display conversion result: “or”: after ‘or’, “x”: with custom prefix and suffix, “b”: in parentheses, “table”/“tablecen”, “output only”: alone, “output number only”: alone and without unit, “unit”: not at all but input unit; if the value is a number it is used as precision.", "type": "string", "example": "b" }, "order": { "label": "Ordering", "description": "“flip” returns converted value first, input value second.", "type": "string", "example": "flip" }, "sigfig": { "label": "Significant figures", "description": "Indicates the number of significant figures to be used in rounding.", "type": "number" }, "round": { "label": "Rounding output", "description": "The type of rounding. “5” rounds the output number to nearest multiple of 5, “25” to nearest multiple of 25, “each” rounds each number in a range.", "type": "number" }, "comma": { "label": "Thousands separator", "description": "Sets or suppresses the use of thousands separators in the numbers. “off”: no separator; “gaps”: use space instead of comma as thousands separator; “5”: only add thousands separator when the integral part of the number uses 5 positions or more (10,000 or more; if using comma as thousands separator, 1234 would produce '1234', 12345 would produce '12,345').", "default": "on", "type": "string", "example": "off" }, "sortable": { "label": "Sort key", "description": "“on” generates a hidden sort key", "type": "string", "example": "on" }, "spell": { "label": "Spell numbers?", "description": "If used, spells input or input and output numbers in words, optionally capitalizing the first", "example": "'in', 'In', 'on', or 'On'", "type": "string" }, "sing": { "type": "string", "deprecated": "use adj=", "label": "Singular?", "description": "If 'yes', uses singular form of units (deprecated)", "example": "yes" }, "frac": { "label": "Fraction?", "description": "fraction as rounding unit", "type": "number" }, "$": { "label": "Currency symbol", "description": "sets currency symbol in both units", "example": "$=€ will show \" €10 per mile (€6.2/km)\"", "type": "string" }, "input": { "label": "WD property", "description": "Reads the property value of the item (article), then converts it", "example": " (P2046=area)", "type": "string" } }, "format": "inline" } </templatedata> See also Template:Temp Template:Temp Template:Temp to convert historical prices to their current equivalent. Template:Convert navs Template:Sandbox other at 2800 rpm
1962-1965	4-Barrel Carb	Template:Documentation subpage Template:Hatnote {{#ifeq:Engine|Template:Convert|Template:High-risk}} Template:Transwiki guide Template:Lua Template Template:Tl calculates from one measurement unit to another one, and then presents the results formatted. The complete list of unit symbols recognized by the template is at Module:Convert/documentation/conversion data. For example: {{convert|2|km|mi}} → (km entered, so converted into mile) {{convert|7|mi|km}} → (mi entered, so converted into km) Numbers can be rounded, units can be abbreviated into symbols: {{convert|2|km|mi|2|abbr=on}} → {{convert|7|mi|km|2|abbr=on}} → Value ranges can be entered using |to|... or |-|...: {{convert|2|to|5|km|mi}} → {{convert|2|-|5|km|mi}} → Combined effect example: {{convert|2|-|5|km|mi|2|abbr=on}} → {{convert|2|and|5|km|mi|sigfig=3|abbr=off}} → Units to convert Template:Hatnote Enter units to convert from into: {{convert|1|lb|kg}} → SI units generally accept prefixes, like "m" for milli (10−3), and "M" for mega (106) For "per" units, use "/" (slash): kg/ha For three-unit units, etc., see Template:Cl Unit name or symbol (abbreviation): 1 pound or 1 lb? By default, the first quantity shows the unit name, the second shows the symbol (or abbreviation): {{convert|1|lb|kg}} → Using Template:Para is the reverse behaviour to the default: {{convert|1|lb|kg|abbr=in}} → To abbreviate both or neither: {{convert|1|lb|kg|abbr=on}} → {{convert|1|lb|kg|abbr=off}} → Convenience: Template:Tlf has Template:Para by default Template Template:Tl is the same as Template:Tlf, except that it has Template:Para as the default behaviour. In Template:Tlf, all other options are available. So: {{cvt|1|lb|kg}} → Template:Cvt is equivalent to: {{convert|1|lb|kg|abbr=on}} → Template:Cvt Adjective: a 10-mile distance Use Template:Para to produce the adjectival (hyphenated) form: A {{convert|10|mi|km|adj=on}} distance → A distance. Default behaviour, for comparison: {{convert|10|mi|km}} to go → to go. Template:Para does not produce hyphens with unit symbols, as per Manual of Style: A {{convert|9|in|cm|adj=on|abbr=on}} nail → A nail. Template:AnchorRounding: 100 ft is 30 m or 30.5 m or 30.48 m? Template:Hatnote By definition, 100 ft equals . In practical use, it is common to round the calculated metric number. With that, there are several possibilities. Default rounding By Template:Tlf default, the conversion result will be rounded either to precision comparable to that of the input value (the number of digits after the decimal point—or the negative of the number of non-significant zeroes before the point—is increased by one if the conversion is a multiplication by a number between 0.02 and 0.2, remains the same if the factor is between 0.2 and 2, is decreased by 1 if it is between 2 and 20, and so on) or to two significant digits, whichever is more precise. An exception to this is rounding temperatures (see below). Examples of rounding Input Displays as Note {{convert|123|ft|m|-1}} {{convert|123|ft|m}} same output as with 0 (below) {{convert|123|ft|m|0}} {{convert|123|ft|m|1}} {{convert|123|ft|m|2}} The more-exact value is 37.4904 m or so, which gets converted to 37 m if this parameter is not specified at all. {{convert|500|ft|m|-1}} {{convert|500|ft|m}} same output as with −1 (above), because the conversion factor is between 0.2 and 2 (hence, it should produce same double-zero precision (−2) as in the input value), but the conversion must produce two significant digits at a minimum (hence, a higher single-zero precision (−1) is used) {{convert|500|ft|m|0}} {{convert|500|ft|m|1}} {{convert|500|ft|m|2}} exact value is 152.4 m {{convert|500|ft|cm|-3}} {{convert|500|ft|cm}} same output as with −3 (above), because the conversion factor is between 20 and 200 (hence, it should decrease input value's double-zero precision (−2) by 2), but the conversion must produce two significant digits at a minimum (hence, a higher triple-zero precision (−3) is used) {{convert|500|ft|cm|0}} Convert supports four types of rounding: Round to a given precision: use a precision number Specify the desired precision with the fourth unnamed parameter (or third unnamed parameter if the "convert to" parameter is omitted; or fifth unnamed parameter if a range is specified; or fourth unnamed parameter again if a range is specified and the "convert to" parameter is omitted; needs to be replaced with a "precision" named parameter). The conversion is rounded off to the nearest multiple of Template:Frac to the power of this number. For instance, if the result is 8621 and the round number is "-2", the result will be 8600. If the result is "234.0283043" and the round number is "0", the result will be 234. Round to a given number of significant figures: Template:Para To specify the output number to be with n significant figures use Template:Para: {{convert|1200|ft|m|sigfig=4}} → {{convert|1200|ft|m|sigfig=3}} → {{convert|1200|ft|m|sigfig=2}} → {{convert|1200|ft|m|sigfig=1}} → Default behaviour, for comparison: {{convert|1200|ft|m}} → Setting Template:Para to a value less than 1 is meaningless: {{convert|1200|ft|m|sigfig=0}} → Template:Nay Round to a multiple of 5: 15, 20, 25, ... Using Template:Para rounds the outcome to a multiple of 5. {{convert|10|m|ft}} → {{convert|10|m|ft|round=5}} → Similar: using Template:Para rounds the outcome to a multiple of 25. {{convert|10|m|ft}} → {{convert|10|m|ft|round=25}} → Default behaviour, for comparison: {{convert|10|m|ft|sigfig=4}} → In a range, one can round each value individually to the default. Use Template:Para: {{convert|10 x 200 x 3000|m|ft}} → {{convert|10 x 200 x 3000|m|ft|round=each}} → Round to a multiple of a given fraction: Template:Frac inch Specify the desired denominator using Template:Para. (Denominator is the below-the-slash number, for example the 3 in Template:Frac). {{convert|5.56|cm|in|frac=16}} → {{convert|8|cm|in|frac=4}} → The fraction is reduced when possible: {{convert|8|cm|in|frac=100}} → Default behaviour uses decimal notation: {{convert|5.56|cm|in}} → Template:AnchorRounding temperatures: °C, °F and K In temperatures, the conversion will be rounded either to the precision comparable to that of the input value or to that which would give three significant figures when expressed in kelvins, whichever is more precise. {{#invoke:DemoTemplate|convert|10,000|C|F K}} {{#invoke:DemoTemplate|convert|10,000.1|C|F K}} {{#invoke:DemoTemplate|convert|-272|C|F K}} {{#invoke:DemoTemplate|convert|-272|C}} {{#invoke:DemoTemplate|convert|100|C|F K}} {{#invoke:DemoTemplate|convert|0|C|F K}} The precision of the input number in example (1) is one digit, but the precision of its Kelvins expression is three, so the precision of the Fahrenheit conversion is made three (made 180...) . (1) and (2) seem to belie the fact that a , and make the 32 degrees difference shown in (1) begin to seem off somehow. Result (1) seems off until you set the significant figures yourself with Template:Para: {{#invoke:DemoTemplate|convert|10000|C|sigfig=5}} or you set the precision positionally, relative to the decimal point (zero being at the decimal point): {{#invoke:DemoTemplate|convert|10000|C|0}} The precision of the input number in example (2) is six, so the precision of the Fahrenheit output is, whereas before, Kelvins had determined it to be three. Examples (3) and (4) show how this can be hidden and generate questions, but it occurs there because the Kelvins conversion generated two fractional parts. (Before it was the input number that generated the fractional part.) In example (3) the three input digits converted into five significant output digits because of the two digits after the decimal point, generated by the Kelvins conversion. This happened again in (5), but in (6) decimal fractions were neither given as input nor induced by the Kelvins conversion. Rounding input There is limited support for rounding the displayed input number. The rounding takes place after conversion, so the output is based on the full-precision input. This is useful when the input is produced by Template:Tlc or otherwise available to a higher precision than is usefully displayed, and it's desirable to avoid double-rounding. To round the input to a specified number of digits after the decimal point, use one of the parameters: Template:Para Template:Para Template:Para Template:Para Note that there is no Template:ParaTemplate:Nay or similar for rounding above the decimal place. Neither is there support for significant figures, multiples of 5, or any other output-rounding feature. The default precision is computed based on the input, so an explicit output precision must usually be supplied: Template:Tlc → Template:Nay (precisions are mismatched) Template:Tlc → Template:Aye In this case, if the input were rounded before conversion, a different result would be obtained: Template:Tlc → Template:Nay (double rounding) Into multiple units: Separate the multiple output units by a space: {{convert|10|C|F K}} → {{convert|5|km|mi nmi}} → If the output unit names contain spaces, use + as the separator. See also: For multiple-unit options like 1 ft 5 in, see Template:Section link and Template:Section link. Ranges of values Template:For A range converts two values and separates them by your choice of words and punctuation. A range: 6 to 17 kg (13 to 37 lb) Range indicators are entered as the second parameter (between the values). Range separators can be: Template:Convert/doc/range separator list Multiple dimensions: Use by: {{convert|6|by|12|ft|m}} → Use ×, multiplication sign, or x, letter: {{convert|6|x|12|m|ft}} → In science, the formal way is to set |x| and Template:Para (keeping dimensions right, like in area = x km2): {{convert|6|x|12|m|ft|abbr=on}} → Lists of values: 20, 40, or 60 miles {{convert|20|,|40|, or|60|mi}} → About feet, inch in ranges and multiples While it is possible to enter feet, inch in a simple conversion, this is not possible for ranges: {{convert|1|ft|3|in|x|3|ft|5|in|mm}} → Template:Nay Default behaviour, for comparison: {{convert|1|ft|3|in|mm}} → However, converting metric units into feet and inches with Template:Para can produce the desired output: {{convert|380|x|1040|mm|ftin|order=flip}} → Words Spelling of unit name: international metre or US meter? Default spelling of units is in the en (generic) locale. To show en-US spelling, use Template:Para: {{convert|1|m|ft}} → —default {{convert|1|m|ft|sp=us}} → Spell out numbers: ten miles To write a number in words, use Template:Para: {{convert|10|mi|m|spell=in}} → To spell out both in and out values, use Template:Para: {{convert|10|mi|m|spell=on}} → To make first letter a capital, use Template:Para, Template:Para {{convert|10|mi|m|spell=In}} → {{convert|10|mi|m|spell=On}} → Remember that the spelling of the units (ft, m) is independently set by Template:Para. To the extreme: {{convert|10|mi|m|spell=on|abbr=off|sp=us}} → Inserted before units: 4 planted acres {{convert|4|acre||adj=pre|planted}} → disp=preunit is similar, but has no separator after the specified text, and can have different text for the output value: {{convert|4|acre||disp=preunit|planted }} → {{convert|4|acre||disp=preunit|planted |reforested-}} → After adjective unit: A corridor Note that two units (in this case, ft and m) are required. Use with just one unit will generate an error message. {{convert|10|ft|m|adj=mid|-long}} → Plurals: 1 inch, 2 inches The unit symbol is singular always. Depending on the preceding number only, a unit name can be shown plural. {{convert|1|metre}} → {{convert|2|metre}} → {{convert|2|metre|abbr=on}} → Exception Entering the unit spelled |foot| forces singular output "foot", whatever the number is. {{convert|100|foot|abbr=off}} → Fractions: one-eighth of an imperial pint The convert template also supports spelling out fractions. {{convert|3+1/2|oz|g|spell=in}} → Any additional words needed for the fraction can also be added at the end of the template. {{convert|1/8|imppt|ml|spell=in|adj=pre|of an}} → Wrapping and line breaking See Template:Section link Spelling out "thousands", "millions", etc. Most unit codes accept a prefix of e3 (thousand) or e6 (million) or e9 (billion). {{convert|100|e6mi|e6km}} → {{convert|120|e6acre}} → {{convert|120|e6acre|e3km2}} → To display both input and output in scientific notation, use Template:Para {{convert|100|e6mi|e6km|abbr=on}} → To spell out "thousands", "millions", etc., Template:Para abbreviates the unit; Template:Para displays both full unit names. {{convert|100|e6mi|e6km|abbr=unit}} → {{convert|100|e6mi|e6km|abbr=off}} → Numbers Using an SI prefix: gigametre (Gm), or micrometre (μm) Template:Sidebar metric prefixes (small) Units can have an SI prefix like G before the unit: Gm, and giga before the name: gigametre. These are plain multiplication factors. To illustrate, these are trivial calculations (from metre to metre), showing the multiplication factor: The prefix can be added before the SI unit (here: unit m for metre): {{convert|12|Gm|mi|abbr=on}} → Mm: km: mm: μm: um: (letter "u" can be used for "μ" here) The prefix can be used in the output unit: {{convert|12000|mi|Mm|abbr=on}} → {{convert|12|in|μm|abbr=on}} → As an exception, the non-SI unit "inch" can have the "μ" prefix too: {{convert|12|μm|μin|abbr=on}} → Engineering notation: 7 × 106 m In the unit: e6m Engineering notation can be entered as a "prefix" to the unit: {{convert|70|e6m}} → The same is possible for the output unit: {{convert|23,000,000|ft|e6m}} → Any standard unit (not a combination, multiple, or built-in unit) can have such a prefix: e3 (thousand), e6 (million), e9 (billion), e12 (trillion), e15 (quadrillion). Scientific notation: 1.23 × 10−14 In scientific notation, a number is written like Template:Rnd. The plain number has exactly one digit before the decimal point. With Template:Tlf, the input can be in e-notation such as 12.3e4. This value is displayed as a power of ten, and the output is displayed in scientific notation, except that an output value satisfying 0.01 <= v < 1000 is shown as a normal number. In addition, if the output value is 1000 and sigfig=4 is used, the value is displayed as a normal number. {{convert|12.3e-15|atm|atm|abbr=on}} → {{convert|0.00000005|atm|atm|abbr=on}} → Input with fractions: The number to convert can be written in fractions. Both / (keyboard slash) and ⁄ (fraction slash) are accepted: {{convert|1/2|in|mm|1}} → {{convert|1⁄2|in|mm|1}} → With positive mixed numbers (a positive integer and a fraction), use a + sign {{convert|2+1⁄2|in|mm|1}} → With negative mixed numbers, use a hyphen - and repeat it: {{convert|-2-1⁄2|in|mm|1}} → Note that the following cases are not interpreted as mixed numbers: {{convert|2-1⁄2|in|mm|1}} → . This is interpreted as a range from 2 inches to 1⁄2 inch. {{convert|-2+1⁄2|in|mm|1}} → Template:Nay This is neither a mixed number nor a range, and mathematical expressions requiring calculations are not allowed here. Horizontal fraction bar: Template:Sfrac inch Using a double slash (//) provides a horizontal fraction bar for the original (input) unit: {{convert|1//2|in|mm|1}} → {{convert|6+3//8|in|mm|1}} → Using a negative value for Template:Para provides a horizontal fraction bar for the converted (output) unit: {{convert|12.7|mm|frac=-2}} → {{convert|161.9|mm|frac=-8}} → Thousands separator: 1,000 mi or 1000 mi In input, a comma for thousands separator is accepted but not required; a gap (space) is not accepted. In output, by default, the thousand separator is the comma: {{convert|1234567|m|ft}} → {{convert|1,234,567|m|ft}} → Set Template:Para to remove the separator from the output: {{convert|1234567|m|ft|comma=off}} → Use Template:Para to use digit grouping by gap (thin space) as a thousands separator: {{convert|1234567|m|ft|comma=gaps}} → Default behaviour, for comparison: {{convert|1234567|m|ft}} → Setting Template:Para will only add the separator when the number of digits is 5 or more: {{convert|1234|m|ft|comma=5}} → {{convert|1234567|m|ft|comma=5}} → Default behaviour, for comparison: {{convert|1234|m|ft}} → Output manipulation Brackets and separators: 10 m [33 ft] Punctuation that distinguishes the two measurements is set by Template:Para. Options are: b (the default), sqbr, comma, or, br, x|…: {{convert|10|m|ft|disp=sqbr}} → {{convert|10|m|ft|disp=comma}} → {{convert|10|m|ft|disp=or}} → Default behaviour, for comparison: {{convert|10|m|ft}} → Setting Template:Para will force a new line (<br/>) {{convert|10|m|ft|disp=br}} → Also Template:Para will force a new line, and keep the brackets (useful in tables): {{convert|10|m|ft|disp=br()}} → Setting Template:Para allows any text as separator: {{convert|10|m|ft|disp=x|_MyText_}} → (To display spaces, use &nbsp;) Flipping (reordering) the two measurements: Setting Template:Para will flip (swap) the two measurements: {{convert|1|mi|m|order=flip}} → Default behaviour, for comparison: {{convert|1|mi|m}} → When converting to multiple units, the effect is: {{convert|10|km|mi nmi|order=flip}} → {{convert|10|km|nmi mi|order=flip}} → Fixed ordering of output units: Setting Template:Para shows the output-units as ordered; the input unit is skipped: {{convert|100|C|F C K|abbr=on|order=out}} → {{convert|200|PS|kW hp|0|abbr=on|order=out}} → See also: § Displaying parts of the output. Displaying parts of the result: It is possible to display only parts of the conversion result: Convert Output Returns {{convert|2|cuyd|m3}} Regular output (for comparison) {{convert|2|cuyd|m3|abbr=values}} Input and output numbers {{convert|2|cuyd|m3|disp=unit}} Input unit {{convert|2|cuyd|m3|disp=unit|adj=on}} Input unit, adjective (hyphenated) {{convert|2|cuyd|cuyd|disp=out}} Input (workaround. Template:Nowrap) {{convert|2|cuyd|m3|abbr=~}} Input: both name and symbol {{convert|2|cuyd|m3|disp=unit2}} Output unit (symbol) {{convert|2|cuyd|m3|disp=unit2|abbr=off}} Output unit (name) {{convert|2|cuyd|m3|disp=number}} Output value {{convert|2|cuyd|m3|disp=out}} Output value and unit name {{convert|2|cuyd|m3|disp=out|abbr=off}} Output value and unit symbol Display both input name and symbol: 2 kilopascals [kPa] Setting Template:Para returns both name and symbol of the first (input) unit: {{convert|2|kPa|psi|abbr=~}} → A {{convert|2|kPa|psi|abbr=~|adj=on}} pressure → Template:Nowrap Table options For the wikitable structure, there are three options: add a line-break, split the result over columns and make the table sortable. Enforced line break Template:Para adds a line-break and omits brackets. Template:Para adds a line-break and does add brackets to the converted value. This may be useful in tables: Template:Para Template:Para Table columns Using {convert} in a table cell, with Template:Para splits the result over two (or more) columns. By default units are not included in the table, however, they can be added using the Template:Para parameter. Multiple-unit outputs, like ftin, always output their units to the table. {{convert|10|m|ft|disp=table}} → Template:Para does the same, and also centers the text: {{convert|20|m|ft|disp=tablecen}} → The units are added as a column header:   kilograms pounds stone and pounds Template:Para Template:Para and Template:Para Template:Para and Template:Para Template:Para Template:Para (default) Sorting Use Template:Para to include a hidden numerical sortkey in the output, suitable for use in a table with sortable columns. Technically, this places a hidden string before the actual displayed values: {{convert|10|m|ft|sortable=on}} Template:Nowrap showing: . Use both Template:Para and Template:Para together to produce table columns (pipe symbols) for each value in sortable columns: m ft A B C D The generated sortkey is calculated in a consistent way based on both the value and its unit as passed to the convert template. In most cases convert uses the passed value converted to SI base units. It is therefore not necessarily the displayed value or other alternate units and is calculated regardless of output format options. Using different units or different order of units in individual rows should therefore not lead to incorrect sorting, although variations in rounding can give surprising results, since an unrounded number is used for the sortkey. Units The conversion factors and physical constants are sourced here. All units Template:Anchor'per' units: kg/hl, miles per gallon When using a slash (/), a unit like kg/hl is recognized as kilograms per hectolitre and will be converted with other mass/volume units. {{convert|1000|kg/hl}} → Population density (inhabitants per square mile) can be converted using {{convert|10|PD/sqmi|PD/km2}} → Vehicular fuel efficiency, commonly expressed in miles per gallon or litres per 100 km can also be converted {{convert|26|mpgUS|l/100km mpgimp}} → Template:AnchorUnits of difference: Expressing a change or difference in temperature We have already discussed standard temperature conversions (°C, °F, K), as shown in these two examples: {{#invoke:DemoTemplate|convert|10|C}} (standard temperature conversion) {{#invoke:DemoTemplate|convert|10–15|C}} (standard temperature range conversion) When expressing a temperature change (e.g., "The temperature increased by 10 °C"), or when comparing temperatures (e.g., "10 to 15 °C warmer"), we cannot use the standard temperature units (Template:Para, Template:Para and Template:Para), which refer to points on the respective scale. Instead, we must use one of the following "units of difference": Template:Para, Template:Para and Template:Para. Compare the following two examples with the two above: {{#invoke:DemoTemplate|convert|10|C-change}} increase in temperature {{#invoke:DemoTemplate|convert|10–15|C-change}} warmer than normal To produce multiple units in the output: {{#invoke:DemoTemplate|convert|10|C-change|F-change K-change}} difference Multiple units: 1 ft 5 in In input Base document Template:Slink lists options for multiple unit input (like ft,in). It can catch predefined sets only (units that can be subdivided; e.g., yd into ft): {{convert|1|yd|2|ft|3|in}} → {{convert|2|ft|3|in|cm}} → {{convert|1|lb|5|oz|g}} → In output Available multiple-unit output options predefined, like ftin and ydftin. The full list is at Template:Slink. {{convert|2|m|ftin}} → {{convert|2|m|ft in}} → , using a space, returns the decimal point Default behaviour, for comparison: {{convert|2|m}} → See also: Template:Tl a length used to measure horses Template:Tl a weight in ton, cwt, qr and lb Currency per unit: $/mi → $/km Using currency symbols in a $ per unit value, you can convert the per-unit: {{convert|10|$/mi|$/km}} → {{convert|1500|$/ozt|$/g}} → You can set the currency in both values using Template:Para: {{convert|10|$/mi|$/km|$=€}} → It is not possible to convert the currency. So, this result (mixed currencies) is not possible: Template:!mxt Template:Nay Using convert inside templates For usage in template code, like infoboxes, Template:Tlf has these options: Pre-formatting fraction input Module:Convert/helper can read regular input and pre-format it into Template:Tlf-accepted input. Your template can accept Template:Para and use {{#invoke:Convert/helper|number|16 7/8}} → {{#invoke:Convert/helper|number|16 7/8}} Using a Wikidata property Adding the Wikidata property code, like code Template:Para, to your template code automatically returns the Wikidata property for that article, and convert it. Both number and unit are read. Note: to return that property value for an other article, use Template:Para. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) {{convert|input=P2073|qid=Q1056131|ftin|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on|disp=out}} → For example see template:Infobox Telescope. Sometimes a property may have more than one value against it in Wikidata. You can use the Template:Para parameter to specify which of the values you want to use. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) Template:Wikidata entity link: {{convert|input=P2386|qual=Q613628|ft|abbr=on}} → Template:Wikidata entity link: {{convert|input=P2386|qual=Q1395645|ft|abbr=on}} → Parameter list Deprecated options TemplateData <templatedata> { "description": "Converts measurements to other units.", "params": { "1": { "label": "Value", "description": "The value to convert.", "type": "number", "required": true }, "2": { "label": "From unit", "description": "The unit for the provided value.", "type": "string", "example": "km", "required": true }, "3": { "label": "To units", "description": "The units to convert into. Separate units by a space for multiple outputs. In an output unit, use + for a multiplication space.", "type": "string", "example": "mi nmi", "suggested": true }, "4": { "label": "Precision or suffix", "description": "Significant digits after decimal dot or, if negative, exponent of ten.", "type": "number" }, "lk": { "label": "Link units", "description": "Indication of what units to apply wikilinks to. Use “on” for all, “in” for the input unit, “out” for the output units, or “off” for none of the units.", "default": "off", "type": "string", "example": "on" }, "abbr": { "label": "Abbreviation", "description": "Display for the units: “on” to display all units using their unit symbols, “off” to display all units in full words, “in” to display the unit symbol for the input unit, “out” to display the unit symbols for the output units, “unit” to display unit symbols for both input and output units when using scientific notation, “values” for no units at all (neither unit symbols nor full words of units).", "default": "out", "type": "string", "example": "on, unit, in, out, off", "suggested": true }, "sp": { "label": "Spelling", "description": "Spelling of units. Use “us” to display unit names using U.S. spelling.", "type": "string", "example": "us" }, "adj": { "label": "Adjective", "description": "Whether to use adjectival form. Use “on” for singular unit name appended by a hyphen, “mid” to put conversion at end, or “off” (default) for no adjectival form.", "type": "unbalanced-wikitext", "example": "on", "default": "off" }, "disp": { "label": "Conversion", "description": "Display conversion result: “or”: after ‘or’, “x”: with custom prefix and suffix, “b”: in parentheses, “table”/“tablecen”, “output only”: alone, “output number only”: alone and without unit, “unit”: not at all but input unit; if the value is a number it is used as precision.", "type": "string", "example": "b" }, "order": { "label": "Ordering", "description": "“flip” returns converted value first, input value second.", "type": "string", "example": "flip" }, "sigfig": { "label": "Significant figures", "description": "Indicates the number of significant figures to be used in rounding.", "type": "number" }, "round": { "label": "Rounding output", "description": "The type of rounding. “5” rounds the output number to nearest multiple of 5, “25” to nearest multiple of 25, “each” rounds each number in a range.", "type": "number" }, "comma": { "label": "Thousands separator", "description": "Sets or suppresses the use of thousands separators in the numbers. “off”: no separator; “gaps”: use space instead of comma as thousands separator; “5”: only add thousands separator when the integral part of the number uses 5 positions or more (10,000 or more; if using comma as thousands separator, 1234 would produce '1234', 12345 would produce '12,345').", "default": "on", "type": "string", "example": "off" }, "sortable": { "label": "Sort key", "description": "“on” generates a hidden sort key", "type": "string", "example": "on" }, "spell": { "label": "Spell numbers?", "description": "If used, spells input or input and output numbers in words, optionally capitalizing the first", "example": "'in', 'In', 'on', or 'On'", "type": "string" }, "sing": { "type": "string", "deprecated": "use adj=", "label": "Singular?", "description": "If 'yes', uses singular form of units (deprecated)", "example": "yes" }, "frac": { "label": "Fraction?", "description": "fraction as rounding unit", "type": "number" }, "$": { "label": "Currency symbol", "description": "sets currency symbol in both units", "example": "$=€ will show \" €10 per mile (€6.2/km)\"", "type": "string" }, "input": { "label": "WD property", "description": "Reads the property value of the item (article), then converts it", "example": " (P2046=area)", "type": "string" } }, "format": "inline" } </templatedata> See also Template:Temp Template:Temp Template:Temp to convert historical prices to their current equivalent. Template:Convert navs Template:Sandbox other at 4600 rpm	Template:Documentation subpage Template:Hatnote {{#ifeq:Engine|Template:Convert|Template:High-risk}} Template:Transwiki guide Template:Lua Template Template:Tl calculates from one measurement unit to another one, and then presents the results formatted. The complete list of unit symbols recognized by the template is at Module:Convert/documentation/conversion data. For example: {{convert|2|km|mi}} → (km entered, so converted into mile) {{convert|7|mi|km}} → (mi entered, so converted into km) Numbers can be rounded, units can be abbreviated into symbols: {{convert|2|km|mi|2|abbr=on}} → {{convert|7|mi|km|2|abbr=on}} → Value ranges can be entered using |to|... or |-|...: {{convert|2|to|5|km|mi}} → {{convert|2|-|5|km|mi}} → Combined effect example: {{convert|2|-|5|km|mi|2|abbr=on}} → {{convert|2|and|5|km|mi|sigfig=3|abbr=off}} → Units to convert Template:Hatnote Enter units to convert from into: {{convert|1|lb|kg}} → SI units generally accept prefixes, like "m" for milli (10−3), and "M" for mega (106) For "per" units, use "/" (slash): kg/ha For three-unit units, etc., see Template:Cl Unit name or symbol (abbreviation): 1 pound or 1 lb? By default, the first quantity shows the unit name, the second shows the symbol (or abbreviation): {{convert|1|lb|kg}} → Using Template:Para is the reverse behaviour to the default: {{convert|1|lb|kg|abbr=in}} → To abbreviate both or neither: {{convert|1|lb|kg|abbr=on}} → {{convert|1|lb|kg|abbr=off}} → Convenience: Template:Tlf has Template:Para by default Template Template:Tl is the same as Template:Tlf, except that it has Template:Para as the default behaviour. In Template:Tlf, all other options are available. So: {{cvt|1|lb|kg}} → Template:Cvt is equivalent to: {{convert|1|lb|kg|abbr=on}} → Template:Cvt Adjective: a 10-mile distance Use Template:Para to produce the adjectival (hyphenated) form: A {{convert|10|mi|km|adj=on}} distance → A distance. Default behaviour, for comparison: {{convert|10|mi|km}} to go → to go. Template:Para does not produce hyphens with unit symbols, as per Manual of Style: A {{convert|9|in|cm|adj=on|abbr=on}} nail → A nail. Template:AnchorRounding: 100 ft is 30 m or 30.5 m or 30.48 m? Template:Hatnote By definition, 100 ft equals . In practical use, it is common to round the calculated metric number. With that, there are several possibilities. Default rounding By Template:Tlf default, the conversion result will be rounded either to precision comparable to that of the input value (the number of digits after the decimal point—or the negative of the number of non-significant zeroes before the point—is increased by one if the conversion is a multiplication by a number between 0.02 and 0.2, remains the same if the factor is between 0.2 and 2, is decreased by 1 if it is between 2 and 20, and so on) or to two significant digits, whichever is more precise. An exception to this is rounding temperatures (see below). Examples of rounding Input Displays as Note {{convert|123|ft|m|-1}} {{convert|123|ft|m}} same output as with 0 (below) {{convert|123|ft|m|0}} {{convert|123|ft|m|1}} {{convert|123|ft|m|2}} The more-exact value is 37.4904 m or so, which gets converted to 37 m if this parameter is not specified at all. {{convert|500|ft|m|-1}} {{convert|500|ft|m}} same output as with −1 (above), because the conversion factor is between 0.2 and 2 (hence, it should produce same double-zero precision (−2) as in the input value), but the conversion must produce two significant digits at a minimum (hence, a higher single-zero precision (−1) is used) {{convert|500|ft|m|0}} {{convert|500|ft|m|1}} {{convert|500|ft|m|2}} exact value is 152.4 m {{convert|500|ft|cm|-3}} {{convert|500|ft|cm}} same output as with −3 (above), because the conversion factor is between 20 and 200 (hence, it should decrease input value's double-zero precision (−2) by 2), but the conversion must produce two significant digits at a minimum (hence, a higher triple-zero precision (−3) is used) {{convert|500|ft|cm|0}} Convert supports four types of rounding: Round to a given precision: use a precision number Specify the desired precision with the fourth unnamed parameter (or third unnamed parameter if the "convert to" parameter is omitted; or fifth unnamed parameter if a range is specified; or fourth unnamed parameter again if a range is specified and the "convert to" parameter is omitted; needs to be replaced with a "precision" named parameter). The conversion is rounded off to the nearest multiple of Template:Frac to the power of this number. For instance, if the result is 8621 and the round number is "-2", the result will be 8600. If the result is "234.0283043" and the round number is "0", the result will be 234. Round to a given number of significant figures: Template:Para To specify the output number to be with n significant figures use Template:Para: {{convert|1200|ft|m|sigfig=4}} → {{convert|1200|ft|m|sigfig=3}} → {{convert|1200|ft|m|sigfig=2}} → {{convert|1200|ft|m|sigfig=1}} → Default behaviour, for comparison: {{convert|1200|ft|m}} → Setting Template:Para to a value less than 1 is meaningless: {{convert|1200|ft|m|sigfig=0}} → Template:Nay Round to a multiple of 5: 15, 20, 25, ... Using Template:Para rounds the outcome to a multiple of 5. {{convert|10|m|ft}} → {{convert|10|m|ft|round=5}} → Similar: using Template:Para rounds the outcome to a multiple of 25. {{convert|10|m|ft}} → {{convert|10|m|ft|round=25}} → Default behaviour, for comparison: {{convert|10|m|ft|sigfig=4}} → In a range, one can round each value individually to the default. Use Template:Para: {{convert|10 x 200 x 3000|m|ft}} → {{convert|10 x 200 x 3000|m|ft|round=each}} → Round to a multiple of a given fraction: Template:Frac inch Specify the desired denominator using Template:Para. (Denominator is the below-the-slash number, for example the 3 in Template:Frac). {{convert|5.56|cm|in|frac=16}} → {{convert|8|cm|in|frac=4}} → The fraction is reduced when possible: {{convert|8|cm|in|frac=100}} → Default behaviour uses decimal notation: {{convert|5.56|cm|in}} → Template:AnchorRounding temperatures: °C, °F and K In temperatures, the conversion will be rounded either to the precision comparable to that of the input value or to that which would give three significant figures when expressed in kelvins, whichever is more precise. {{#invoke:DemoTemplate|convert|10,000|C|F K}} {{#invoke:DemoTemplate|convert|10,000.1|C|F K}} {{#invoke:DemoTemplate|convert|-272|C|F K}} {{#invoke:DemoTemplate|convert|-272|C}} {{#invoke:DemoTemplate|convert|100|C|F K}} {{#invoke:DemoTemplate|convert|0|C|F K}} The precision of the input number in example (1) is one digit, but the precision of its Kelvins expression is three, so the precision of the Fahrenheit conversion is made three (made 180...) . (1) and (2) seem to belie the fact that a , and make the 32 degrees difference shown in (1) begin to seem off somehow. Result (1) seems off until you set the significant figures yourself with Template:Para: {{#invoke:DemoTemplate|convert|10000|C|sigfig=5}} or you set the precision positionally, relative to the decimal point (zero being at the decimal point): {{#invoke:DemoTemplate|convert|10000|C|0}} The precision of the input number in example (2) is six, so the precision of the Fahrenheit output is, whereas before, Kelvins had determined it to be three. Examples (3) and (4) show how this can be hidden and generate questions, but it occurs there because the Kelvins conversion generated two fractional parts. (Before it was the input number that generated the fractional part.) In example (3) the three input digits converted into five significant output digits because of the two digits after the decimal point, generated by the Kelvins conversion. This happened again in (5), but in (6) decimal fractions were neither given as input nor induced by the Kelvins conversion. Rounding input There is limited support for rounding the displayed input number. The rounding takes place after conversion, so the output is based on the full-precision input. This is useful when the input is produced by Template:Tlc or otherwise available to a higher precision than is usefully displayed, and it's desirable to avoid double-rounding. To round the input to a specified number of digits after the decimal point, use one of the parameters: Template:Para Template:Para Template:Para Template:Para Note that there is no Template:ParaTemplate:Nay or similar for rounding above the decimal place. Neither is there support for significant figures, multiples of 5, or any other output-rounding feature. The default precision is computed based on the input, so an explicit output precision must usually be supplied: Template:Tlc → Template:Nay (precisions are mismatched) Template:Tlc → Template:Aye In this case, if the input were rounded before conversion, a different result would be obtained: Template:Tlc → Template:Nay (double rounding) Into multiple units: Separate the multiple output units by a space: {{convert|10|C|F K}} → {{convert|5|km|mi nmi}} → If the output unit names contain spaces, use + as the separator. See also: For multiple-unit options like 1 ft 5 in, see Template:Section link and Template:Section link. Ranges of values Template:For A range converts two values and separates them by your choice of words and punctuation. A range: 6 to 17 kg (13 to 37 lb) Range indicators are entered as the second parameter (between the values). Range separators can be: Template:Convert/doc/range separator list Multiple dimensions: Use by: {{convert|6|by|12|ft|m}} → Use ×, multiplication sign, or x, letter: {{convert|6|x|12|m|ft}} → In science, the formal way is to set |x| and Template:Para (keeping dimensions right, like in area = x km2): {{convert|6|x|12|m|ft|abbr=on}} → Lists of values: 20, 40, or 60 miles {{convert|20|,|40|, or|60|mi}} → About feet, inch in ranges and multiples While it is possible to enter feet, inch in a simple conversion, this is not possible for ranges: {{convert|1|ft|3|in|x|3|ft|5|in|mm}} → Template:Nay Default behaviour, for comparison: {{convert|1|ft|3|in|mm}} → However, converting metric units into feet and inches with Template:Para can produce the desired output: {{convert|380|x|1040|mm|ftin|order=flip}} → Words Spelling of unit name: international metre or US meter? Default spelling of units is in the en (generic) locale. To show en-US spelling, use Template:Para: {{convert|1|m|ft}} → —default {{convert|1|m|ft|sp=us}} → Spell out numbers: ten miles To write a number in words, use Template:Para: {{convert|10|mi|m|spell=in}} → To spell out both in and out values, use Template:Para: {{convert|10|mi|m|spell=on}} → To make first letter a capital, use Template:Para, Template:Para {{convert|10|mi|m|spell=In}} → {{convert|10|mi|m|spell=On}} → Remember that the spelling of the units (ft, m) is independently set by Template:Para. To the extreme: {{convert|10|mi|m|spell=on|abbr=off|sp=us}} → Inserted before units: 4 planted acres {{convert|4|acre||adj=pre|planted}} → disp=preunit is similar, but has no separator after the specified text, and can have different text for the output value: {{convert|4|acre||disp=preunit|planted }} → {{convert|4|acre||disp=preunit|planted |reforested-}} → After adjective unit: A corridor Note that two units (in this case, ft and m) are required. Use with just one unit will generate an error message. {{convert|10|ft|m|adj=mid|-long}} → Plurals: 1 inch, 2 inches The unit symbol is singular always. Depending on the preceding number only, a unit name can be shown plural. {{convert|1|metre}} → {{convert|2|metre}} → {{convert|2|metre|abbr=on}} → Exception Entering the unit spelled |foot| forces singular output "foot", whatever the number is. {{convert|100|foot|abbr=off}} → Fractions: one-eighth of an imperial pint The convert template also supports spelling out fractions. {{convert|3+1/2|oz|g|spell=in}} → Any additional words needed for the fraction can also be added at the end of the template. {{convert|1/8|imppt|ml|spell=in|adj=pre|of an}} → Wrapping and line breaking See Template:Section link Spelling out "thousands", "millions", etc. Most unit codes accept a prefix of e3 (thousand) or e6 (million) or e9 (billion). {{convert|100|e6mi|e6km}} → {{convert|120|e6acre}} → {{convert|120|e6acre|e3km2}} → To display both input and output in scientific notation, use Template:Para {{convert|100|e6mi|e6km|abbr=on}} → To spell out "thousands", "millions", etc., Template:Para abbreviates the unit; Template:Para displays both full unit names. {{convert|100|e6mi|e6km|abbr=unit}} → {{convert|100|e6mi|e6km|abbr=off}} → Numbers Using an SI prefix: gigametre (Gm), or micrometre (μm) Template:Sidebar metric prefixes (small) Units can have an SI prefix like G before the unit: Gm, and giga before the name: gigametre. These are plain multiplication factors. To illustrate, these are trivial calculations (from metre to metre), showing the multiplication factor: The prefix can be added before the SI unit (here: unit m for metre): {{convert|12|Gm|mi|abbr=on}} → Mm: km: mm: μm: um: (letter "u" can be used for "μ" here) The prefix can be used in the output unit: {{convert|12000|mi|Mm|abbr=on}} → {{convert|12|in|μm|abbr=on}} → As an exception, the non-SI unit "inch" can have the "μ" prefix too: {{convert|12|μm|μin|abbr=on}} → Engineering notation: 7 × 106 m In the unit: e6m Engineering notation can be entered as a "prefix" to the unit: {{convert|70|e6m}} → The same is possible for the output unit: {{convert|23,000,000|ft|e6m}} → Any standard unit (not a combination, multiple, or built-in unit) can have such a prefix: e3 (thousand), e6 (million), e9 (billion), e12 (trillion), e15 (quadrillion). Scientific notation: 1.23 × 10−14 In scientific notation, a number is written like Template:Rnd. The plain number has exactly one digit before the decimal point. With Template:Tlf, the input can be in e-notation such as 12.3e4. This value is displayed as a power of ten, and the output is displayed in scientific notation, except that an output value satisfying 0.01 <= v < 1000 is shown as a normal number. In addition, if the output value is 1000 and sigfig=4 is used, the value is displayed as a normal number. {{convert|12.3e-15|atm|atm|abbr=on}} → {{convert|0.00000005|atm|atm|abbr=on}} → Input with fractions: The number to convert can be written in fractions. Both / (keyboard slash) and ⁄ (fraction slash) are accepted: {{convert|1/2|in|mm|1}} → {{convert|1⁄2|in|mm|1}} → With positive mixed numbers (a positive integer and a fraction), use a + sign {{convert|2+1⁄2|in|mm|1}} → With negative mixed numbers, use a hyphen - and repeat it: {{convert|-2-1⁄2|in|mm|1}} → Note that the following cases are not interpreted as mixed numbers: {{convert|2-1⁄2|in|mm|1}} → . This is interpreted as a range from 2 inches to 1⁄2 inch. {{convert|-2+1⁄2|in|mm|1}} → Template:Nay This is neither a mixed number nor a range, and mathematical expressions requiring calculations are not allowed here. Horizontal fraction bar: Template:Sfrac inch Using a double slash (//) provides a horizontal fraction bar for the original (input) unit: {{convert|1//2|in|mm|1}} → {{convert|6+3//8|in|mm|1}} → Using a negative value for Template:Para provides a horizontal fraction bar for the converted (output) unit: {{convert|12.7|mm|frac=-2}} → {{convert|161.9|mm|frac=-8}} → Thousands separator: 1,000 mi or 1000 mi In input, a comma for thousands separator is accepted but not required; a gap (space) is not accepted. In output, by default, the thousand separator is the comma: {{convert|1234567|m|ft}} → {{convert|1,234,567|m|ft}} → Set Template:Para to remove the separator from the output: {{convert|1234567|m|ft|comma=off}} → Use Template:Para to use digit grouping by gap (thin space) as a thousands separator: {{convert|1234567|m|ft|comma=gaps}} → Default behaviour, for comparison: {{convert|1234567|m|ft}} → Setting Template:Para will only add the separator when the number of digits is 5 or more: {{convert|1234|m|ft|comma=5}} → {{convert|1234567|m|ft|comma=5}} → Default behaviour, for comparison: {{convert|1234|m|ft}} → Output manipulation Brackets and separators: 10 m [33 ft] Punctuation that distinguishes the two measurements is set by Template:Para. Options are: b (the default), sqbr, comma, or, br, x|…: {{convert|10|m|ft|disp=sqbr}} → {{convert|10|m|ft|disp=comma}} → {{convert|10|m|ft|disp=or}} → Default behaviour, for comparison: {{convert|10|m|ft}} → Setting Template:Para will force a new line (<br/>) {{convert|10|m|ft|disp=br}} → Also Template:Para will force a new line, and keep the brackets (useful in tables): {{convert|10|m|ft|disp=br()}} → Setting Template:Para allows any text as separator: {{convert|10|m|ft|disp=x|_MyText_}} → (To display spaces, use &nbsp;) Flipping (reordering) the two measurements: Setting Template:Para will flip (swap) the two measurements: {{convert|1|mi|m|order=flip}} → Default behaviour, for comparison: {{convert|1|mi|m}} → When converting to multiple units, the effect is: {{convert|10|km|mi nmi|order=flip}} → {{convert|10|km|nmi mi|order=flip}} → Fixed ordering of output units: Setting Template:Para shows the output-units as ordered; the input unit is skipped: {{convert|100|C|F C K|abbr=on|order=out}} → {{convert|200|PS|kW hp|0|abbr=on|order=out}} → See also: § Displaying parts of the output. Displaying parts of the result: It is possible to display only parts of the conversion result: Convert Output Returns {{convert|2|cuyd|m3}} Regular output (for comparison) {{convert|2|cuyd|m3|abbr=values}} Input and output numbers {{convert|2|cuyd|m3|disp=unit}} Input unit {{convert|2|cuyd|m3|disp=unit|adj=on}} Input unit, adjective (hyphenated) {{convert|2|cuyd|cuyd|disp=out}} Input (workaround. Template:Nowrap) {{convert|2|cuyd|m3|abbr=~}} Input: both name and symbol {{convert|2|cuyd|m3|disp=unit2}} Output unit (symbol) {{convert|2|cuyd|m3|disp=unit2|abbr=off}} Output unit (name) {{convert|2|cuyd|m3|disp=number}} Output value {{convert|2|cuyd|m3|disp=out}} Output value and unit name {{convert|2|cuyd|m3|disp=out|abbr=off}} Output value and unit symbol Display both input name and symbol: 2 kilopascals [kPa] Setting Template:Para returns both name and symbol of the first (input) unit: {{convert|2|kPa|psi|abbr=~}} → A {{convert|2|kPa|psi|abbr=~|adj=on}} pressure → Template:Nowrap Table options For the wikitable structure, there are three options: add a line-break, split the result over columns and make the table sortable. Enforced line break Template:Para adds a line-break and omits brackets. Template:Para adds a line-break and does add brackets to the converted value. This may be useful in tables: Template:Para Template:Para Table columns Using {convert} in a table cell, with Template:Para splits the result over two (or more) columns. By default units are not included in the table, however, they can be added using the Template:Para parameter. Multiple-unit outputs, like ftin, always output their units to the table. {{convert|10|m|ft|disp=table}} → Template:Para does the same, and also centers the text: {{convert|20|m|ft|disp=tablecen}} → The units are added as a column header:   kilograms pounds stone and pounds Template:Para Template:Para and Template:Para Template:Para and Template:Para Template:Para Template:Para (default) Sorting Use Template:Para to include a hidden numerical sortkey in the output, suitable for use in a table with sortable columns. Technically, this places a hidden string before the actual displayed values: {{convert|10|m|ft|sortable=on}} Template:Nowrap showing: . Use both Template:Para and Template:Para together to produce table columns (pipe symbols) for each value in sortable columns: m ft A B C D The generated sortkey is calculated in a consistent way based on both the value and its unit as passed to the convert template. In most cases convert uses the passed value converted to SI base units. It is therefore not necessarily the displayed value or other alternate units and is calculated regardless of output format options. Using different units or different order of units in individual rows should therefore not lead to incorrect sorting, although variations in rounding can give surprising results, since an unrounded number is used for the sortkey. Units The conversion factors and physical constants are sourced here. All units Template:Anchor'per' units: kg/hl, miles per gallon When using a slash (/), a unit like kg/hl is recognized as kilograms per hectolitre and will be converted with other mass/volume units. {{convert|1000|kg/hl}} → Population density (inhabitants per square mile) can be converted using {{convert|10|PD/sqmi|PD/km2}} → Vehicular fuel efficiency, commonly expressed in miles per gallon or litres per 100 km can also be converted {{convert|26|mpgUS|l/100km mpgimp}} → Template:AnchorUnits of difference: Expressing a change or difference in temperature We have already discussed standard temperature conversions (°C, °F, K), as shown in these two examples: {{#invoke:DemoTemplate|convert|10|C}} (standard temperature conversion) {{#invoke:DemoTemplate|convert|10–15|C}} (standard temperature range conversion) When expressing a temperature change (e.g., "The temperature increased by 10 °C"), or when comparing temperatures (e.g., "10 to 15 °C warmer"), we cannot use the standard temperature units (Template:Para, Template:Para and Template:Para), which refer to points on the respective scale. Instead, we must use one of the following "units of difference": Template:Para, Template:Para and Template:Para. Compare the following two examples with the two above: {{#invoke:DemoTemplate|convert|10|C-change}} increase in temperature {{#invoke:DemoTemplate|convert|10–15|C-change}} warmer than normal To produce multiple units in the output: {{#invoke:DemoTemplate|convert|10|C-change|F-change K-change}} difference Multiple units: 1 ft 5 in In input Base document Template:Slink lists options for multiple unit input (like ft,in). It can catch predefined sets only (units that can be subdivided; e.g., yd into ft): {{convert|1|yd|2|ft|3|in}} → {{convert|2|ft|3|in|cm}} → {{convert|1|lb|5|oz|g}} → In output Available multiple-unit output options predefined, like ftin and ydftin. The full list is at Template:Slink. {{convert|2|m|ftin}} → {{convert|2|m|ft in}} → , using a space, returns the decimal point Default behaviour, for comparison: {{convert|2|m}} → See also: Template:Tl a length used to measure horses Template:Tl a weight in ton, cwt, qr and lb Currency per unit: $/mi → $/km Using currency symbols in a $ per unit value, you can convert the per-unit: {{convert|10|$/mi|$/km}} → {{convert|1500|$/ozt|$/g}} → You can set the currency in both values using Template:Para: {{convert|10|$/mi|$/km|$=€}} → It is not possible to convert the currency. So, this result (mixed currencies) is not possible: Template:!mxt Template:Nay Using convert inside templates For usage in template code, like infoboxes, Template:Tlf has these options: Pre-formatting fraction input Module:Convert/helper can read regular input and pre-format it into Template:Tlf-accepted input. Your template can accept Template:Para and use {{#invoke:Convert/helper|number|16 7/8}} → {{#invoke:Convert/helper|number|16 7/8}} Using a Wikidata property Adding the Wikidata property code, like code Template:Para, to your template code automatically returns the Wikidata property for that article, and convert it. Both number and unit are read. Note: to return that property value for an other article, use Template:Para. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) {{convert|input=P2073|qid=Q1056131|ftin|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on|disp=out}} → For example see template:Infobox Telescope. Sometimes a property may have more than one value against it in Wikidata. You can use the Template:Para parameter to specify which of the values you want to use. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) Template:Wikidata entity link: {{convert|input=P2386|qual=Q613628|ft|abbr=on}} → Template:Wikidata entity link: {{convert|input=P2386|qual=Q1395645|ft|abbr=on}} → Parameter list Deprecated options TemplateData <templatedata> { "description": "Converts measurements to other units.", "params": { "1": { "label": "Value", "description": "The value to convert.", "type": "number", "required": true }, "2": { "label": "From unit", "description": "The unit for the provided value.", "type": "string", "example": "km", "required": true }, "3": { "label": "To units", "description": "The units to convert into. Separate units by a space for multiple outputs. In an output unit, use + for a multiplication space.", "type": "string", "example": "mi nmi", "suggested": true }, "4": { "label": "Precision or suffix", "description": "Significant digits after decimal dot or, if negative, exponent of ten.", "type": "number" }, "lk": { "label": "Link units", "description": "Indication of what units to apply wikilinks to. Use “on” for all, “in” for the input unit, “out” for the output units, or “off” for none of the units.", "default": "off", "type": "string", "example": "on" }, "abbr": { "label": "Abbreviation", "description": "Display for the units: “on” to display all units using their unit symbols, “off” to display all units in full words, “in” to display the unit symbol for the input unit, “out” to display the unit symbols for the output units, “unit” to display unit symbols for both input and output units when using scientific notation, “values” for no units at all (neither unit symbols nor full words of units).", "default": "out", "type": "string", "example": "on, unit, in, out, off", "suggested": true }, "sp": { "label": "Spelling", "description": "Spelling of units. Use “us” to display unit names using U.S. spelling.", "type": "string", "example": "us" }, "adj": { "label": "Adjective", "description": "Whether to use adjectival form. Use “on” for singular unit name appended by a hyphen, “mid” to put conversion at end, or “off” (default) for no adjectival form.", "type": "unbalanced-wikitext", "example": "on", "default": "off" }, "disp": { "label": "Conversion", "description": "Display conversion result: “or”: after ‘or’, “x”: with custom prefix and suffix, “b”: in parentheses, “table”/“tablecen”, “output only”: alone, “output number only”: alone and without unit, “unit”: not at all but input unit; if the value is a number it is used as precision.", "type": "string", "example": "b" }, "order": { "label": "Ordering", "description": "“flip” returns converted value first, input value second.", "type": "string", "example": "flip" }, "sigfig": { "label": "Significant figures", "description": "Indicates the number of significant figures to be used in rounding.", "type": "number" }, "round": { "label": "Rounding output", "description": "The type of rounding. “5” rounds the output number to nearest multiple of 5, “25” to nearest multiple of 25, “each” rounds each number in a range.", "type": "number" }, "comma": { "label": "Thousands separator", "description": "Sets or suppresses the use of thousands separators in the numbers. “off”: no separator; “gaps”: use space instead of comma as thousands separator; “5”: only add thousands separator when the integral part of the number uses 5 positions or more (10,000 or more; if using comma as thousands separator, 1234 would produce '1234', 12345 would produce '12,345').", "default": "on", "type": "string", "example": "off" }, "sortable": { "label": "Sort key", "description": "“on” generates a hidden sort key", "type": "string", "example": "on" }, "spell": { "label": "Spell numbers?", "description": "If used, spells input or input and output numbers in words, optionally capitalizing the first", "example": "'in', 'In', 'on', or 'On'", "type": "string" }, "sing": { "type": "string", "deprecated": "use adj=", "label": "Singular?", "description": "If 'yes', uses singular form of units (deprecated)", "example": "yes" }, "frac": { "label": "Fraction?", "description": "fraction as rounding unit", "type": "number" }, "$": { "label": "Currency symbol", "description": "sets currency symbol in both units", "example": "$=€ will show \" €10 per mile (€6.2/km)\"", "type": "string" }, "input": { "label": "WD property", "description": "Reads the property value of the item (article), then converts it", "example": " (P2046=area)", "type": "string" } }, "format": "inline" } </templatedata> See also Template:Temp Template:Temp Template:Temp to convert historical prices to their current equivalent. Template:Convert navs Template:Sandbox other at 2800 rpm	10.1:1
1962	2 × 4-Barrel Carbs	Template:Documentation subpage Template:Hatnote {{#ifeq:Engine|Template:Convert|Template:High-risk}} Template:Transwiki guide Template:Lua Template Template:Tl calculates from one measurement unit to another one, and then presents the results formatted. The complete list of unit symbols recognized by the template is at Module:Convert/documentation/conversion data. For example: {{convert|2|km|mi}} → (km entered, so converted into mile) {{convert|7|mi|km}} → (mi entered, so converted into km) Numbers can be rounded, units can be abbreviated into symbols: {{convert|2|km|mi|2|abbr=on}} → {{convert|7|mi|km|2|abbr=on}} → Value ranges can be entered using |to|... or |-|...: {{convert|2|to|5|km|mi}} → {{convert|2|-|5|km|mi}} → Combined effect example: {{convert|2|-|5|km|mi|2|abbr=on}} → {{convert|2|and|5|km|mi|sigfig=3|abbr=off}} → Units to convert Template:Hatnote Enter units to convert from into: {{convert|1|lb|kg}} → SI units generally accept prefixes, like "m" for milli (10−3), and "M" for mega (106) For "per" units, use "/" (slash): kg/ha For three-unit units, etc., see Template:Cl Unit name or symbol (abbreviation): 1 pound or 1 lb? By default, the first quantity shows the unit name, the second shows the symbol (or abbreviation): {{convert|1|lb|kg}} → Using Template:Para is the reverse behaviour to the default: {{convert|1|lb|kg|abbr=in}} → To abbreviate both or neither: {{convert|1|lb|kg|abbr=on}} → {{convert|1|lb|kg|abbr=off}} → Convenience: Template:Tlf has Template:Para by default Template Template:Tl is the same as Template:Tlf, except that it has Template:Para as the default behaviour. In Template:Tlf, all other options are available. So: {{cvt|1|lb|kg}} → Template:Cvt is equivalent to: {{convert|1|lb|kg|abbr=on}} → Template:Cvt Adjective: a 10-mile distance Use Template:Para to produce the adjectival (hyphenated) form: A {{convert|10|mi|km|adj=on}} distance → A distance. Default behaviour, for comparison: {{convert|10|mi|km}} to go → to go. Template:Para does not produce hyphens with unit symbols, as per Manual of Style: A {{convert|9|in|cm|adj=on|abbr=on}} nail → A nail. Template:AnchorRounding: 100 ft is 30 m or 30.5 m or 30.48 m? Template:Hatnote By definition, 100 ft equals . In practical use, it is common to round the calculated metric number. With that, there are several possibilities. Default rounding By Template:Tlf default, the conversion result will be rounded either to precision comparable to that of the input value (the number of digits after the decimal point—or the negative of the number of non-significant zeroes before the point—is increased by one if the conversion is a multiplication by a number between 0.02 and 0.2, remains the same if the factor is between 0.2 and 2, is decreased by 1 if it is between 2 and 20, and so on) or to two significant digits, whichever is more precise. An exception to this is rounding temperatures (see below). Examples of rounding Input Displays as Note {{convert|123|ft|m|-1}} {{convert|123|ft|m}} same output as with 0 (below) {{convert|123|ft|m|0}} {{convert|123|ft|m|1}} {{convert|123|ft|m|2}} The more-exact value is 37.4904 m or so, which gets converted to 37 m if this parameter is not specified at all. {{convert|500|ft|m|-1}} {{convert|500|ft|m}} same output as with −1 (above), because the conversion factor is between 0.2 and 2 (hence, it should produce same double-zero precision (−2) as in the input value), but the conversion must produce two significant digits at a minimum (hence, a higher single-zero precision (−1) is used) {{convert|500|ft|m|0}} {{convert|500|ft|m|1}} {{convert|500|ft|m|2}} exact value is 152.4 m {{convert|500|ft|cm|-3}} {{convert|500|ft|cm}} same output as with −3 (above), because the conversion factor is between 20 and 200 (hence, it should decrease input value's double-zero precision (−2) by 2), but the conversion must produce two significant digits at a minimum (hence, a higher triple-zero precision (−3) is used) {{convert|500|ft|cm|0}} Convert supports four types of rounding: Round to a given precision: use a precision number Specify the desired precision with the fourth unnamed parameter (or third unnamed parameter if the "convert to" parameter is omitted; or fifth unnamed parameter if a range is specified; or fourth unnamed parameter again if a range is specified and the "convert to" parameter is omitted; needs to be replaced with a "precision" named parameter). The conversion is rounded off to the nearest multiple of Template:Frac to the power of this number. For instance, if the result is 8621 and the round number is "-2", the result will be 8600. If the result is "234.0283043" and the round number is "0", the result will be 234. Round to a given number of significant figures: Template:Para To specify the output number to be with n significant figures use Template:Para: {{convert|1200|ft|m|sigfig=4}} → {{convert|1200|ft|m|sigfig=3}} → {{convert|1200|ft|m|sigfig=2}} → {{convert|1200|ft|m|sigfig=1}} → Default behaviour, for comparison: {{convert|1200|ft|m}} → Setting Template:Para to a value less than 1 is meaningless: {{convert|1200|ft|m|sigfig=0}} → Template:Nay Round to a multiple of 5: 15, 20, 25, ... Using Template:Para rounds the outcome to a multiple of 5. {{convert|10|m|ft}} → {{convert|10|m|ft|round=5}} → Similar: using Template:Para rounds the outcome to a multiple of 25. {{convert|10|m|ft}} → {{convert|10|m|ft|round=25}} → Default behaviour, for comparison: {{convert|10|m|ft|sigfig=4}} → In a range, one can round each value individually to the default. Use Template:Para: {{convert|10 x 200 x 3000|m|ft}} → {{convert|10 x 200 x 3000|m|ft|round=each}} → Round to a multiple of a given fraction: Template:Frac inch Specify the desired denominator using Template:Para. (Denominator is the below-the-slash number, for example the 3 in Template:Frac). {{convert|5.56|cm|in|frac=16}} → {{convert|8|cm|in|frac=4}} → The fraction is reduced when possible: {{convert|8|cm|in|frac=100}} → Default behaviour uses decimal notation: {{convert|5.56|cm|in}} → Template:AnchorRounding temperatures: °C, °F and K In temperatures, the conversion will be rounded either to the precision comparable to that of the input value or to that which would give three significant figures when expressed in kelvins, whichever is more precise. {{#invoke:DemoTemplate|convert|10,000|C|F K}} {{#invoke:DemoTemplate|convert|10,000.1|C|F K}} {{#invoke:DemoTemplate|convert|-272|C|F K}} {{#invoke:DemoTemplate|convert|-272|C}} {{#invoke:DemoTemplate|convert|100|C|F K}} {{#invoke:DemoTemplate|convert|0|C|F K}} The precision of the input number in example (1) is one digit, but the precision of its Kelvins expression is three, so the precision of the Fahrenheit conversion is made three (made 180...) . (1) and (2) seem to belie the fact that a , and make the 32 degrees difference shown in (1) begin to seem off somehow. Result (1) seems off until you set the significant figures yourself with Template:Para: {{#invoke:DemoTemplate|convert|10000|C|sigfig=5}} or you set the precision positionally, relative to the decimal point (zero being at the decimal point): {{#invoke:DemoTemplate|convert|10000|C|0}} The precision of the input number in example (2) is six, so the precision of the Fahrenheit output is, whereas before, Kelvins had determined it to be three. Examples (3) and (4) show how this can be hidden and generate questions, but it occurs there because the Kelvins conversion generated two fractional parts. (Before it was the input number that generated the fractional part.) In example (3) the three input digits converted into five significant output digits because of the two digits after the decimal point, generated by the Kelvins conversion. This happened again in (5), but in (6) decimal fractions were neither given as input nor induced by the Kelvins conversion. Rounding input There is limited support for rounding the displayed input number. The rounding takes place after conversion, so the output is based on the full-precision input. This is useful when the input is produced by Template:Tlc or otherwise available to a higher precision than is usefully displayed, and it's desirable to avoid double-rounding. To round the input to a specified number of digits after the decimal point, use one of the parameters: Template:Para Template:Para Template:Para Template:Para Note that there is no Template:ParaTemplate:Nay or similar for rounding above the decimal place. Neither is there support for significant figures, multiples of 5, or any other output-rounding feature. The default precision is computed based on the input, so an explicit output precision must usually be supplied: Template:Tlc → Template:Nay (precisions are mismatched) Template:Tlc → Template:Aye In this case, if the input were rounded before conversion, a different result would be obtained: Template:Tlc → Template:Nay (double rounding) Into multiple units: Separate the multiple output units by a space: {{convert|10|C|F K}} → {{convert|5|km|mi nmi}} → If the output unit names contain spaces, use + as the separator. See also: For multiple-unit options like 1 ft 5 in, see Template:Section link and Template:Section link. Ranges of values Template:For A range converts two values and separates them by your choice of words and punctuation. A range: 6 to 17 kg (13 to 37 lb) Range indicators are entered as the second parameter (between the values). Range separators can be: Template:Convert/doc/range separator list Multiple dimensions: Use by: {{convert|6|by|12|ft|m}} → Use ×, multiplication sign, or x, letter: {{convert|6|x|12|m|ft}} → In science, the formal way is to set |x| and Template:Para (keeping dimensions right, like in area = x km2): {{convert|6|x|12|m|ft|abbr=on}} → Lists of values: 20, 40, or 60 miles {{convert|20|,|40|, or|60|mi}} → About feet, inch in ranges and multiples While it is possible to enter feet, inch in a simple conversion, this is not possible for ranges: {{convert|1|ft|3|in|x|3|ft|5|in|mm}} → Template:Nay Default behaviour, for comparison: {{convert|1|ft|3|in|mm}} → However, converting metric units into feet and inches with Template:Para can produce the desired output: {{convert|380|x|1040|mm|ftin|order=flip}} → Words Spelling of unit name: international metre or US meter? Default spelling of units is in the en (generic) locale. To show en-US spelling, use Template:Para: {{convert|1|m|ft}} → —default {{convert|1|m|ft|sp=us}} → Spell out numbers: ten miles To write a number in words, use Template:Para: {{convert|10|mi|m|spell=in}} → To spell out both in and out values, use Template:Para: {{convert|10|mi|m|spell=on}} → To make first letter a capital, use Template:Para, Template:Para {{convert|10|mi|m|spell=In}} → {{convert|10|mi|m|spell=On}} → Remember that the spelling of the units (ft, m) is independently set by Template:Para. To the extreme: {{convert|10|mi|m|spell=on|abbr=off|sp=us}} → Inserted before units: 4 planted acres {{convert|4|acre||adj=pre|planted}} → disp=preunit is similar, but has no separator after the specified text, and can have different text for the output value: {{convert|4|acre||disp=preunit|planted }} → {{convert|4|acre||disp=preunit|planted |reforested-}} → After adjective unit: A corridor Note that two units (in this case, ft and m) are required. Use with just one unit will generate an error message. {{convert|10|ft|m|adj=mid|-long}} → Plurals: 1 inch, 2 inches The unit symbol is singular always. Depending on the preceding number only, a unit name can be shown plural. {{convert|1|metre}} → {{convert|2|metre}} → {{convert|2|metre|abbr=on}} → Exception Entering the unit spelled |foot| forces singular output "foot", whatever the number is. {{convert|100|foot|abbr=off}} → Fractions: one-eighth of an imperial pint The convert template also supports spelling out fractions. {{convert|3+1/2|oz|g|spell=in}} → Any additional words needed for the fraction can also be added at the end of the template. {{convert|1/8|imppt|ml|spell=in|adj=pre|of an}} → Wrapping and line breaking See Template:Section link Spelling out "thousands", "millions", etc. Most unit codes accept a prefix of e3 (thousand) or e6 (million) or e9 (billion). {{convert|100|e6mi|e6km}} → {{convert|120|e6acre}} → {{convert|120|e6acre|e3km2}} → To display both input and output in scientific notation, use Template:Para {{convert|100|e6mi|e6km|abbr=on}} → To spell out "thousands", "millions", etc., Template:Para abbreviates the unit; Template:Para displays both full unit names. {{convert|100|e6mi|e6km|abbr=unit}} → {{convert|100|e6mi|e6km|abbr=off}} → Numbers Using an SI prefix: gigametre (Gm), or micrometre (μm) Template:Sidebar metric prefixes (small) Units can have an SI prefix like G before the unit: Gm, and giga before the name: gigametre. These are plain multiplication factors. To illustrate, these are trivial calculations (from metre to metre), showing the multiplication factor: The prefix can be added before the SI unit (here: unit m for metre): {{convert|12|Gm|mi|abbr=on}} → Mm: km: mm: μm: um: (letter "u" can be used for "μ" here) The prefix can be used in the output unit: {{convert|12000|mi|Mm|abbr=on}} → {{convert|12|in|μm|abbr=on}} → As an exception, the non-SI unit "inch" can have the "μ" prefix too: {{convert|12|μm|μin|abbr=on}} → Engineering notation: 7 × 106 m In the unit: e6m Engineering notation can be entered as a "prefix" to the unit: {{convert|70|e6m}} → The same is possible for the output unit: {{convert|23,000,000|ft|e6m}} → Any standard unit (not a combination, multiple, or built-in unit) can have such a prefix: e3 (thousand), e6 (million), e9 (billion), e12 (trillion), e15 (quadrillion). Scientific notation: 1.23 × 10−14 In scientific notation, a number is written like Template:Rnd. The plain number has exactly one digit before the decimal point. With Template:Tlf, the input can be in e-notation such as 12.3e4. This value is displayed as a power of ten, and the output is displayed in scientific notation, except that an output value satisfying 0.01 <= v < 1000 is shown as a normal number. In addition, if the output value is 1000 and sigfig=4 is used, the value is displayed as a normal number. {{convert|12.3e-15|atm|atm|abbr=on}} → {{convert|0.00000005|atm|atm|abbr=on}} → Input with fractions: The number to convert can be written in fractions. Both / (keyboard slash) and ⁄ (fraction slash) are accepted: {{convert|1/2|in|mm|1}} → {{convert|1⁄2|in|mm|1}} → With positive mixed numbers (a positive integer and a fraction), use a + sign {{convert|2+1⁄2|in|mm|1}} → With negative mixed numbers, use a hyphen - and repeat it: {{convert|-2-1⁄2|in|mm|1}} → Note that the following cases are not interpreted as mixed numbers: {{convert|2-1⁄2|in|mm|1}} → . This is interpreted as a range from 2 inches to 1⁄2 inch. {{convert|-2+1⁄2|in|mm|1}} → Template:Nay This is neither a mixed number nor a range, and mathematical expressions requiring calculations are not allowed here. Horizontal fraction bar: Template:Sfrac inch Using a double slash (//) provides a horizontal fraction bar for the original (input) unit: {{convert|1//2|in|mm|1}} → {{convert|6+3//8|in|mm|1}} → Using a negative value for Template:Para provides a horizontal fraction bar for the converted (output) unit: {{convert|12.7|mm|frac=-2}} → {{convert|161.9|mm|frac=-8}} → Thousands separator: 1,000 mi or 1000 mi In input, a comma for thousands separator is accepted but not required; a gap (space) is not accepted. In output, by default, the thousand separator is the comma: {{convert|1234567|m|ft}} → {{convert|1,234,567|m|ft}} → Set Template:Para to remove the separator from the output: {{convert|1234567|m|ft|comma=off}} → Use Template:Para to use digit grouping by gap (thin space) as a thousands separator: {{convert|1234567|m|ft|comma=gaps}} → Default behaviour, for comparison: {{convert|1234567|m|ft}} → Setting Template:Para will only add the separator when the number of digits is 5 or more: {{convert|1234|m|ft|comma=5}} → {{convert|1234567|m|ft|comma=5}} → Default behaviour, for comparison: {{convert|1234|m|ft}} → Output manipulation Brackets and separators: 10 m [33 ft] Punctuation that distinguishes the two measurements is set by Template:Para. Options are: b (the default), sqbr, comma, or, br, x|…: {{convert|10|m|ft|disp=sqbr}} → {{convert|10|m|ft|disp=comma}} → {{convert|10|m|ft|disp=or}} → Default behaviour, for comparison: {{convert|10|m|ft}} → Setting Template:Para will force a new line (<br/>) {{convert|10|m|ft|disp=br}} → Also Template:Para will force a new line, and keep the brackets (useful in tables): {{convert|10|m|ft|disp=br()}} → Setting Template:Para allows any text as separator: {{convert|10|m|ft|disp=x|_MyText_}} → (To display spaces, use &nbsp;) Flipping (reordering) the two measurements: Setting Template:Para will flip (swap) the two measurements: {{convert|1|mi|m|order=flip}} → Default behaviour, for comparison: {{convert|1|mi|m}} → When converting to multiple units, the effect is: {{convert|10|km|mi nmi|order=flip}} → {{convert|10|km|nmi mi|order=flip}} → Fixed ordering of output units: Setting Template:Para shows the output-units as ordered; the input unit is skipped: {{convert|100|C|F C K|abbr=on|order=out}} → {{convert|200|PS|kW hp|0|abbr=on|order=out}} → See also: § Displaying parts of the output. Displaying parts of the result: It is possible to display only parts of the conversion result: Convert Output Returns {{convert|2|cuyd|m3}} Regular output (for comparison) {{convert|2|cuyd|m3|abbr=values}} Input and output numbers {{convert|2|cuyd|m3|disp=unit}} Input unit {{convert|2|cuyd|m3|disp=unit|adj=on}} Input unit, adjective (hyphenated) {{convert|2|cuyd|cuyd|disp=out}} Input (workaround. Template:Nowrap) {{convert|2|cuyd|m3|abbr=~}} Input: both name and symbol {{convert|2|cuyd|m3|disp=unit2}} Output unit (symbol) {{convert|2|cuyd|m3|disp=unit2|abbr=off}} Output unit (name) {{convert|2|cuyd|m3|disp=number}} Output value {{convert|2|cuyd|m3|disp=out}} Output value and unit name {{convert|2|cuyd|m3|disp=out|abbr=off}} Output value and unit symbol Display both input name and symbol: 2 kilopascals [kPa] Setting Template:Para returns both name and symbol of the first (input) unit: {{convert|2|kPa|psi|abbr=~}} → A {{convert|2|kPa|psi|abbr=~|adj=on}} pressure → Template:Nowrap Table options For the wikitable structure, there are three options: add a line-break, split the result over columns and make the table sortable. Enforced line break Template:Para adds a line-break and omits brackets. Template:Para adds a line-break and does add brackets to the converted value. This may be useful in tables: Template:Para Template:Para Table columns Using {convert} in a table cell, with Template:Para splits the result over two (or more) columns. By default units are not included in the table, however, they can be added using the Template:Para parameter. Multiple-unit outputs, like ftin, always output their units to the table. {{convert|10|m|ft|disp=table}} → Template:Para does the same, and also centers the text: {{convert|20|m|ft|disp=tablecen}} → The units are added as a column header:   kilograms pounds stone and pounds Template:Para Template:Para and Template:Para Template:Para and Template:Para Template:Para Template:Para (default) Sorting Use Template:Para to include a hidden numerical sortkey in the output, suitable for use in a table with sortable columns. Technically, this places a hidden string before the actual displayed values: {{convert|10|m|ft|sortable=on}} Template:Nowrap showing: . Use both Template:Para and Template:Para together to produce table columns (pipe symbols) for each value in sortable columns: m ft A B C D The generated sortkey is calculated in a consistent way based on both the value and its unit as passed to the convert template. In most cases convert uses the passed value converted to SI base units. It is therefore not necessarily the displayed value or other alternate units and is calculated regardless of output format options. Using different units or different order of units in individual rows should therefore not lead to incorrect sorting, although variations in rounding can give surprising results, since an unrounded number is used for the sortkey. Units The conversion factors and physical constants are sourced here. All units Template:Anchor'per' units: kg/hl, miles per gallon When using a slash (/), a unit like kg/hl is recognized as kilograms per hectolitre and will be converted with other mass/volume units. {{convert|1000|kg/hl}} → Population density (inhabitants per square mile) can be converted using {{convert|10|PD/sqmi|PD/km2}} → Vehicular fuel efficiency, commonly expressed in miles per gallon or litres per 100 km can also be converted {{convert|26|mpgUS|l/100km mpgimp}} → Template:AnchorUnits of difference: Expressing a change or difference in temperature We have already discussed standard temperature conversions (°C, °F, K), as shown in these two examples: {{#invoke:DemoTemplate|convert|10|C}} (standard temperature conversion) {{#invoke:DemoTemplate|convert|10–15|C}} (standard temperature range conversion) When expressing a temperature change (e.g., "The temperature increased by 10 °C"), or when comparing temperatures (e.g., "10 to 15 °C warmer"), we cannot use the standard temperature units (Template:Para, Template:Para and Template:Para), which refer to points on the respective scale. Instead, we must use one of the following "units of difference": Template:Para, Template:Para and Template:Para. Compare the following two examples with the two above: {{#invoke:DemoTemplate|convert|10|C-change}} increase in temperature {{#invoke:DemoTemplate|convert|10–15|C-change}} warmer than normal To produce multiple units in the output: {{#invoke:DemoTemplate|convert|10|C-change|F-change K-change}} difference Multiple units: 1 ft 5 in In input Base document Template:Slink lists options for multiple unit input (like ft,in). It can catch predefined sets only (units that can be subdivided; e.g., yd into ft): {{convert|1|yd|2|ft|3|in}} → {{convert|2|ft|3|in|cm}} → {{convert|1|lb|5|oz|g}} → In output Available multiple-unit output options predefined, like ftin and ydftin. The full list is at Template:Slink. {{convert|2|m|ftin}} → {{convert|2|m|ft in}} → , using a space, returns the decimal point Default behaviour, for comparison: {{convert|2|m}} → See also: Template:Tl a length used to measure horses Template:Tl a weight in ton, cwt, qr and lb Currency per unit: $/mi → $/km Using currency symbols in a $ per unit value, you can convert the per-unit: {{convert|10|$/mi|$/km}} → {{convert|1500|$/ozt|$/g}} → You can set the currency in both values using Template:Para: {{convert|10|$/mi|$/km|$=€}} → It is not possible to convert the currency. So, this result (mixed currencies) is not possible: Template:!mxt Template:Nay Using convert inside templates For usage in template code, like infoboxes, Template:Tlf has these options: Pre-formatting fraction input Module:Convert/helper can read regular input and pre-format it into Template:Tlf-accepted input. Your template can accept Template:Para and use {{#invoke:Convert/helper|number|16 7/8}} → {{#invoke:Convert/helper|number|16 7/8}} Using a Wikidata property Adding the Wikidata property code, like code Template:Para, to your template code automatically returns the Wikidata property for that article, and convert it. Both number and unit are read. Note: to return that property value for an other article, use Template:Para. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) {{convert|input=P2073|qid=Q1056131|ftin|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on|disp=out}} → For example see template:Infobox Telescope. Sometimes a property may have more than one value against it in Wikidata. You can use the Template:Para parameter to specify which of the values you want to use. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) Template:Wikidata entity link: {{convert|input=P2386|qual=Q613628|ft|abbr=on}} → Template:Wikidata entity link: {{convert|input=P2386|qual=Q1395645|ft|abbr=on}} → Parameter list Deprecated options TemplateData <templatedata> { "description": "Converts measurements to other units.", "params": { "1": { "label": "Value", "description": "The value to convert.", "type": "number", "required": true }, "2": { "label": "From unit", "description": "The unit for the provided value.", "type": "string", "example": "km", "required": true }, "3": { "label": "To units", "description": "The units to convert into. Separate units by a space for multiple outputs. In an output unit, use + for a multiplication space.", "type": "string", "example": "mi nmi", "suggested": true }, "4": { "label": "Precision or suffix", "description": "Significant digits after decimal dot or, if negative, exponent of ten.", "type": "number" }, "lk": { "label": "Link units", "description": "Indication of what units to apply wikilinks to. Use “on” for all, “in” for the input unit, “out” for the output units, or “off” for none of the units.", "default": "off", "type": "string", "example": "on" }, "abbr": { "label": "Abbreviation", "description": "Display for the units: “on” to display all units using their unit symbols, “off” to display all units in full words, “in” to display the unit symbol for the input unit, “out” to display the unit symbols for the output units, “unit” to display unit symbols for both input and output units when using scientific notation, “values” for no units at all (neither unit symbols nor full words of units).", "default": "out", "type": "string", "example": "on, unit, in, out, off", "suggested": true }, "sp": { "label": "Spelling", "description": "Spelling of units. Use “us” to display unit names using U.S. spelling.", "type": "string", "example": "us" }, "adj": { "label": "Adjective", "description": "Whether to use adjectival form. Use “on” for singular unit name appended by a hyphen, “mid” to put conversion at end, or “off” (default) for no adjectival form.", "type": "unbalanced-wikitext", "example": "on", "default": "off" }, "disp": { "label": "Conversion", "description": "Display conversion result: “or”: after ‘or’, “x”: with custom prefix and suffix, “b”: in parentheses, “table”/“tablecen”, “output only”: alone, “output number only”: alone and without unit, “unit”: not at all but input unit; if the value is a number it is used as precision.", "type": "string", "example": "b" }, "order": { "label": "Ordering", "description": "“flip” returns converted value first, input value second.", "type": "string", "example": "flip" }, "sigfig": { "label": "Significant figures", "description": "Indicates the number of significant figures to be used in rounding.", "type": "number" }, "round": { "label": "Rounding output", "description": "The type of rounding. “5” rounds the output number to nearest multiple of 5, “25” to nearest multiple of 25, “each” rounds each number in a range.", "type": "number" }, "comma": { "label": "Thousands separator", "description": "Sets or suppresses the use of thousands separators in the numbers. “off”: no separator; “gaps”: use space instead of comma as thousands separator; “5”: only add thousands separator when the integral part of the number uses 5 positions or more (10,000 or more; if using comma as thousands separator, 1234 would produce '1234', 12345 would produce '12,345').", "default": "on", "type": "string", "example": "off" }, "sortable": { "label": "Sort key", "description": "“on” generates a hidden sort key", "type": "string", "example": "on" }, "spell": { "label": "Spell numbers?", "description": "If used, spells input or input and output numbers in words, optionally capitalizing the first", "example": "'in', 'In', 'on', or 'On'", "type": "string" }, "sing": { "type": "string", "deprecated": "use adj=", "label": "Singular?", "description": "If 'yes', uses singular form of units (deprecated)", "example": "yes" }, "frac": { "label": "Fraction?", "description": "fraction as rounding unit", "type": "number" }, "$": { "label": "Currency symbol", "description": "sets currency symbol in both units", "example": "$=€ will show \" €10 per mile (€6.2/km)\"", "type": "string" }, "input": { "label": "WD property", "description": "Reads the property value of the item (article), then converts it", "example": " (P2046=area)", "type": "string" } }, "format": "inline" } </templatedata> See also Template:Temp Template:Temp Template:Temp to convert historical prices to their current equivalent. Template:Convert navs Template:Sandbox other at 5000 rpm	Template:Documentation subpage Template:Hatnote {{#ifeq:Engine|Template:Convert|Template:High-risk}} Template:Transwiki guide Template:Lua Template Template:Tl calculates from one measurement unit to another one, and then presents the results formatted. The complete list of unit symbols recognized by the template is at Module:Convert/documentation/conversion data. For example: {{convert|2|km|mi}} → (km entered, so converted into mile) {{convert|7|mi|km}} → (mi entered, so converted into km) Numbers can be rounded, units can be abbreviated into symbols: {{convert|2|km|mi|2|abbr=on}} → {{convert|7|mi|km|2|abbr=on}} → Value ranges can be entered using |to|... or |-|...: {{convert|2|to|5|km|mi}} → {{convert|2|-|5|km|mi}} → Combined effect example: {{convert|2|-|5|km|mi|2|abbr=on}} → {{convert|2|and|5|km|mi|sigfig=3|abbr=off}} → Units to convert Template:Hatnote Enter units to convert from into: {{convert|1|lb|kg}} → SI units generally accept prefixes, like "m" for milli (10−3), and "M" for mega (106) For "per" units, use "/" (slash): kg/ha For three-unit units, etc., see Template:Cl Unit name or symbol (abbreviation): 1 pound or 1 lb? By default, the first quantity shows the unit name, the second shows the symbol (or abbreviation): {{convert|1|lb|kg}} → Using Template:Para is the reverse behaviour to the default: {{convert|1|lb|kg|abbr=in}} → To abbreviate both or neither: {{convert|1|lb|kg|abbr=on}} → {{convert|1|lb|kg|abbr=off}} → Convenience: Template:Tlf has Template:Para by default Template Template:Tl is the same as Template:Tlf, except that it has Template:Para as the default behaviour. In Template:Tlf, all other options are available. So: {{cvt|1|lb|kg}} → Template:Cvt is equivalent to: {{convert|1|lb|kg|abbr=on}} → Template:Cvt Adjective: a 10-mile distance Use Template:Para to produce the adjectival (hyphenated) form: A {{convert|10|mi|km|adj=on}} distance → A distance. Default behaviour, for comparison: {{convert|10|mi|km}} to go → to go. Template:Para does not produce hyphens with unit symbols, as per Manual of Style: A {{convert|9|in|cm|adj=on|abbr=on}} nail → A nail. Template:AnchorRounding: 100 ft is 30 m or 30.5 m or 30.48 m? Template:Hatnote By definition, 100 ft equals . In practical use, it is common to round the calculated metric number. With that, there are several possibilities. Default rounding By Template:Tlf default, the conversion result will be rounded either to precision comparable to that of the input value (the number of digits after the decimal point—or the negative of the number of non-significant zeroes before the point—is increased by one if the conversion is a multiplication by a number between 0.02 and 0.2, remains the same if the factor is between 0.2 and 2, is decreased by 1 if it is between 2 and 20, and so on) or to two significant digits, whichever is more precise. An exception to this is rounding temperatures (see below). Examples of rounding Input Displays as Note {{convert|123|ft|m|-1}} {{convert|123|ft|m}} same output as with 0 (below) {{convert|123|ft|m|0}} {{convert|123|ft|m|1}} {{convert|123|ft|m|2}} The more-exact value is 37.4904 m or so, which gets converted to 37 m if this parameter is not specified at all. {{convert|500|ft|m|-1}} {{convert|500|ft|m}} same output as with −1 (above), because the conversion factor is between 0.2 and 2 (hence, it should produce same double-zero precision (−2) as in the input value), but the conversion must produce two significant digits at a minimum (hence, a higher single-zero precision (−1) is used) {{convert|500|ft|m|0}} {{convert|500|ft|m|1}} {{convert|500|ft|m|2}} exact value is 152.4 m {{convert|500|ft|cm|-3}} {{convert|500|ft|cm}} same output as with −3 (above), because the conversion factor is between 20 and 200 (hence, it should decrease input value's double-zero precision (−2) by 2), but the conversion must produce two significant digits at a minimum (hence, a higher triple-zero precision (−3) is used) {{convert|500|ft|cm|0}} Convert supports four types of rounding: Round to a given precision: use a precision number Specify the desired precision with the fourth unnamed parameter (or third unnamed parameter if the "convert to" parameter is omitted; or fifth unnamed parameter if a range is specified; or fourth unnamed parameter again if a range is specified and the "convert to" parameter is omitted; needs to be replaced with a "precision" named parameter). The conversion is rounded off to the nearest multiple of Template:Frac to the power of this number. For instance, if the result is 8621 and the round number is "-2", the result will be 8600. If the result is "234.0283043" and the round number is "0", the result will be 234. Round to a given number of significant figures: Template:Para To specify the output number to be with n significant figures use Template:Para: {{convert|1200|ft|m|sigfig=4}} → {{convert|1200|ft|m|sigfig=3}} → {{convert|1200|ft|m|sigfig=2}} → {{convert|1200|ft|m|sigfig=1}} → Default behaviour, for comparison: {{convert|1200|ft|m}} → Setting Template:Para to a value less than 1 is meaningless: {{convert|1200|ft|m|sigfig=0}} → Template:Nay Round to a multiple of 5: 15, 20, 25, ... Using Template:Para rounds the outcome to a multiple of 5. {{convert|10|m|ft}} → {{convert|10|m|ft|round=5}} → Similar: using Template:Para rounds the outcome to a multiple of 25. {{convert|10|m|ft}} → {{convert|10|m|ft|round=25}} → Default behaviour, for comparison: {{convert|10|m|ft|sigfig=4}} → In a range, one can round each value individually to the default. Use Template:Para: {{convert|10 x 200 x 3000|m|ft}} → {{convert|10 x 200 x 3000|m|ft|round=each}} → Round to a multiple of a given fraction: Template:Frac inch Specify the desired denominator using Template:Para. (Denominator is the below-the-slash number, for example the 3 in Template:Frac). {{convert|5.56|cm|in|frac=16}} → {{convert|8|cm|in|frac=4}} → The fraction is reduced when possible: {{convert|8|cm|in|frac=100}} → Default behaviour uses decimal notation: {{convert|5.56|cm|in}} → Template:AnchorRounding temperatures: °C, °F and K In temperatures, the conversion will be rounded either to the precision comparable to that of the input value or to that which would give three significant figures when expressed in kelvins, whichever is more precise. {{#invoke:DemoTemplate|convert|10,000|C|F K}} {{#invoke:DemoTemplate|convert|10,000.1|C|F K}} {{#invoke:DemoTemplate|convert|-272|C|F K}} {{#invoke:DemoTemplate|convert|-272|C}} {{#invoke:DemoTemplate|convert|100|C|F K}} {{#invoke:DemoTemplate|convert|0|C|F K}} The precision of the input number in example (1) is one digit, but the precision of its Kelvins expression is three, so the precision of the Fahrenheit conversion is made three (made 180...) . (1) and (2) seem to belie the fact that a , and make the 32 degrees difference shown in (1) begin to seem off somehow. Result (1) seems off until you set the significant figures yourself with Template:Para: {{#invoke:DemoTemplate|convert|10000|C|sigfig=5}} or you set the precision positionally, relative to the decimal point (zero being at the decimal point): {{#invoke:DemoTemplate|convert|10000|C|0}} The precision of the input number in example (2) is six, so the precision of the Fahrenheit output is, whereas before, Kelvins had determined it to be three. Examples (3) and (4) show how this can be hidden and generate questions, but it occurs there because the Kelvins conversion generated two fractional parts. (Before it was the input number that generated the fractional part.) In example (3) the three input digits converted into five significant output digits because of the two digits after the decimal point, generated by the Kelvins conversion. This happened again in (5), but in (6) decimal fractions were neither given as input nor induced by the Kelvins conversion. Rounding input There is limited support for rounding the displayed input number. The rounding takes place after conversion, so the output is based on the full-precision input. This is useful when the input is produced by Template:Tlc or otherwise available to a higher precision than is usefully displayed, and it's desirable to avoid double-rounding. To round the input to a specified number of digits after the decimal point, use one of the parameters: Template:Para Template:Para Template:Para Template:Para Note that there is no Template:ParaTemplate:Nay or similar for rounding above the decimal place. Neither is there support for significant figures, multiples of 5, or any other output-rounding feature. The default precision is computed based on the input, so an explicit output precision must usually be supplied: Template:Tlc → Template:Nay (precisions are mismatched) Template:Tlc → Template:Aye In this case, if the input were rounded before conversion, a different result would be obtained: Template:Tlc → Template:Nay (double rounding) Into multiple units: Separate the multiple output units by a space: {{convert|10|C|F K}} → {{convert|5|km|mi nmi}} → If the output unit names contain spaces, use + as the separator. See also: For multiple-unit options like 1 ft 5 in, see Template:Section link and Template:Section link. Ranges of values Template:For A range converts two values and separates them by your choice of words and punctuation. A range: 6 to 17 kg (13 to 37 lb) Range indicators are entered as the second parameter (between the values). Range separators can be: Template:Convert/doc/range separator list Multiple dimensions: Use by: {{convert|6|by|12|ft|m}} → Use ×, multiplication sign, or x, letter: {{convert|6|x|12|m|ft}} → In science, the formal way is to set |x| and Template:Para (keeping dimensions right, like in area = x km2): {{convert|6|x|12|m|ft|abbr=on}} → Lists of values: 20, 40, or 60 miles {{convert|20|,|40|, or|60|mi}} → About feet, inch in ranges and multiples While it is possible to enter feet, inch in a simple conversion, this is not possible for ranges: {{convert|1|ft|3|in|x|3|ft|5|in|mm}} → Template:Nay Default behaviour, for comparison: {{convert|1|ft|3|in|mm}} → However, converting metric units into feet and inches with Template:Para can produce the desired output: {{convert|380|x|1040|mm|ftin|order=flip}} → Words Spelling of unit name: international metre or US meter? Default spelling of units is in the en (generic) locale. To show en-US spelling, use Template:Para: {{convert|1|m|ft}} → —default {{convert|1|m|ft|sp=us}} → Spell out numbers: ten miles To write a number in words, use Template:Para: {{convert|10|mi|m|spell=in}} → To spell out both in and out values, use Template:Para: {{convert|10|mi|m|spell=on}} → To make first letter a capital, use Template:Para, Template:Para {{convert|10|mi|m|spell=In}} → {{convert|10|mi|m|spell=On}} → Remember that the spelling of the units (ft, m) is independently set by Template:Para. To the extreme: {{convert|10|mi|m|spell=on|abbr=off|sp=us}} → Inserted before units: 4 planted acres {{convert|4|acre||adj=pre|planted}} → disp=preunit is similar, but has no separator after the specified text, and can have different text for the output value: {{convert|4|acre||disp=preunit|planted }} → {{convert|4|acre||disp=preunit|planted |reforested-}} → After adjective unit: A corridor Note that two units (in this case, ft and m) are required. Use with just one unit will generate an error message. {{convert|10|ft|m|adj=mid|-long}} → Plurals: 1 inch, 2 inches The unit symbol is singular always. Depending on the preceding number only, a unit name can be shown plural. {{convert|1|metre}} → {{convert|2|metre}} → {{convert|2|metre|abbr=on}} → Exception Entering the unit spelled |foot| forces singular output "foot", whatever the number is. {{convert|100|foot|abbr=off}} → Fractions: one-eighth of an imperial pint The convert template also supports spelling out fractions. {{convert|3+1/2|oz|g|spell=in}} → Any additional words needed for the fraction can also be added at the end of the template. {{convert|1/8|imppt|ml|spell=in|adj=pre|of an}} → Wrapping and line breaking See Template:Section link Spelling out "thousands", "millions", etc. Most unit codes accept a prefix of e3 (thousand) or e6 (million) or e9 (billion). {{convert|100|e6mi|e6km}} → {{convert|120|e6acre}} → {{convert|120|e6acre|e3km2}} → To display both input and output in scientific notation, use Template:Para {{convert|100|e6mi|e6km|abbr=on}} → To spell out "thousands", "millions", etc., Template:Para abbreviates the unit; Template:Para displays both full unit names. {{convert|100|e6mi|e6km|abbr=unit}} → {{convert|100|e6mi|e6km|abbr=off}} → Numbers Using an SI prefix: gigametre (Gm), or micrometre (μm) Template:Sidebar metric prefixes (small) Units can have an SI prefix like G before the unit: Gm, and giga before the name: gigametre. These are plain multiplication factors. To illustrate, these are trivial calculations (from metre to metre), showing the multiplication factor: The prefix can be added before the SI unit (here: unit m for metre): {{convert|12|Gm|mi|abbr=on}} → Mm: km: mm: μm: um: (letter "u" can be used for "μ" here) The prefix can be used in the output unit: {{convert|12000|mi|Mm|abbr=on}} → {{convert|12|in|μm|abbr=on}} → As an exception, the non-SI unit "inch" can have the "μ" prefix too: {{convert|12|μm|μin|abbr=on}} → Engineering notation: 7 × 106 m In the unit: e6m Engineering notation can be entered as a "prefix" to the unit: {{convert|70|e6m}} → The same is possible for the output unit: {{convert|23,000,000|ft|e6m}} → Any standard unit (not a combination, multiple, or built-in unit) can have such a prefix: e3 (thousand), e6 (million), e9 (billion), e12 (trillion), e15 (quadrillion). Scientific notation: 1.23 × 10−14 In scientific notation, a number is written like Template:Rnd. The plain number has exactly one digit before the decimal point. With Template:Tlf, the input can be in e-notation such as 12.3e4. This value is displayed as a power of ten, and the output is displayed in scientific notation, except that an output value satisfying 0.01 <= v < 1000 is shown as a normal number. In addition, if the output value is 1000 and sigfig=4 is used, the value is displayed as a normal number. {{convert|12.3e-15|atm|atm|abbr=on}} → {{convert|0.00000005|atm|atm|abbr=on}} → Input with fractions: The number to convert can be written in fractions. Both / (keyboard slash) and ⁄ (fraction slash) are accepted: {{convert|1/2|in|mm|1}} → {{convert|1⁄2|in|mm|1}} → With positive mixed numbers (a positive integer and a fraction), use a + sign {{convert|2+1⁄2|in|mm|1}} → With negative mixed numbers, use a hyphen - and repeat it: {{convert|-2-1⁄2|in|mm|1}} → Note that the following cases are not interpreted as mixed numbers: {{convert|2-1⁄2|in|mm|1}} → . This is interpreted as a range from 2 inches to 1⁄2 inch. {{convert|-2+1⁄2|in|mm|1}} → Template:Nay This is neither a mixed number nor a range, and mathematical expressions requiring calculations are not allowed here. Horizontal fraction bar: Template:Sfrac inch Using a double slash (//) provides a horizontal fraction bar for the original (input) unit: {{convert|1//2|in|mm|1}} → {{convert|6+3//8|in|mm|1}} → Using a negative value for Template:Para provides a horizontal fraction bar for the converted (output) unit: {{convert|12.7|mm|frac=-2}} → {{convert|161.9|mm|frac=-8}} → Thousands separator: 1,000 mi or 1000 mi In input, a comma for thousands separator is accepted but not required; a gap (space) is not accepted. In output, by default, the thousand separator is the comma: {{convert|1234567|m|ft}} → {{convert|1,234,567|m|ft}} → Set Template:Para to remove the separator from the output: {{convert|1234567|m|ft|comma=off}} → Use Template:Para to use digit grouping by gap (thin space) as a thousands separator: {{convert|1234567|m|ft|comma=gaps}} → Default behaviour, for comparison: {{convert|1234567|m|ft}} → Setting Template:Para will only add the separator when the number of digits is 5 or more: {{convert|1234|m|ft|comma=5}} → {{convert|1234567|m|ft|comma=5}} → Default behaviour, for comparison: {{convert|1234|m|ft}} → Output manipulation Brackets and separators: 10 m [33 ft] Punctuation that distinguishes the two measurements is set by Template:Para. Options are: b (the default), sqbr, comma, or, br, x|…: {{convert|10|m|ft|disp=sqbr}} → {{convert|10|m|ft|disp=comma}} → {{convert|10|m|ft|disp=or}} → Default behaviour, for comparison: {{convert|10|m|ft}} → Setting Template:Para will force a new line (<br/>) {{convert|10|m|ft|disp=br}} → Also Template:Para will force a new line, and keep the brackets (useful in tables): {{convert|10|m|ft|disp=br()}} → Setting Template:Para allows any text as separator: {{convert|10|m|ft|disp=x|_MyText_}} → (To display spaces, use &nbsp;) Flipping (reordering) the two measurements: Setting Template:Para will flip (swap) the two measurements: {{convert|1|mi|m|order=flip}} → Default behaviour, for comparison: {{convert|1|mi|m}} → When converting to multiple units, the effect is: {{convert|10|km|mi nmi|order=flip}} → {{convert|10|km|nmi mi|order=flip}} → Fixed ordering of output units: Setting Template:Para shows the output-units as ordered; the input unit is skipped: {{convert|100|C|F C K|abbr=on|order=out}} → {{convert|200|PS|kW hp|0|abbr=on|order=out}} → See also: § Displaying parts of the output. Displaying parts of the result: It is possible to display only parts of the conversion result: Convert Output Returns {{convert|2|cuyd|m3}} Regular output (for comparison) {{convert|2|cuyd|m3|abbr=values}} Input and output numbers {{convert|2|cuyd|m3|disp=unit}} Input unit {{convert|2|cuyd|m3|disp=unit|adj=on}} Input unit, adjective (hyphenated) {{convert|2|cuyd|cuyd|disp=out}} Input (workaround. Template:Nowrap) {{convert|2|cuyd|m3|abbr=~}} Input: both name and symbol {{convert|2|cuyd|m3|disp=unit2}} Output unit (symbol) {{convert|2|cuyd|m3|disp=unit2|abbr=off}} Output unit (name) {{convert|2|cuyd|m3|disp=number}} Output value {{convert|2|cuyd|m3|disp=out}} Output value and unit name {{convert|2|cuyd|m3|disp=out|abbr=off}} Output value and unit symbol Display both input name and symbol: 2 kilopascals [kPa] Setting Template:Para returns both name and symbol of the first (input) unit: {{convert|2|kPa|psi|abbr=~}} → A {{convert|2|kPa|psi|abbr=~|adj=on}} pressure → Template:Nowrap Table options For the wikitable structure, there are three options: add a line-break, split the result over columns and make the table sortable. Enforced line break Template:Para adds a line-break and omits brackets. Template:Para adds a line-break and does add brackets to the converted value. This may be useful in tables: Template:Para Template:Para Table columns Using {convert} in a table cell, with Template:Para splits the result over two (or more) columns. By default units are not included in the table, however, they can be added using the Template:Para parameter. Multiple-unit outputs, like ftin, always output their units to the table. {{convert|10|m|ft|disp=table}} → Template:Para does the same, and also centers the text: {{convert|20|m|ft|disp=tablecen}} → The units are added as a column header:   kilograms pounds stone and pounds Template:Para Template:Para and Template:Para Template:Para and Template:Para Template:Para Template:Para (default) Sorting Use Template:Para to include a hidden numerical sortkey in the output, suitable for use in a table with sortable columns. Technically, this places a hidden string before the actual displayed values: {{convert|10|m|ft|sortable=on}} Template:Nowrap showing: . Use both Template:Para and Template:Para together to produce table columns (pipe symbols) for each value in sortable columns: m ft A B C D The generated sortkey is calculated in a consistent way based on both the value and its unit as passed to the convert template. In most cases convert uses the passed value converted to SI base units. It is therefore not necessarily the displayed value or other alternate units and is calculated regardless of output format options. Using different units or different order of units in individual rows should therefore not lead to incorrect sorting, although variations in rounding can give surprising results, since an unrounded number is used for the sortkey. Units The conversion factors and physical constants are sourced here. All units Template:Anchor'per' units: kg/hl, miles per gallon When using a slash (/), a unit like kg/hl is recognized as kilograms per hectolitre and will be converted with other mass/volume units. {{convert|1000|kg/hl}} → Population density (inhabitants per square mile) can be converted using {{convert|10|PD/sqmi|PD/km2}} → Vehicular fuel efficiency, commonly expressed in miles per gallon or litres per 100 km can also be converted {{convert|26|mpgUS|l/100km mpgimp}} → Template:AnchorUnits of difference: Expressing a change or difference in temperature We have already discussed standard temperature conversions (°C, °F, K), as shown in these two examples: {{#invoke:DemoTemplate|convert|10|C}} (standard temperature conversion) {{#invoke:DemoTemplate|convert|10–15|C}} (standard temperature range conversion) When expressing a temperature change (e.g., "The temperature increased by 10 °C"), or when comparing temperatures (e.g., "10 to 15 °C warmer"), we cannot use the standard temperature units (Template:Para, Template:Para and Template:Para), which refer to points on the respective scale. Instead, we must use one of the following "units of difference": Template:Para, Template:Para and Template:Para. Compare the following two examples with the two above: {{#invoke:DemoTemplate|convert|10|C-change}} increase in temperature {{#invoke:DemoTemplate|convert|10–15|C-change}} warmer than normal To produce multiple units in the output: {{#invoke:DemoTemplate|convert|10|C-change|F-change K-change}} difference Multiple units: 1 ft 5 in In input Base document Template:Slink lists options for multiple unit input (like ft,in). It can catch predefined sets only (units that can be subdivided; e.g., yd into ft): {{convert|1|yd|2|ft|3|in}} → {{convert|2|ft|3|in|cm}} → {{convert|1|lb|5|oz|g}} → In output Available multiple-unit output options predefined, like ftin and ydftin. The full list is at Template:Slink. {{convert|2|m|ftin}} → {{convert|2|m|ft in}} → , using a space, returns the decimal point Default behaviour, for comparison: {{convert|2|m}} → See also: Template:Tl a length used to measure horses Template:Tl a weight in ton, cwt, qr and lb Currency per unit: $/mi → $/km Using currency symbols in a $ per unit value, you can convert the per-unit: {{convert|10|$/mi|$/km}} → {{convert|1500|$/ozt|$/g}} → You can set the currency in both values using Template:Para: {{convert|10|$/mi|$/km|$=€}} → It is not possible to convert the currency. So, this result (mixed currencies) is not possible: Template:!mxt Template:Nay Using convert inside templates For usage in template code, like infoboxes, Template:Tlf has these options: Pre-formatting fraction input Module:Convert/helper can read regular input and pre-format it into Template:Tlf-accepted input. Your template can accept Template:Para and use {{#invoke:Convert/helper|number|16 7/8}} → {{#invoke:Convert/helper|number|16 7/8}} Using a Wikidata property Adding the Wikidata property code, like code Template:Para, to your template code automatically returns the Wikidata property for that article, and convert it. Both number and unit are read. Note: to return that property value for an other article, use Template:Para. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) {{convert|input=P2073|qid=Q1056131|ftin|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on|disp=out}} → For example see template:Infobox Telescope. Sometimes a property may have more than one value against it in Wikidata. You can use the Template:Para parameter to specify which of the values you want to use. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) Template:Wikidata entity link: {{convert|input=P2386|qual=Q613628|ft|abbr=on}} → Template:Wikidata entity link: {{convert|input=P2386|qual=Q1395645|ft|abbr=on}} → Parameter list Deprecated options TemplateData <templatedata> { "description": "Converts measurements to other units.", "params": { "1": { "label": "Value", "description": "The value to convert.", "type": "number", "required": true }, "2": { "label": "From unit", "description": "The unit for the provided value.", "type": "string", "example": "km", "required": true }, "3": { "label": "To units", "description": "The units to convert into. Separate units by a space for multiple outputs. In an output unit, use + for a multiplication space.", "type": "string", "example": "mi nmi", "suggested": true }, "4": { "label": "Precision or suffix", "description": "Significant digits after decimal dot or, if negative, exponent of ten.", "type": "number" }, "lk": { "label": "Link units", "description": "Indication of what units to apply wikilinks to. Use “on” for all, “in” for the input unit, “out” for the output units, or “off” for none of the units.", "default": "off", "type": "string", "example": "on" }, "abbr": { "label": "Abbreviation", "description": "Display for the units: “on” to display all units using their unit symbols, “off” to display all units in full words, “in” to display the unit symbol for the input unit, “out” to display the unit symbols for the output units, “unit” to display unit symbols for both input and output units when using scientific notation, “values” for no units at all (neither unit symbols nor full words of units).", "default": "out", "type": "string", "example": "on, unit, in, out, off", "suggested": true }, "sp": { "label": "Spelling", "description": "Spelling of units. Use “us” to display unit names using U.S. spelling.", "type": "string", "example": "us" }, "adj": { "label": "Adjective", "description": "Whether to use adjectival form. Use “on” for singular unit name appended by a hyphen, “mid” to put conversion at end, or “off” (default) for no adjectival form.", "type": "unbalanced-wikitext", "example": "on", "default": "off" }, "disp": { "label": "Conversion", "description": "Display conversion result: “or”: after ‘or’, “x”: with custom prefix and suffix, “b”: in parentheses, “table”/“tablecen”, “output only”: alone, “output number only”: alone and without unit, “unit”: not at all but input unit; if the value is a number it is used as precision.", "type": "string", "example": "b" }, "order": { "label": "Ordering", "description": "“flip” returns converted value first, input value second.", "type": "string", "example": "flip" }, "sigfig": { "label": "Significant figures", "description": "Indicates the number of significant figures to be used in rounding.", "type": "number" }, "round": { "label": "Rounding output", "description": "The type of rounding. “5” rounds the output number to nearest multiple of 5, “25” to nearest multiple of 25, “each” rounds each number in a range.", "type": "number" }, "comma": { "label": "Thousands separator", "description": "Sets or suppresses the use of thousands separators in the numbers. “off”: no separator; “gaps”: use space instead of comma as thousands separator; “5”: only add thousands separator when the integral part of the number uses 5 positions or more (10,000 or more; if using comma as thousands separator, 1234 would produce '1234', 12345 would produce '12,345').", "default": "on", "type": "string", "example": "off" }, "sortable": { "label": "Sort key", "description": "“on” generates a hidden sort key", "type": "string", "example": "on" }, "spell": { "label": "Spell numbers?", "description": "If used, spells input or input and output numbers in words, optionally capitalizing the first", "example": "'in', 'In', 'on', or 'On'", "type": "string" }, "sing": { "type": "string", "deprecated": "use adj=", "label": "Singular?", "description": "If 'yes', uses singular form of units (deprecated)", "example": "yes" }, "frac": { "label": "Fraction?", "description": "fraction as rounding unit", "type": "number" }, "$": { "label": "Currency symbol", "description": "sets currency symbol in both units", "example": "$=€ will show \" €10 per mile (€6.2/km)\"", "type": "string" }, "input": { "label": "WD property", "description": "Reads the property value of the item (article), then converts it", "example": " (P2046=area)", "type": "string" } }, "format": "inline" } </templatedata> See also Template:Temp Template:Temp Template:Temp to convert historical prices to their current equivalent. Template:Convert navs Template:Sandbox other at 2800 rpm
1963-1965	4-Barrel Carb	Template:Documentation subpage Template:Hatnote {{#ifeq:Engine|Template:Convert|Template:High-risk}} Template:Transwiki guide Template:Lua Template Template:Tl calculates from one measurement unit to another one, and then presents the results formatted. The complete list of unit symbols recognized by the template is at Module:Convert/documentation/conversion data. For example: {{convert|2|km|mi}} → (km entered, so converted into mile) {{convert|7|mi|km}} → (mi entered, so converted into km) Numbers can be rounded, units can be abbreviated into symbols: {{convert|2|km|mi|2|abbr=on}} → {{convert|7|mi|km|2|abbr=on}} → Value ranges can be entered using |to|... or |-|...: {{convert|2|to|5|km|mi}} → {{convert|2|-|5|km|mi}} → Combined effect example: {{convert|2|-|5|km|mi|2|abbr=on}} → {{convert|2|and|5|km|mi|sigfig=3|abbr=off}} → Units to convert Template:Hatnote Enter units to convert from into: {{convert|1|lb|kg}} → SI units generally accept prefixes, like "m" for milli (10−3), and "M" for mega (106) For "per" units, use "/" (slash): kg/ha For three-unit units, etc., see Template:Cl Unit name or symbol (abbreviation): 1 pound or 1 lb? By default, the first quantity shows the unit name, the second shows the symbol (or abbreviation): {{convert|1|lb|kg}} → Using Template:Para is the reverse behaviour to the default: {{convert|1|lb|kg|abbr=in}} → To abbreviate both or neither: {{convert|1|lb|kg|abbr=on}} → {{convert|1|lb|kg|abbr=off}} → Convenience: Template:Tlf has Template:Para by default Template Template:Tl is the same as Template:Tlf, except that it has Template:Para as the default behaviour. In Template:Tlf, all other options are available. So: {{cvt|1|lb|kg}} → Template:Cvt is equivalent to: {{convert|1|lb|kg|abbr=on}} → Template:Cvt Adjective: a 10-mile distance Use Template:Para to produce the adjectival (hyphenated) form: A {{convert|10|mi|km|adj=on}} distance → A distance. Default behaviour, for comparison: {{convert|10|mi|km}} to go → to go. Template:Para does not produce hyphens with unit symbols, as per Manual of Style: A {{convert|9|in|cm|adj=on|abbr=on}} nail → A nail. Template:AnchorRounding: 100 ft is 30 m or 30.5 m or 30.48 m? Template:Hatnote By definition, 100 ft equals . In practical use, it is common to round the calculated metric number. With that, there are several possibilities. Default rounding By Template:Tlf default, the conversion result will be rounded either to precision comparable to that of the input value (the number of digits after the decimal point—or the negative of the number of non-significant zeroes before the point—is increased by one if the conversion is a multiplication by a number between 0.02 and 0.2, remains the same if the factor is between 0.2 and 2, is decreased by 1 if it is between 2 and 20, and so on) or to two significant digits, whichever is more precise. An exception to this is rounding temperatures (see below). Examples of rounding Input Displays as Note {{convert|123|ft|m|-1}} {{convert|123|ft|m}} same output as with 0 (below) {{convert|123|ft|m|0}} {{convert|123|ft|m|1}} {{convert|123|ft|m|2}} The more-exact value is 37.4904 m or so, which gets converted to 37 m if this parameter is not specified at all. {{convert|500|ft|m|-1}} {{convert|500|ft|m}} same output as with −1 (above), because the conversion factor is between 0.2 and 2 (hence, it should produce same double-zero precision (−2) as in the input value), but the conversion must produce two significant digits at a minimum (hence, a higher single-zero precision (−1) is used) {{convert|500|ft|m|0}} {{convert|500|ft|m|1}} {{convert|500|ft|m|2}} exact value is 152.4 m {{convert|500|ft|cm|-3}} {{convert|500|ft|cm}} same output as with −3 (above), because the conversion factor is between 20 and 200 (hence, it should decrease input value's double-zero precision (−2) by 2), but the conversion must produce two significant digits at a minimum (hence, a higher triple-zero precision (−3) is used) {{convert|500|ft|cm|0}} Convert supports four types of rounding: Round to a given precision: use a precision number Specify the desired precision with the fourth unnamed parameter (or third unnamed parameter if the "convert to" parameter is omitted; or fifth unnamed parameter if a range is specified; or fourth unnamed parameter again if a range is specified and the "convert to" parameter is omitted; needs to be replaced with a "precision" named parameter). The conversion is rounded off to the nearest multiple of Template:Frac to the power of this number. For instance, if the result is 8621 and the round number is "-2", the result will be 8600. If the result is "234.0283043" and the round number is "0", the result will be 234. Round to a given number of significant figures: Template:Para To specify the output number to be with n significant figures use Template:Para: {{convert|1200|ft|m|sigfig=4}} → {{convert|1200|ft|m|sigfig=3}} → {{convert|1200|ft|m|sigfig=2}} → {{convert|1200|ft|m|sigfig=1}} → Default behaviour, for comparison: {{convert|1200|ft|m}} → Setting Template:Para to a value less than 1 is meaningless: {{convert|1200|ft|m|sigfig=0}} → Template:Nay Round to a multiple of 5: 15, 20, 25, ... Using Template:Para rounds the outcome to a multiple of 5. {{convert|10|m|ft}} → {{convert|10|m|ft|round=5}} → Similar: using Template:Para rounds the outcome to a multiple of 25. {{convert|10|m|ft}} → {{convert|10|m|ft|round=25}} → Default behaviour, for comparison: {{convert|10|m|ft|sigfig=4}} → In a range, one can round each value individually to the default. Use Template:Para: {{convert|10 x 200 x 3000|m|ft}} → {{convert|10 x 200 x 3000|m|ft|round=each}} → Round to a multiple of a given fraction: Template:Frac inch Specify the desired denominator using Template:Para. (Denominator is the below-the-slash number, for example the 3 in Template:Frac). {{convert|5.56|cm|in|frac=16}} → {{convert|8|cm|in|frac=4}} → The fraction is reduced when possible: {{convert|8|cm|in|frac=100}} → Default behaviour uses decimal notation: {{convert|5.56|cm|in}} → Template:AnchorRounding temperatures: °C, °F and K In temperatures, the conversion will be rounded either to the precision comparable to that of the input value or to that which would give three significant figures when expressed in kelvins, whichever is more precise. {{#invoke:DemoTemplate|convert|10,000|C|F K}} {{#invoke:DemoTemplate|convert|10,000.1|C|F K}} {{#invoke:DemoTemplate|convert|-272|C|F K}} {{#invoke:DemoTemplate|convert|-272|C}} {{#invoke:DemoTemplate|convert|100|C|F K}} {{#invoke:DemoTemplate|convert|0|C|F K}} The precision of the input number in example (1) is one digit, but the precision of its Kelvins expression is three, so the precision of the Fahrenheit conversion is made three (made 180...) . (1) and (2) seem to belie the fact that a , and make the 32 degrees difference shown in (1) begin to seem off somehow. Result (1) seems off until you set the significant figures yourself with Template:Para: {{#invoke:DemoTemplate|convert|10000|C|sigfig=5}} or you set the precision positionally, relative to the decimal point (zero being at the decimal point): {{#invoke:DemoTemplate|convert|10000|C|0}} The precision of the input number in example (2) is six, so the precision of the Fahrenheit output is, whereas before, Kelvins had determined it to be three. Examples (3) and (4) show how this can be hidden and generate questions, but it occurs there because the Kelvins conversion generated two fractional parts. (Before it was the input number that generated the fractional part.) In example (3) the three input digits converted into five significant output digits because of the two digits after the decimal point, generated by the Kelvins conversion. This happened again in (5), but in (6) decimal fractions were neither given as input nor induced by the Kelvins conversion. Rounding input There is limited support for rounding the displayed input number. The rounding takes place after conversion, so the output is based on the full-precision input. This is useful when the input is produced by Template:Tlc or otherwise available to a higher precision than is usefully displayed, and it's desirable to avoid double-rounding. To round the input to a specified number of digits after the decimal point, use one of the parameters: Template:Para Template:Para Template:Para Template:Para Note that there is no Template:ParaTemplate:Nay or similar for rounding above the decimal place. Neither is there support for significant figures, multiples of 5, or any other output-rounding feature. The default precision is computed based on the input, so an explicit output precision must usually be supplied: Template:Tlc → Template:Nay (precisions are mismatched) Template:Tlc → Template:Aye In this case, if the input were rounded before conversion, a different result would be obtained: Template:Tlc → Template:Nay (double rounding) Into multiple units: Separate the multiple output units by a space: {{convert|10|C|F K}} → {{convert|5|km|mi nmi}} → If the output unit names contain spaces, use + as the separator. See also: For multiple-unit options like 1 ft 5 in, see Template:Section link and Template:Section link. Ranges of values Template:For A range converts two values and separates them by your choice of words and punctuation. A range: 6 to 17 kg (13 to 37 lb) Range indicators are entered as the second parameter (between the values). Range separators can be: Template:Convert/doc/range separator list Multiple dimensions: Use by: {{convert|6|by|12|ft|m}} → Use ×, multiplication sign, or x, letter: {{convert|6|x|12|m|ft}} → In science, the formal way is to set |x| and Template:Para (keeping dimensions right, like in area = x km2): {{convert|6|x|12|m|ft|abbr=on}} → Lists of values: 20, 40, or 60 miles {{convert|20|,|40|, or|60|mi}} → About feet, inch in ranges and multiples While it is possible to enter feet, inch in a simple conversion, this is not possible for ranges: {{convert|1|ft|3|in|x|3|ft|5|in|mm}} → Template:Nay Default behaviour, for comparison: {{convert|1|ft|3|in|mm}} → However, converting metric units into feet and inches with Template:Para can produce the desired output: {{convert|380|x|1040|mm|ftin|order=flip}} → Words Spelling of unit name: international metre or US meter? Default spelling of units is in the en (generic) locale. To show en-US spelling, use Template:Para: {{convert|1|m|ft}} → —default {{convert|1|m|ft|sp=us}} → Spell out numbers: ten miles To write a number in words, use Template:Para: {{convert|10|mi|m|spell=in}} → To spell out both in and out values, use Template:Para: {{convert|10|mi|m|spell=on}} → To make first letter a capital, use Template:Para, Template:Para {{convert|10|mi|m|spell=In}} → {{convert|10|mi|m|spell=On}} → Remember that the spelling of the units (ft, m) is independently set by Template:Para. To the extreme: {{convert|10|mi|m|spell=on|abbr=off|sp=us}} → Inserted before units: 4 planted acres {{convert|4|acre||adj=pre|planted}} → disp=preunit is similar, but has no separator after the specified text, and can have different text for the output value: {{convert|4|acre||disp=preunit|planted }} → {{convert|4|acre||disp=preunit|planted |reforested-}} → After adjective unit: A corridor Note that two units (in this case, ft and m) are required. Use with just one unit will generate an error message. {{convert|10|ft|m|adj=mid|-long}} → Plurals: 1 inch, 2 inches The unit symbol is singular always. Depending on the preceding number only, a unit name can be shown plural. {{convert|1|metre}} → {{convert|2|metre}} → {{convert|2|metre|abbr=on}} → Exception Entering the unit spelled |foot| forces singular output "foot", whatever the number is. {{convert|100|foot|abbr=off}} → Fractions: one-eighth of an imperial pint The convert template also supports spelling out fractions. {{convert|3+1/2|oz|g|spell=in}} → Any additional words needed for the fraction can also be added at the end of the template. {{convert|1/8|imppt|ml|spell=in|adj=pre|of an}} → Wrapping and line breaking See Template:Section link Spelling out "thousands", "millions", etc. Most unit codes accept a prefix of e3 (thousand) or e6 (million) or e9 (billion). {{convert|100|e6mi|e6km}} → {{convert|120|e6acre}} → {{convert|120|e6acre|e3km2}} → To display both input and output in scientific notation, use Template:Para {{convert|100|e6mi|e6km|abbr=on}} → To spell out "thousands", "millions", etc., Template:Para abbreviates the unit; Template:Para displays both full unit names. {{convert|100|e6mi|e6km|abbr=unit}} → {{convert|100|e6mi|e6km|abbr=off}} → Numbers Using an SI prefix: gigametre (Gm), or micrometre (μm) Template:Sidebar metric prefixes (small) Units can have an SI prefix like G before the unit: Gm, and giga before the name: gigametre. These are plain multiplication factors. To illustrate, these are trivial calculations (from metre to metre), showing the multiplication factor: The prefix can be added before the SI unit (here: unit m for metre): {{convert|12|Gm|mi|abbr=on}} → Mm: km: mm: μm: um: (letter "u" can be used for "μ" here) The prefix can be used in the output unit: {{convert|12000|mi|Mm|abbr=on}} → {{convert|12|in|μm|abbr=on}} → As an exception, the non-SI unit "inch" can have the "μ" prefix too: {{convert|12|μm|μin|abbr=on}} → Engineering notation: 7 × 106 m In the unit: e6m Engineering notation can be entered as a "prefix" to the unit: {{convert|70|e6m}} → The same is possible for the output unit: {{convert|23,000,000|ft|e6m}} → Any standard unit (not a combination, multiple, or built-in unit) can have such a prefix: e3 (thousand), e6 (million), e9 (billion), e12 (trillion), e15 (quadrillion). Scientific notation: 1.23 × 10−14 In scientific notation, a number is written like Template:Rnd. The plain number has exactly one digit before the decimal point. With Template:Tlf, the input can be in e-notation such as 12.3e4. This value is displayed as a power of ten, and the output is displayed in scientific notation, except that an output value satisfying 0.01 <= v < 1000 is shown as a normal number. In addition, if the output value is 1000 and sigfig=4 is used, the value is displayed as a normal number. {{convert|12.3e-15|atm|atm|abbr=on}} → {{convert|0.00000005|atm|atm|abbr=on}} → Input with fractions: The number to convert can be written in fractions. Both / (keyboard slash) and ⁄ (fraction slash) are accepted: {{convert|1/2|in|mm|1}} → {{convert|1⁄2|in|mm|1}} → With positive mixed numbers (a positive integer and a fraction), use a + sign {{convert|2+1⁄2|in|mm|1}} → With negative mixed numbers, use a hyphen - and repeat it: {{convert|-2-1⁄2|in|mm|1}} → Note that the following cases are not interpreted as mixed numbers: {{convert|2-1⁄2|in|mm|1}} → . This is interpreted as a range from 2 inches to 1⁄2 inch. {{convert|-2+1⁄2|in|mm|1}} → Template:Nay This is neither a mixed number nor a range, and mathematical expressions requiring calculations are not allowed here. Horizontal fraction bar: Template:Sfrac inch Using a double slash (//) provides a horizontal fraction bar for the original (input) unit: {{convert|1//2|in|mm|1}} → {{convert|6+3//8|in|mm|1}} → Using a negative value for Template:Para provides a horizontal fraction bar for the converted (output) unit: {{convert|12.7|mm|frac=-2}} → {{convert|161.9|mm|frac=-8}} → Thousands separator: 1,000 mi or 1000 mi In input, a comma for thousands separator is accepted but not required; a gap (space) is not accepted. In output, by default, the thousand separator is the comma: {{convert|1234567|m|ft}} → {{convert|1,234,567|m|ft}} → Set Template:Para to remove the separator from the output: {{convert|1234567|m|ft|comma=off}} → Use Template:Para to use digit grouping by gap (thin space) as a thousands separator: {{convert|1234567|m|ft|comma=gaps}} → Default behaviour, for comparison: {{convert|1234567|m|ft}} → Setting Template:Para will only add the separator when the number of digits is 5 or more: {{convert|1234|m|ft|comma=5}} → {{convert|1234567|m|ft|comma=5}} → Default behaviour, for comparison: {{convert|1234|m|ft}} → Output manipulation Brackets and separators: 10 m [33 ft] Punctuation that distinguishes the two measurements is set by Template:Para. Options are: b (the default), sqbr, comma, or, br, x|…: {{convert|10|m|ft|disp=sqbr}} → {{convert|10|m|ft|disp=comma}} → {{convert|10|m|ft|disp=or}} → Default behaviour, for comparison: {{convert|10|m|ft}} → Setting Template:Para will force a new line (<br/>) {{convert|10|m|ft|disp=br}} → Also Template:Para will force a new line, and keep the brackets (useful in tables): {{convert|10|m|ft|disp=br()}} → Setting Template:Para allows any text as separator: {{convert|10|m|ft|disp=x|_MyText_}} → (To display spaces, use &nbsp;) Flipping (reordering) the two measurements: Setting Template:Para will flip (swap) the two measurements: {{convert|1|mi|m|order=flip}} → Default behaviour, for comparison: {{convert|1|mi|m}} → When converting to multiple units, the effect is: {{convert|10|km|mi nmi|order=flip}} → {{convert|10|km|nmi mi|order=flip}} → Fixed ordering of output units: Setting Template:Para shows the output-units as ordered; the input unit is skipped: {{convert|100|C|F C K|abbr=on|order=out}} → {{convert|200|PS|kW hp|0|abbr=on|order=out}} → See also: § Displaying parts of the output. Displaying parts of the result: It is possible to display only parts of the conversion result: Convert Output Returns {{convert|2|cuyd|m3}} Regular output (for comparison) {{convert|2|cuyd|m3|abbr=values}} Input and output numbers {{convert|2|cuyd|m3|disp=unit}} Input unit {{convert|2|cuyd|m3|disp=unit|adj=on}} Input unit, adjective (hyphenated) {{convert|2|cuyd|cuyd|disp=out}} Input (workaround. Template:Nowrap) {{convert|2|cuyd|m3|abbr=~}} Input: both name and symbol {{convert|2|cuyd|m3|disp=unit2}} Output unit (symbol) {{convert|2|cuyd|m3|disp=unit2|abbr=off}} Output unit (name) {{convert|2|cuyd|m3|disp=number}} Output value {{convert|2|cuyd|m3|disp=out}} Output value and unit name {{convert|2|cuyd|m3|disp=out|abbr=off}} Output value and unit symbol Display both input name and symbol: 2 kilopascals [kPa] Setting Template:Para returns both name and symbol of the first (input) unit: {{convert|2|kPa|psi|abbr=~}} → A {{convert|2|kPa|psi|abbr=~|adj=on}} pressure → Template:Nowrap Table options For the wikitable structure, there are three options: add a line-break, split the result over columns and make the table sortable. Enforced line break Template:Para adds a line-break and omits brackets. Template:Para adds a line-break and does add brackets to the converted value. This may be useful in tables: Template:Para Template:Para Table columns Using {convert} in a table cell, with Template:Para splits the result over two (or more) columns. By default units are not included in the table, however, they can be added using the Template:Para parameter. Multiple-unit outputs, like ftin, always output their units to the table. {{convert|10|m|ft|disp=table}} → Template:Para does the same, and also centers the text: {{convert|20|m|ft|disp=tablecen}} → The units are added as a column header:   kilograms pounds stone and pounds Template:Para Template:Para and Template:Para Template:Para and Template:Para Template:Para Template:Para (default) Sorting Use Template:Para to include a hidden numerical sortkey in the output, suitable for use in a table with sortable columns. Technically, this places a hidden string before the actual displayed values: {{convert|10|m|ft|sortable=on}} Template:Nowrap showing: . Use both Template:Para and Template:Para together to produce table columns (pipe symbols) for each value in sortable columns: m ft A B C D The generated sortkey is calculated in a consistent way based on both the value and its unit as passed to the convert template. In most cases convert uses the passed value converted to SI base units. It is therefore not necessarily the displayed value or other alternate units and is calculated regardless of output format options. Using different units or different order of units in individual rows should therefore not lead to incorrect sorting, although variations in rounding can give surprising results, since an unrounded number is used for the sortkey. Units The conversion factors and physical constants are sourced here. All units Template:Anchor'per' units: kg/hl, miles per gallon When using a slash (/), a unit like kg/hl is recognized as kilograms per hectolitre and will be converted with other mass/volume units. {{convert|1000|kg/hl}} → Population density (inhabitants per square mile) can be converted using {{convert|10|PD/sqmi|PD/km2}} → Vehicular fuel efficiency, commonly expressed in miles per gallon or litres per 100 km can also be converted {{convert|26|mpgUS|l/100km mpgimp}} → Template:AnchorUnits of difference: Expressing a change or difference in temperature We have already discussed standard temperature conversions (°C, °F, K), as shown in these two examples: {{#invoke:DemoTemplate|convert|10|C}} (standard temperature conversion) {{#invoke:DemoTemplate|convert|10–15|C}} (standard temperature range conversion) When expressing a temperature change (e.g., "The temperature increased by 10 °C"), or when comparing temperatures (e.g., "10 to 15 °C warmer"), we cannot use the standard temperature units (Template:Para, Template:Para and Template:Para), which refer to points on the respective scale. Instead, we must use one of the following "units of difference": Template:Para, Template:Para and Template:Para. Compare the following two examples with the two above: {{#invoke:DemoTemplate|convert|10|C-change}} increase in temperature {{#invoke:DemoTemplate|convert|10–15|C-change}} warmer than normal To produce multiple units in the output: {{#invoke:DemoTemplate|convert|10|C-change|F-change K-change}} difference Multiple units: 1 ft 5 in In input Base document Template:Slink lists options for multiple unit input (like ft,in). It can catch predefined sets only (units that can be subdivided; e.g., yd into ft): {{convert|1|yd|2|ft|3|in}} → {{convert|2|ft|3|in|cm}} → {{convert|1|lb|5|oz|g}} → In output Available multiple-unit output options predefined, like ftin and ydftin. The full list is at Template:Slink. {{convert|2|m|ftin}} → {{convert|2|m|ft in}} → , using a space, returns the decimal point Default behaviour, for comparison: {{convert|2|m}} → See also: Template:Tl a length used to measure horses Template:Tl a weight in ton, cwt, qr and lb Currency per unit: $/mi → $/km Using currency symbols in a $ per unit value, you can convert the per-unit: {{convert|10|$/mi|$/km}} → {{convert|1500|$/ozt|$/g}} → You can set the currency in both values using Template:Para: {{convert|10|$/mi|$/km|$=€}} → It is not possible to convert the currency. So, this result (mixed currencies) is not possible: Template:!mxt Template:Nay Using convert inside templates For usage in template code, like infoboxes, Template:Tlf has these options: Pre-formatting fraction input Module:Convert/helper can read regular input and pre-format it into Template:Tlf-accepted input. Your template can accept Template:Para and use {{#invoke:Convert/helper|number|16 7/8}} → {{#invoke:Convert/helper|number|16 7/8}} Using a Wikidata property Adding the Wikidata property code, like code Template:Para, to your template code automatically returns the Wikidata property for that article, and convert it. Both number and unit are read. Note: to return that property value for an other article, use Template:Para. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) {{convert|input=P2073|qid=Q1056131|ftin|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on|disp=out}} → For example see template:Infobox Telescope. Sometimes a property may have more than one value against it in Wikidata. You can use the Template:Para parameter to specify which of the values you want to use. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) Template:Wikidata entity link: {{convert|input=P2386|qual=Q613628|ft|abbr=on}} → Template:Wikidata entity link: {{convert|input=P2386|qual=Q1395645|ft|abbr=on}} → Parameter list Deprecated options TemplateData <templatedata> { "description": "Converts measurements to other units.", "params": { "1": { "label": "Value", "description": "The value to convert.", "type": "number", "required": true }, "2": { "label": "From unit", "description": "The unit for the provided value.", "type": "string", "example": "km", "required": true }, "3": { "label": "To units", "description": "The units to convert into. Separate units by a space for multiple outputs. In an output unit, use + for a multiplication space.", "type": "string", "example": "mi nmi", "suggested": true }, "4": { "label": "Precision or suffix", "description": "Significant digits after decimal dot or, if negative, exponent of ten.", "type": "number" }, "lk": { "label": "Link units", "description": "Indication of what units to apply wikilinks to. Use “on” for all, “in” for the input unit, “out” for the output units, or “off” for none of the units.", "default": "off", "type": "string", "example": "on" }, "abbr": { "label": "Abbreviation", "description": "Display for the units: “on” to display all units using their unit symbols, “off” to display all units in full words, “in” to display the unit symbol for the input unit, “out” to display the unit symbols for the output units, “unit” to display unit symbols for both input and output units when using scientific notation, “values” for no units at all (neither unit symbols nor full words of units).", "default": "out", "type": "string", "example": "on, unit, in, out, off", "suggested": true }, "sp": { "label": "Spelling", "description": "Spelling of units. Use “us” to display unit names using U.S. spelling.", "type": "string", "example": "us" }, "adj": { "label": "Adjective", "description": "Whether to use adjectival form. Use “on” for singular unit name appended by a hyphen, “mid” to put conversion at end, or “off” (default) for no adjectival form.", "type": "unbalanced-wikitext", "example": "on", "default": "off" }, "disp": { "label": "Conversion", "description": "Display conversion result: “or”: after ‘or’, “x”: with custom prefix and suffix, “b”: in parentheses, “table”/“tablecen”, “output only”: alone, “output number only”: alone and without unit, “unit”: not at all but input unit; if the value is a number it is used as precision.", "type": "string", "example": "b" }, "order": { "label": "Ordering", "description": "“flip” returns converted value first, input value second.", "type": "string", "example": "flip" }, "sigfig": { "label": "Significant figures", "description": "Indicates the number of significant figures to be used in rounding.", "type": "number" }, "round": { "label": "Rounding output", "description": "The type of rounding. “5” rounds the output number to nearest multiple of 5, “25” to nearest multiple of 25, “each” rounds each number in a range.", "type": "number" }, "comma": { "label": "Thousands separator", "description": "Sets or suppresses the use of thousands separators in the numbers. “off”: no separator; “gaps”: use space instead of comma as thousands separator; “5”: only add thousands separator when the integral part of the number uses 5 positions or more (10,000 or more; if using comma as thousands separator, 1234 would produce '1234', 12345 would produce '12,345').", "default": "on", "type": "string", "example": "off" }, "sortable": { "label": "Sort key", "description": "“on” generates a hidden sort key", "type": "string", "example": "on" }, "spell": { "label": "Spell numbers?", "description": "If used, spells input or input and output numbers in words, optionally capitalizing the first", "example": "'in', 'In', 'on', or 'On'", "type": "string" }, "sing": { "type": "string", "deprecated": "use adj=", "label": "Singular?", "description": "If 'yes', uses singular form of units (deprecated)", "example": "yes" }, "frac": { "label": "Fraction?", "description": "fraction as rounding unit", "type": "number" }, "$": { "label": "Currency symbol", "description": "sets currency symbol in both units", "example": "$=€ will show \" €10 per mile (€6.2/km)\"", "type": "string" }, "input": { "label": "WD property", "description": "Reads the property value of the item (article), then converts it", "example": " (P2046=area)", "type": "string" } }, "format": "inline" } </templatedata> See also Template:Temp Template:Temp Template:Temp to convert historical prices to their current equivalent. Template:Convert navs Template:Sandbox other at 4600 rpm	Template:Documentation subpage Template:Hatnote {{#ifeq:Engine|Template:Convert|Template:High-risk}} Template:Transwiki guide Template:Lua Template Template:Tl calculates from one measurement unit to another one, and then presents the results formatted. The complete list of unit symbols recognized by the template is at Module:Convert/documentation/conversion data. For example: {{convert|2|km|mi}} → (km entered, so converted into mile) {{convert|7|mi|km}} → (mi entered, so converted into km) Numbers can be rounded, units can be abbreviated into symbols: {{convert|2|km|mi|2|abbr=on}} → {{convert|7|mi|km|2|abbr=on}} → Value ranges can be entered using |to|... or |-|...: {{convert|2|to|5|km|mi}} → {{convert|2|-|5|km|mi}} → Combined effect example: {{convert|2|-|5|km|mi|2|abbr=on}} → {{convert|2|and|5|km|mi|sigfig=3|abbr=off}} → Units to convert Template:Hatnote Enter units to convert from into: {{convert|1|lb|kg}} → SI units generally accept prefixes, like "m" for milli (10−3), and "M" for mega (106) For "per" units, use "/" (slash): kg/ha For three-unit units, etc., see Template:Cl Unit name or symbol (abbreviation): 1 pound or 1 lb? By default, the first quantity shows the unit name, the second shows the symbol (or abbreviation): {{convert|1|lb|kg}} → Using Template:Para is the reverse behaviour to the default: {{convert|1|lb|kg|abbr=in}} → To abbreviate both or neither: {{convert|1|lb|kg|abbr=on}} → {{convert|1|lb|kg|abbr=off}} → Convenience: Template:Tlf has Template:Para by default Template Template:Tl is the same as Template:Tlf, except that it has Template:Para as the default behaviour. In Template:Tlf, all other options are available. So: {{cvt|1|lb|kg}} → Template:Cvt is equivalent to: {{convert|1|lb|kg|abbr=on}} → Template:Cvt Adjective: a 10-mile distance Use Template:Para to produce the adjectival (hyphenated) form: A {{convert|10|mi|km|adj=on}} distance → A distance. Default behaviour, for comparison: {{convert|10|mi|km}} to go → to go. Template:Para does not produce hyphens with unit symbols, as per Manual of Style: A {{convert|9|in|cm|adj=on|abbr=on}} nail → A nail. Template:AnchorRounding: 100 ft is 30 m or 30.5 m or 30.48 m? Template:Hatnote By definition, 100 ft equals . In practical use, it is common to round the calculated metric number. With that, there are several possibilities. Default rounding By Template:Tlf default, the conversion result will be rounded either to precision comparable to that of the input value (the number of digits after the decimal point—or the negative of the number of non-significant zeroes before the point—is increased by one if the conversion is a multiplication by a number between 0.02 and 0.2, remains the same if the factor is between 0.2 and 2, is decreased by 1 if it is between 2 and 20, and so on) or to two significant digits, whichever is more precise. An exception to this is rounding temperatures (see below). Examples of rounding Input Displays as Note {{convert|123|ft|m|-1}} {{convert|123|ft|m}} same output as with 0 (below) {{convert|123|ft|m|0}} {{convert|123|ft|m|1}} {{convert|123|ft|m|2}} The more-exact value is 37.4904 m or so, which gets converted to 37 m if this parameter is not specified at all. {{convert|500|ft|m|-1}} {{convert|500|ft|m}} same output as with −1 (above), because the conversion factor is between 0.2 and 2 (hence, it should produce same double-zero precision (−2) as in the input value), but the conversion must produce two significant digits at a minimum (hence, a higher single-zero precision (−1) is used) {{convert|500|ft|m|0}} {{convert|500|ft|m|1}} {{convert|500|ft|m|2}} exact value is 152.4 m {{convert|500|ft|cm|-3}} {{convert|500|ft|cm}} same output as with −3 (above), because the conversion factor is between 20 and 200 (hence, it should decrease input value's double-zero precision (−2) by 2), but the conversion must produce two significant digits at a minimum (hence, a higher triple-zero precision (−3) is used) {{convert|500|ft|cm|0}} Convert supports four types of rounding: Round to a given precision: use a precision number Specify the desired precision with the fourth unnamed parameter (or third unnamed parameter if the "convert to" parameter is omitted; or fifth unnamed parameter if a range is specified; or fourth unnamed parameter again if a range is specified and the "convert to" parameter is omitted; needs to be replaced with a "precision" named parameter). The conversion is rounded off to the nearest multiple of Template:Frac to the power of this number. For instance, if the result is 8621 and the round number is "-2", the result will be 8600. If the result is "234.0283043" and the round number is "0", the result will be 234. Round to a given number of significant figures: Template:Para To specify the output number to be with n significant figures use Template:Para: {{convert|1200|ft|m|sigfig=4}} → {{convert|1200|ft|m|sigfig=3}} → {{convert|1200|ft|m|sigfig=2}} → {{convert|1200|ft|m|sigfig=1}} → Default behaviour, for comparison: {{convert|1200|ft|m}} → Setting Template:Para to a value less than 1 is meaningless: {{convert|1200|ft|m|sigfig=0}} → Template:Nay Round to a multiple of 5: 15, 20, 25, ... Using Template:Para rounds the outcome to a multiple of 5. {{convert|10|m|ft}} → {{convert|10|m|ft|round=5}} → Similar: using Template:Para rounds the outcome to a multiple of 25. {{convert|10|m|ft}} → {{convert|10|m|ft|round=25}} → Default behaviour, for comparison: {{convert|10|m|ft|sigfig=4}} → In a range, one can round each value individually to the default. Use Template:Para: {{convert|10 x 200 x 3000|m|ft}} → {{convert|10 x 200 x 3000|m|ft|round=each}} → Round to a multiple of a given fraction: Template:Frac inch Specify the desired denominator using Template:Para. (Denominator is the below-the-slash number, for example the 3 in Template:Frac). {{convert|5.56|cm|in|frac=16}} → {{convert|8|cm|in|frac=4}} → The fraction is reduced when possible: {{convert|8|cm|in|frac=100}} → Default behaviour uses decimal notation: {{convert|5.56|cm|in}} → Template:AnchorRounding temperatures: °C, °F and K In temperatures, the conversion will be rounded either to the precision comparable to that of the input value or to that which would give three significant figures when expressed in kelvins, whichever is more precise. {{#invoke:DemoTemplate|convert|10,000|C|F K}} {{#invoke:DemoTemplate|convert|10,000.1|C|F K}} {{#invoke:DemoTemplate|convert|-272|C|F K}} {{#invoke:DemoTemplate|convert|-272|C}} {{#invoke:DemoTemplate|convert|100|C|F K}} {{#invoke:DemoTemplate|convert|0|C|F K}} The precision of the input number in example (1) is one digit, but the precision of its Kelvins expression is three, so the precision of the Fahrenheit conversion is made three (made 180...) . (1) and (2) seem to belie the fact that a , and make the 32 degrees difference shown in (1) begin to seem off somehow. Result (1) seems off until you set the significant figures yourself with Template:Para: {{#invoke:DemoTemplate|convert|10000|C|sigfig=5}} or you set the precision positionally, relative to the decimal point (zero being at the decimal point): {{#invoke:DemoTemplate|convert|10000|C|0}} The precision of the input number in example (2) is six, so the precision of the Fahrenheit output is, whereas before, Kelvins had determined it to be three. Examples (3) and (4) show how this can be hidden and generate questions, but it occurs there because the Kelvins conversion generated two fractional parts. (Before it was the input number that generated the fractional part.) In example (3) the three input digits converted into five significant output digits because of the two digits after the decimal point, generated by the Kelvins conversion. This happened again in (5), but in (6) decimal fractions were neither given as input nor induced by the Kelvins conversion. Rounding input There is limited support for rounding the displayed input number. The rounding takes place after conversion, so the output is based on the full-precision input. This is useful when the input is produced by Template:Tlc or otherwise available to a higher precision than is usefully displayed, and it's desirable to avoid double-rounding. To round the input to a specified number of digits after the decimal point, use one of the parameters: Template:Para Template:Para Template:Para Template:Para Note that there is no Template:ParaTemplate:Nay or similar for rounding above the decimal place. Neither is there support for significant figures, multiples of 5, or any other output-rounding feature. The default precision is computed based on the input, so an explicit output precision must usually be supplied: Template:Tlc → Template:Nay (precisions are mismatched) Template:Tlc → Template:Aye In this case, if the input were rounded before conversion, a different result would be obtained: Template:Tlc → Template:Nay (double rounding) Into multiple units: Separate the multiple output units by a space: {{convert|10|C|F K}} → {{convert|5|km|mi nmi}} → If the output unit names contain spaces, use + as the separator. See also: For multiple-unit options like 1 ft 5 in, see Template:Section link and Template:Section link. Ranges of values Template:For A range converts two values and separates them by your choice of words and punctuation. A range: 6 to 17 kg (13 to 37 lb) Range indicators are entered as the second parameter (between the values). Range separators can be: Template:Convert/doc/range separator list Multiple dimensions: Use by: {{convert|6|by|12|ft|m}} → Use ×, multiplication sign, or x, letter: {{convert|6|x|12|m|ft}} → In science, the formal way is to set |x| and Template:Para (keeping dimensions right, like in area = x km2): {{convert|6|x|12|m|ft|abbr=on}} → Lists of values: 20, 40, or 60 miles {{convert|20|,|40|, or|60|mi}} → About feet, inch in ranges and multiples While it is possible to enter feet, inch in a simple conversion, this is not possible for ranges: {{convert|1|ft|3|in|x|3|ft|5|in|mm}} → Template:Nay Default behaviour, for comparison: {{convert|1|ft|3|in|mm}} → However, converting metric units into feet and inches with Template:Para can produce the desired output: {{convert|380|x|1040|mm|ftin|order=flip}} → Words Spelling of unit name: international metre or US meter? Default spelling of units is in the en (generic) locale. To show en-US spelling, use Template:Para: {{convert|1|m|ft}} → —default {{convert|1|m|ft|sp=us}} → Spell out numbers: ten miles To write a number in words, use Template:Para: {{convert|10|mi|m|spell=in}} → To spell out both in and out values, use Template:Para: {{convert|10|mi|m|spell=on}} → To make first letter a capital, use Template:Para, Template:Para {{convert|10|mi|m|spell=In}} → {{convert|10|mi|m|spell=On}} → Remember that the spelling of the units (ft, m) is independently set by Template:Para. To the extreme: {{convert|10|mi|m|spell=on|abbr=off|sp=us}} → Inserted before units: 4 planted acres {{convert|4|acre||adj=pre|planted}} → disp=preunit is similar, but has no separator after the specified text, and can have different text for the output value: {{convert|4|acre||disp=preunit|planted }} → {{convert|4|acre||disp=preunit|planted |reforested-}} → After adjective unit: A corridor Note that two units (in this case, ft and m) are required. Use with just one unit will generate an error message. {{convert|10|ft|m|adj=mid|-long}} → Plurals: 1 inch, 2 inches The unit symbol is singular always. Depending on the preceding number only, a unit name can be shown plural. {{convert|1|metre}} → {{convert|2|metre}} → {{convert|2|metre|abbr=on}} → Exception Entering the unit spelled |foot| forces singular output "foot", whatever the number is. {{convert|100|foot|abbr=off}} → Fractions: one-eighth of an imperial pint The convert template also supports spelling out fractions. {{convert|3+1/2|oz|g|spell=in}} → Any additional words needed for the fraction can also be added at the end of the template. {{convert|1/8|imppt|ml|spell=in|adj=pre|of an}} → Wrapping and line breaking See Template:Section link Spelling out "thousands", "millions", etc. Most unit codes accept a prefix of e3 (thousand) or e6 (million) or e9 (billion). {{convert|100|e6mi|e6km}} → {{convert|120|e6acre}} → {{convert|120|e6acre|e3km2}} → To display both input and output in scientific notation, use Template:Para {{convert|100|e6mi|e6km|abbr=on}} → To spell out "thousands", "millions", etc., Template:Para abbreviates the unit; Template:Para displays both full unit names. {{convert|100|e6mi|e6km|abbr=unit}} → {{convert|100|e6mi|e6km|abbr=off}} → Numbers Using an SI prefix: gigametre (Gm), or micrometre (μm) Template:Sidebar metric prefixes (small) Units can have an SI prefix like G before the unit: Gm, and giga before the name: gigametre. These are plain multiplication factors. To illustrate, these are trivial calculations (from metre to metre), showing the multiplication factor: The prefix can be added before the SI unit (here: unit m for metre): {{convert|12|Gm|mi|abbr=on}} → Mm: km: mm: μm: um: (letter "u" can be used for "μ" here) The prefix can be used in the output unit: {{convert|12000|mi|Mm|abbr=on}} → {{convert|12|in|μm|abbr=on}} → As an exception, the non-SI unit "inch" can have the "μ" prefix too: {{convert|12|μm|μin|abbr=on}} → Engineering notation: 7 × 106 m In the unit: e6m Engineering notation can be entered as a "prefix" to the unit: {{convert|70|e6m}} → The same is possible for the output unit: {{convert|23,000,000|ft|e6m}} → Any standard unit (not a combination, multiple, or built-in unit) can have such a prefix: e3 (thousand), e6 (million), e9 (billion), e12 (trillion), e15 (quadrillion). Scientific notation: 1.23 × 10−14 In scientific notation, a number is written like Template:Rnd. The plain number has exactly one digit before the decimal point. With Template:Tlf, the input can be in e-notation such as 12.3e4. This value is displayed as a power of ten, and the output is displayed in scientific notation, except that an output value satisfying 0.01 <= v < 1000 is shown as a normal number. In addition, if the output value is 1000 and sigfig=4 is used, the value is displayed as a normal number. {{convert|12.3e-15|atm|atm|abbr=on}} → {{convert|0.00000005|atm|atm|abbr=on}} → Input with fractions: The number to convert can be written in fractions. Both / (keyboard slash) and ⁄ (fraction slash) are accepted: {{convert|1/2|in|mm|1}} → {{convert|1⁄2|in|mm|1}} → With positive mixed numbers (a positive integer and a fraction), use a + sign {{convert|2+1⁄2|in|mm|1}} → With negative mixed numbers, use a hyphen - and repeat it: {{convert|-2-1⁄2|in|mm|1}} → Note that the following cases are not interpreted as mixed numbers: {{convert|2-1⁄2|in|mm|1}} → . This is interpreted as a range from 2 inches to 1⁄2 inch. {{convert|-2+1⁄2|in|mm|1}} → Template:Nay This is neither a mixed number nor a range, and mathematical expressions requiring calculations are not allowed here. Horizontal fraction bar: Template:Sfrac inch Using a double slash (//) provides a horizontal fraction bar for the original (input) unit: {{convert|1//2|in|mm|1}} → {{convert|6+3//8|in|mm|1}} → Using a negative value for Template:Para provides a horizontal fraction bar for the converted (output) unit: {{convert|12.7|mm|frac=-2}} → {{convert|161.9|mm|frac=-8}} → Thousands separator: 1,000 mi or 1000 mi In input, a comma for thousands separator is accepted but not required; a gap (space) is not accepted. In output, by default, the thousand separator is the comma: {{convert|1234567|m|ft}} → {{convert|1,234,567|m|ft}} → Set Template:Para to remove the separator from the output: {{convert|1234567|m|ft|comma=off}} → Use Template:Para to use digit grouping by gap (thin space) as a thousands separator: {{convert|1234567|m|ft|comma=gaps}} → Default behaviour, for comparison: {{convert|1234567|m|ft}} → Setting Template:Para will only add the separator when the number of digits is 5 or more: {{convert|1234|m|ft|comma=5}} → {{convert|1234567|m|ft|comma=5}} → Default behaviour, for comparison: {{convert|1234|m|ft}} → Output manipulation Brackets and separators: 10 m [33 ft] Punctuation that distinguishes the two measurements is set by Template:Para. Options are: b (the default), sqbr, comma, or, br, x|…: {{convert|10|m|ft|disp=sqbr}} → {{convert|10|m|ft|disp=comma}} → {{convert|10|m|ft|disp=or}} → Default behaviour, for comparison: {{convert|10|m|ft}} → Setting Template:Para will force a new line (<br/>) {{convert|10|m|ft|disp=br}} → Also Template:Para will force a new line, and keep the brackets (useful in tables): {{convert|10|m|ft|disp=br()}} → Setting Template:Para allows any text as separator: {{convert|10|m|ft|disp=x|_MyText_}} → (To display spaces, use &nbsp;) Flipping (reordering) the two measurements: Setting Template:Para will flip (swap) the two measurements: {{convert|1|mi|m|order=flip}} → Default behaviour, for comparison: {{convert|1|mi|m}} → When converting to multiple units, the effect is: {{convert|10|km|mi nmi|order=flip}} → {{convert|10|km|nmi mi|order=flip}} → Fixed ordering of output units: Setting Template:Para shows the output-units as ordered; the input unit is skipped: {{convert|100|C|F C K|abbr=on|order=out}} → {{convert|200|PS|kW hp|0|abbr=on|order=out}} → See also: § Displaying parts of the output. Displaying parts of the result: It is possible to display only parts of the conversion result: Convert Output Returns {{convert|2|cuyd|m3}} Regular output (for comparison) {{convert|2|cuyd|m3|abbr=values}} Input and output numbers {{convert|2|cuyd|m3|disp=unit}} Input unit {{convert|2|cuyd|m3|disp=unit|adj=on}} Input unit, adjective (hyphenated) {{convert|2|cuyd|cuyd|disp=out}} Input (workaround. Template:Nowrap) {{convert|2|cuyd|m3|abbr=~}} Input: both name and symbol {{convert|2|cuyd|m3|disp=unit2}} Output unit (symbol) {{convert|2|cuyd|m3|disp=unit2|abbr=off}} Output unit (name) {{convert|2|cuyd|m3|disp=number}} Output value {{convert|2|cuyd|m3|disp=out}} Output value and unit name {{convert|2|cuyd|m3|disp=out|abbr=off}} Output value and unit symbol Display both input name and symbol: 2 kilopascals [kPa] Setting Template:Para returns both name and symbol of the first (input) unit: {{convert|2|kPa|psi|abbr=~}} → A {{convert|2|kPa|psi|abbr=~|adj=on}} pressure → Template:Nowrap Table options For the wikitable structure, there are three options: add a line-break, split the result over columns and make the table sortable. Enforced line break Template:Para adds a line-break and omits brackets. Template:Para adds a line-break and does add brackets to the converted value. This may be useful in tables: Template:Para Template:Para Table columns Using {convert} in a table cell, with Template:Para splits the result over two (or more) columns. By default units are not included in the table, however, they can be added using the Template:Para parameter. Multiple-unit outputs, like ftin, always output their units to the table. {{convert|10|m|ft|disp=table}} → Template:Para does the same, and also centers the text: {{convert|20|m|ft|disp=tablecen}} → The units are added as a column header:   kilograms pounds stone and pounds Template:Para Template:Para and Template:Para Template:Para and Template:Para Template:Para Template:Para (default) Sorting Use Template:Para to include a hidden numerical sortkey in the output, suitable for use in a table with sortable columns. Technically, this places a hidden string before the actual displayed values: {{convert|10|m|ft|sortable=on}} Template:Nowrap showing: . Use both Template:Para and Template:Para together to produce table columns (pipe symbols) for each value in sortable columns: m ft A B C D The generated sortkey is calculated in a consistent way based on both the value and its unit as passed to the convert template. In most cases convert uses the passed value converted to SI base units. It is therefore not necessarily the displayed value or other alternate units and is calculated regardless of output format options. Using different units or different order of units in individual rows should therefore not lead to incorrect sorting, although variations in rounding can give surprising results, since an unrounded number is used for the sortkey. Units The conversion factors and physical constants are sourced here. All units Template:Anchor'per' units: kg/hl, miles per gallon When using a slash (/), a unit like kg/hl is recognized as kilograms per hectolitre and will be converted with other mass/volume units. {{convert|1000|kg/hl}} → Population density (inhabitants per square mile) can be converted using {{convert|10|PD/sqmi|PD/km2}} → Vehicular fuel efficiency, commonly expressed in miles per gallon or litres per 100 km can also be converted {{convert|26|mpgUS|l/100km mpgimp}} → Template:AnchorUnits of difference: Expressing a change or difference in temperature We have already discussed standard temperature conversions (°C, °F, K), as shown in these two examples: {{#invoke:DemoTemplate|convert|10|C}} (standard temperature conversion) {{#invoke:DemoTemplate|convert|10–15|C}} (standard temperature range conversion) When expressing a temperature change (e.g., "The temperature increased by 10 °C"), or when comparing temperatures (e.g., "10 to 15 °C warmer"), we cannot use the standard temperature units (Template:Para, Template:Para and Template:Para), which refer to points on the respective scale. Instead, we must use one of the following "units of difference": Template:Para, Template:Para and Template:Para. Compare the following two examples with the two above: {{#invoke:DemoTemplate|convert|10|C-change}} increase in temperature {{#invoke:DemoTemplate|convert|10–15|C-change}} warmer than normal To produce multiple units in the output: {{#invoke:DemoTemplate|convert|10|C-change|F-change K-change}} difference Multiple units: 1 ft 5 in In input Base document Template:Slink lists options for multiple unit input (like ft,in). It can catch predefined sets only (units that can be subdivided; e.g., yd into ft): {{convert|1|yd|2|ft|3|in}} → {{convert|2|ft|3|in|cm}} → {{convert|1|lb|5|oz|g}} → In output Available multiple-unit output options predefined, like ftin and ydftin. The full list is at Template:Slink. {{convert|2|m|ftin}} → {{convert|2|m|ft in}} → , using a space, returns the decimal point Default behaviour, for comparison: {{convert|2|m}} → See also: Template:Tl a length used to measure horses Template:Tl a weight in ton, cwt, qr and lb Currency per unit: $/mi → $/km Using currency symbols in a $ per unit value, you can convert the per-unit: {{convert|10|$/mi|$/km}} → {{convert|1500|$/ozt|$/g}} → You can set the currency in both values using Template:Para: {{convert|10|$/mi|$/km|$=€}} → It is not possible to convert the currency. So, this result (mixed currencies) is not possible: Template:!mxt Template:Nay Using convert inside templates For usage in template code, like infoboxes, Template:Tlf has these options: Pre-formatting fraction input Module:Convert/helper can read regular input and pre-format it into Template:Tlf-accepted input. Your template can accept Template:Para and use {{#invoke:Convert/helper|number|16 7/8}} → {{#invoke:Convert/helper|number|16 7/8}} Using a Wikidata property Adding the Wikidata property code, like code Template:Para, to your template code automatically returns the Wikidata property for that article, and convert it. Both number and unit are read. Note: to return that property value for an other article, use Template:Para. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) {{convert|input=P2073|qid=Q1056131|ftin|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on|disp=out}} → For example see template:Infobox Telescope. Sometimes a property may have more than one value against it in Wikidata. You can use the Template:Para parameter to specify which of the values you want to use. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) Template:Wikidata entity link: {{convert|input=P2386|qual=Q613628|ft|abbr=on}} → Template:Wikidata entity link: {{convert|input=P2386|qual=Q1395645|ft|abbr=on}} → Parameter list Deprecated options TemplateData <templatedata> { "description": "Converts measurements to other units.", "params": { "1": { "label": "Value", "description": "The value to convert.", "type": "number", "required": true }, "2": { "label": "From unit", "description": "The unit for the provided value.", "type": "string", "example": "km", "required": true }, "3": { "label": "To units", "description": "The units to convert into. Separate units by a space for multiple outputs. In an output unit, use + for a multiplication space.", "type": "string", "example": "mi nmi", "suggested": true }, "4": { "label": "Precision or suffix", "description": "Significant digits after decimal dot or, if negative, exponent of ten.", "type": "number" }, "lk": { "label": "Link units", "description": "Indication of what units to apply wikilinks to. Use “on” for all, “in” for the input unit, “out” for the output units, or “off” for none of the units.", "default": "off", "type": "string", "example": "on" }, "abbr": { "label": "Abbreviation", "description": "Display for the units: “on” to display all units using their unit symbols, “off” to display all units in full words, “in” to display the unit symbol for the input unit, “out” to display the unit symbols for the output units, “unit” to display unit symbols for both input and output units when using scientific notation, “values” for no units at all (neither unit symbols nor full words of units).", "default": "out", "type": "string", "example": "on, unit, in, out, off", "suggested": true }, "sp": { "label": "Spelling", "description": "Spelling of units. Use “us” to display unit names using U.S. spelling.", "type": "string", "example": "us" }, "adj": { "label": "Adjective", "description": "Whether to use adjectival form. Use “on” for singular unit name appended by a hyphen, “mid” to put conversion at end, or “off” (default) for no adjectival form.", "type": "unbalanced-wikitext", "example": "on", "default": "off" }, "disp": { "label": "Conversion", "description": "Display conversion result: “or”: after ‘or’, “x”: with custom prefix and suffix, “b”: in parentheses, “table”/“tablecen”, “output only”: alone, “output number only”: alone and without unit, “unit”: not at all but input unit; if the value is a number it is used as precision.", "type": "string", "example": "b" }, "order": { "label": "Ordering", "description": "“flip” returns converted value first, input value second.", "type": "string", "example": "flip" }, "sigfig": { "label": "Significant figures", "description": "Indicates the number of significant figures to be used in rounding.", "type": "number" }, "round": { "label": "Rounding output", "description": "The type of rounding. “5” rounds the output number to nearest multiple of 5, “25” to nearest multiple of 25, “each” rounds each number in a range.", "type": "number" }, "comma": { "label": "Thousands separator", "description": "Sets or suppresses the use of thousands separators in the numbers. “off”: no separator; “gaps”: use space instead of comma as thousands separator; “5”: only add thousands separator when the integral part of the number uses 5 positions or more (10,000 or more; if using comma as thousands separator, 1234 would produce '1234', 12345 would produce '12,345').", "default": "on", "type": "string", "example": "off" }, "sortable": { "label": "Sort key", "description": "“on” generates a hidden sort key", "type": "string", "example": "on" }, "spell": { "label": "Spell numbers?", "description": "If used, spells input or input and output numbers in words, optionally capitalizing the first", "example": "'in', 'In', 'on', or 'On'", "type": "string" }, "sing": { "type": "string", "deprecated": "use adj=", "label": "Singular?", "description": "If 'yes', uses singular form of units (deprecated)", "example": "yes" }, "frac": { "label": "Fraction?", "description": "fraction as rounding unit", "type": "number" }, "$": { "label": "Currency symbol", "description": "sets currency symbol in both units", "example": "$=€ will show \" €10 per mile (€6.2/km)\"", "type": "string" }, "input": { "label": "WD property", "description": "Reads the property value of the item (article), then converts it", "example": " (P2046=area)", "type": "string" } }, "format": "inline" } </templatedata> See also Template:Temp Template:Temp Template:Temp to convert historical prices to their current equivalent. Template:Convert navs Template:Sandbox other at 2800 rpm
1963-1964	2 × 4-Barrel Carbs	Template:Documentation subpage Template:Hatnote {{#ifeq:Engine|Template:Convert|Template:High-risk}} Template:Transwiki guide Template:Lua Template Template:Tl calculates from one measurement unit to another one, and then presents the results formatted. The complete list of unit symbols recognized by the template is at Module:Convert/documentation/conversion data. For example: {{convert|2|km|mi}} → (km entered, so converted into mile) {{convert|7|mi|km}} → (mi entered, so converted into km) Numbers can be rounded, units can be abbreviated into symbols: {{convert|2|km|mi|2|abbr=on}} → {{convert|7|mi|km|2|abbr=on}} → Value ranges can be entered using |to|... or |-|...: {{convert|2|to|5|km|mi}} → {{convert|2|-|5|km|mi}} → Combined effect example: {{convert|2|-|5|km|mi|2|abbr=on}} → {{convert|2|and|5|km|mi|sigfig=3|abbr=off}} → Units to convert Template:Hatnote Enter units to convert from into: {{convert|1|lb|kg}} → SI units generally accept prefixes, like "m" for milli (10−3), and "M" for mega (106) For "per" units, use "/" (slash): kg/ha For three-unit units, etc., see Template:Cl Unit name or symbol (abbreviation): 1 pound or 1 lb? By default, the first quantity shows the unit name, the second shows the symbol (or abbreviation): {{convert|1|lb|kg}} → Using Template:Para is the reverse behaviour to the default: {{convert|1|lb|kg|abbr=in}} → To abbreviate both or neither: {{convert|1|lb|kg|abbr=on}} → {{convert|1|lb|kg|abbr=off}} → Convenience: Template:Tlf has Template:Para by default Template Template:Tl is the same as Template:Tlf, except that it has Template:Para as the default behaviour. In Template:Tlf, all other options are available. So: {{cvt|1|lb|kg}} → Template:Cvt is equivalent to: {{convert|1|lb|kg|abbr=on}} → Template:Cvt Adjective: a 10-mile distance Use Template:Para to produce the adjectival (hyphenated) form: A {{convert|10|mi|km|adj=on}} distance → A distance. Default behaviour, for comparison: {{convert|10|mi|km}} to go → to go. Template:Para does not produce hyphens with unit symbols, as per Manual of Style: A {{convert|9|in|cm|adj=on|abbr=on}} nail → A nail. Template:AnchorRounding: 100 ft is 30 m or 30.5 m or 30.48 m? Template:Hatnote By definition, 100 ft equals . In practical use, it is common to round the calculated metric number. With that, there are several possibilities. Default rounding By Template:Tlf default, the conversion result will be rounded either to precision comparable to that of the input value (the number of digits after the decimal point—or the negative of the number of non-significant zeroes before the point—is increased by one if the conversion is a multiplication by a number between 0.02 and 0.2, remains the same if the factor is between 0.2 and 2, is decreased by 1 if it is between 2 and 20, and so on) or to two significant digits, whichever is more precise. An exception to this is rounding temperatures (see below). Examples of rounding Input Displays as Note {{convert|123|ft|m|-1}} {{convert|123|ft|m}} same output as with 0 (below) {{convert|123|ft|m|0}} {{convert|123|ft|m|1}} {{convert|123|ft|m|2}} The more-exact value is 37.4904 m or so, which gets converted to 37 m if this parameter is not specified at all. {{convert|500|ft|m|-1}} {{convert|500|ft|m}} same output as with −1 (above), because the conversion factor is between 0.2 and 2 (hence, it should produce same double-zero precision (−2) as in the input value), but the conversion must produce two significant digits at a minimum (hence, a higher single-zero precision (−1) is used) {{convert|500|ft|m|0}} {{convert|500|ft|m|1}} {{convert|500|ft|m|2}} exact value is 152.4 m {{convert|500|ft|cm|-3}} {{convert|500|ft|cm}} same output as with −3 (above), because the conversion factor is between 20 and 200 (hence, it should decrease input value's double-zero precision (−2) by 2), but the conversion must produce two significant digits at a minimum (hence, a higher triple-zero precision (−3) is used) {{convert|500|ft|cm|0}} Convert supports four types of rounding: Round to a given precision: use a precision number Specify the desired precision with the fourth unnamed parameter (or third unnamed parameter if the "convert to" parameter is omitted; or fifth unnamed parameter if a range is specified; or fourth unnamed parameter again if a range is specified and the "convert to" parameter is omitted; needs to be replaced with a "precision" named parameter). The conversion is rounded off to the nearest multiple of Template:Frac to the power of this number. For instance, if the result is 8621 and the round number is "-2", the result will be 8600. If the result is "234.0283043" and the round number is "0", the result will be 234. Round to a given number of significant figures: Template:Para To specify the output number to be with n significant figures use Template:Para: {{convert|1200|ft|m|sigfig=4}} → {{convert|1200|ft|m|sigfig=3}} → {{convert|1200|ft|m|sigfig=2}} → {{convert|1200|ft|m|sigfig=1}} → Default behaviour, for comparison: {{convert|1200|ft|m}} → Setting Template:Para to a value less than 1 is meaningless: {{convert|1200|ft|m|sigfig=0}} → Template:Nay Round to a multiple of 5: 15, 20, 25, ... Using Template:Para rounds the outcome to a multiple of 5. {{convert|10|m|ft}} → {{convert|10|m|ft|round=5}} → Similar: using Template:Para rounds the outcome to a multiple of 25. {{convert|10|m|ft}} → {{convert|10|m|ft|round=25}} → Default behaviour, for comparison: {{convert|10|m|ft|sigfig=4}} → In a range, one can round each value individually to the default. Use Template:Para: {{convert|10 x 200 x 3000|m|ft}} → {{convert|10 x 200 x 3000|m|ft|round=each}} → Round to a multiple of a given fraction: Template:Frac inch Specify the desired denominator using Template:Para. (Denominator is the below-the-slash number, for example the 3 in Template:Frac). {{convert|5.56|cm|in|frac=16}} → {{convert|8|cm|in|frac=4}} → The fraction is reduced when possible: {{convert|8|cm|in|frac=100}} → Default behaviour uses decimal notation: {{convert|5.56|cm|in}} → Template:AnchorRounding temperatures: °C, °F and K In temperatures, the conversion will be rounded either to the precision comparable to that of the input value or to that which would give three significant figures when expressed in kelvins, whichever is more precise. {{#invoke:DemoTemplate|convert|10,000|C|F K}} {{#invoke:DemoTemplate|convert|10,000.1|C|F K}} {{#invoke:DemoTemplate|convert|-272|C|F K}} {{#invoke:DemoTemplate|convert|-272|C}} {{#invoke:DemoTemplate|convert|100|C|F K}} {{#invoke:DemoTemplate|convert|0|C|F K}} The precision of the input number in example (1) is one digit, but the precision of its Kelvins expression is three, so the precision of the Fahrenheit conversion is made three (made 180...) . (1) and (2) seem to belie the fact that a , and make the 32 degrees difference shown in (1) begin to seem off somehow. Result (1) seems off until you set the significant figures yourself with Template:Para: {{#invoke:DemoTemplate|convert|10000|C|sigfig=5}} or you set the precision positionally, relative to the decimal point (zero being at the decimal point): {{#invoke:DemoTemplate|convert|10000|C|0}} The precision of the input number in example (2) is six, so the precision of the Fahrenheit output is, whereas before, Kelvins had determined it to be three. Examples (3) and (4) show how this can be hidden and generate questions, but it occurs there because the Kelvins conversion generated two fractional parts. (Before it was the input number that generated the fractional part.) In example (3) the three input digits converted into five significant output digits because of the two digits after the decimal point, generated by the Kelvins conversion. This happened again in (5), but in (6) decimal fractions were neither given as input nor induced by the Kelvins conversion. Rounding input There is limited support for rounding the displayed input number. The rounding takes place after conversion, so the output is based on the full-precision input. This is useful when the input is produced by Template:Tlc or otherwise available to a higher precision than is usefully displayed, and it's desirable to avoid double-rounding. To round the input to a specified number of digits after the decimal point, use one of the parameters: Template:Para Template:Para Template:Para Template:Para Note that there is no Template:ParaTemplate:Nay or similar for rounding above the decimal place. Neither is there support for significant figures, multiples of 5, or any other output-rounding feature. The default precision is computed based on the input, so an explicit output precision must usually be supplied: Template:Tlc → Template:Nay (precisions are mismatched) Template:Tlc → Template:Aye In this case, if the input were rounded before conversion, a different result would be obtained: Template:Tlc → Template:Nay (double rounding) Into multiple units: Separate the multiple output units by a space: {{convert|10|C|F K}} → {{convert|5|km|mi nmi}} → If the output unit names contain spaces, use + as the separator. See also: For multiple-unit options like 1 ft 5 in, see Template:Section link and Template:Section link. Ranges of values Template:For A range converts two values and separates them by your choice of words and punctuation. A range: 6 to 17 kg (13 to 37 lb) Range indicators are entered as the second parameter (between the values). Range separators can be: Template:Convert/doc/range separator list Multiple dimensions: Use by: {{convert|6|by|12|ft|m}} → Use ×, multiplication sign, or x, letter: {{convert|6|x|12|m|ft}} → In science, the formal way is to set |x| and Template:Para (keeping dimensions right, like in area = x km2): {{convert|6|x|12|m|ft|abbr=on}} → Lists of values: 20, 40, or 60 miles {{convert|20|,|40|, or|60|mi}} → About feet, inch in ranges and multiples While it is possible to enter feet, inch in a simple conversion, this is not possible for ranges: {{convert|1|ft|3|in|x|3|ft|5|in|mm}} → Template:Nay Default behaviour, for comparison: {{convert|1|ft|3|in|mm}} → However, converting metric units into feet and inches with Template:Para can produce the desired output: {{convert|380|x|1040|mm|ftin|order=flip}} → Words Spelling of unit name: international metre or US meter? Default spelling of units is in the en (generic) locale. To show en-US spelling, use Template:Para: {{convert|1|m|ft}} → —default {{convert|1|m|ft|sp=us}} → Spell out numbers: ten miles To write a number in words, use Template:Para: {{convert|10|mi|m|spell=in}} → To spell out both in and out values, use Template:Para: {{convert|10|mi|m|spell=on}} → To make first letter a capital, use Template:Para, Template:Para {{convert|10|mi|m|spell=In}} → {{convert|10|mi|m|spell=On}} → Remember that the spelling of the units (ft, m) is independently set by Template:Para. To the extreme: {{convert|10|mi|m|spell=on|abbr=off|sp=us}} → Inserted before units: 4 planted acres {{convert|4|acre||adj=pre|planted}} → disp=preunit is similar, but has no separator after the specified text, and can have different text for the output value: {{convert|4|acre||disp=preunit|planted }} → {{convert|4|acre||disp=preunit|planted |reforested-}} → After adjective unit: A corridor Note that two units (in this case, ft and m) are required. Use with just one unit will generate an error message. {{convert|10|ft|m|adj=mid|-long}} → Plurals: 1 inch, 2 inches The unit symbol is singular always. Depending on the preceding number only, a unit name can be shown plural. {{convert|1|metre}} → {{convert|2|metre}} → {{convert|2|metre|abbr=on}} → Exception Entering the unit spelled |foot| forces singular output "foot", whatever the number is. {{convert|100|foot|abbr=off}} → Fractions: one-eighth of an imperial pint The convert template also supports spelling out fractions. {{convert|3+1/2|oz|g|spell=in}} → Any additional words needed for the fraction can also be added at the end of the template. {{convert|1/8|imppt|ml|spell=in|adj=pre|of an}} → Wrapping and line breaking See Template:Section link Spelling out "thousands", "millions", etc. Most unit codes accept a prefix of e3 (thousand) or e6 (million) or e9 (billion). {{convert|100|e6mi|e6km}} → {{convert|120|e6acre}} → {{convert|120|e6acre|e3km2}} → To display both input and output in scientific notation, use Template:Para {{convert|100|e6mi|e6km|abbr=on}} → To spell out "thousands", "millions", etc., Template:Para abbreviates the unit; Template:Para displays both full unit names. {{convert|100|e6mi|e6km|abbr=unit}} → {{convert|100|e6mi|e6km|abbr=off}} → Numbers Using an SI prefix: gigametre (Gm), or micrometre (μm) Template:Sidebar metric prefixes (small) Units can have an SI prefix like G before the unit: Gm, and giga before the name: gigametre. These are plain multiplication factors. To illustrate, these are trivial calculations (from metre to metre), showing the multiplication factor: The prefix can be added before the SI unit (here: unit m for metre): {{convert|12|Gm|mi|abbr=on}} → Mm: km: mm: μm: um: (letter "u" can be used for "μ" here) The prefix can be used in the output unit: {{convert|12000|mi|Mm|abbr=on}} → {{convert|12|in|μm|abbr=on}} → As an exception, the non-SI unit "inch" can have the "μ" prefix too: {{convert|12|μm|μin|abbr=on}} → Engineering notation: 7 × 106 m In the unit: e6m Engineering notation can be entered as a "prefix" to the unit: {{convert|70|e6m}} → The same is possible for the output unit: {{convert|23,000,000|ft|e6m}} → Any standard unit (not a combination, multiple, or built-in unit) can have such a prefix: e3 (thousand), e6 (million), e9 (billion), e12 (trillion), e15 (quadrillion). Scientific notation: 1.23 × 10−14 In scientific notation, a number is written like Template:Rnd. The plain number has exactly one digit before the decimal point. With Template:Tlf, the input can be in e-notation such as 12.3e4. This value is displayed as a power of ten, and the output is displayed in scientific notation, except that an output value satisfying 0.01 <= v < 1000 is shown as a normal number. In addition, if the output value is 1000 and sigfig=4 is used, the value is displayed as a normal number. {{convert|12.3e-15|atm|atm|abbr=on}} → {{convert|0.00000005|atm|atm|abbr=on}} → Input with fractions: The number to convert can be written in fractions. Both / (keyboard slash) and ⁄ (fraction slash) are accepted: {{convert|1/2|in|mm|1}} → {{convert|1⁄2|in|mm|1}} → With positive mixed numbers (a positive integer and a fraction), use a + sign {{convert|2+1⁄2|in|mm|1}} → With negative mixed numbers, use a hyphen - and repeat it: {{convert|-2-1⁄2|in|mm|1}} → Note that the following cases are not interpreted as mixed numbers: {{convert|2-1⁄2|in|mm|1}} → . This is interpreted as a range from 2 inches to 1⁄2 inch. {{convert|-2+1⁄2|in|mm|1}} → Template:Nay This is neither a mixed number nor a range, and mathematical expressions requiring calculations are not allowed here. Horizontal fraction bar: Template:Sfrac inch Using a double slash (//) provides a horizontal fraction bar for the original (input) unit: {{convert|1//2|in|mm|1}} → {{convert|6+3//8|in|mm|1}} → Using a negative value for Template:Para provides a horizontal fraction bar for the converted (output) unit: {{convert|12.7|mm|frac=-2}} → {{convert|161.9|mm|frac=-8}} → Thousands separator: 1,000 mi or 1000 mi In input, a comma for thousands separator is accepted but not required; a gap (space) is not accepted. In output, by default, the thousand separator is the comma: {{convert|1234567|m|ft}} → {{convert|1,234,567|m|ft}} → Set Template:Para to remove the separator from the output: {{convert|1234567|m|ft|comma=off}} → Use Template:Para to use digit grouping by gap (thin space) as a thousands separator: {{convert|1234567|m|ft|comma=gaps}} → Default behaviour, for comparison: {{convert|1234567|m|ft}} → Setting Template:Para will only add the separator when the number of digits is 5 or more: {{convert|1234|m|ft|comma=5}} → {{convert|1234567|m|ft|comma=5}} → Default behaviour, for comparison: {{convert|1234|m|ft}} → Output manipulation Brackets and separators: 10 m [33 ft] Punctuation that distinguishes the two measurements is set by Template:Para. Options are: b (the default), sqbr, comma, or, br, x|…: {{convert|10|m|ft|disp=sqbr}} → {{convert|10|m|ft|disp=comma}} → {{convert|10|m|ft|disp=or}} → Default behaviour, for comparison: {{convert|10|m|ft}} → Setting Template:Para will force a new line (<br/>) {{convert|10|m|ft|disp=br}} → Also Template:Para will force a new line, and keep the brackets (useful in tables): {{convert|10|m|ft|disp=br()}} → Setting Template:Para allows any text as separator: {{convert|10|m|ft|disp=x|_MyText_}} → (To display spaces, use &nbsp;) Flipping (reordering) the two measurements: Setting Template:Para will flip (swap) the two measurements: {{convert|1|mi|m|order=flip}} → Default behaviour, for comparison: {{convert|1|mi|m}} → When converting to multiple units, the effect is: {{convert|10|km|mi nmi|order=flip}} → {{convert|10|km|nmi mi|order=flip}} → Fixed ordering of output units: Setting Template:Para shows the output-units as ordered; the input unit is skipped: {{convert|100|C|F C K|abbr=on|order=out}} → {{convert|200|PS|kW hp|0|abbr=on|order=out}} → See also: § Displaying parts of the output. Displaying parts of the result: It is possible to display only parts of the conversion result: Convert Output Returns {{convert|2|cuyd|m3}} Regular output (for comparison) {{convert|2|cuyd|m3|abbr=values}} Input and output numbers {{convert|2|cuyd|m3|disp=unit}} Input unit {{convert|2|cuyd|m3|disp=unit|adj=on}} Input unit, adjective (hyphenated) {{convert|2|cuyd|cuyd|disp=out}} Input (workaround. Template:Nowrap) {{convert|2|cuyd|m3|abbr=~}} Input: both name and symbol {{convert|2|cuyd|m3|disp=unit2}} Output unit (symbol) {{convert|2|cuyd|m3|disp=unit2|abbr=off}} Output unit (name) {{convert|2|cuyd|m3|disp=number}} Output value {{convert|2|cuyd|m3|disp=out}} Output value and unit name {{convert|2|cuyd|m3|disp=out|abbr=off}} Output value and unit symbol Display both input name and symbol: 2 kilopascals [kPa] Setting Template:Para returns both name and symbol of the first (input) unit: {{convert|2|kPa|psi|abbr=~}} → A {{convert|2|kPa|psi|abbr=~|adj=on}} pressure → Template:Nowrap Table options For the wikitable structure, there are three options: add a line-break, split the result over columns and make the table sortable. Enforced line break Template:Para adds a line-break and omits brackets. Template:Para adds a line-break and does add brackets to the converted value. This may be useful in tables: Template:Para Template:Para Table columns Using {convert} in a table cell, with Template:Para splits the result over two (or more) columns. By default units are not included in the table, however, they can be added using the Template:Para parameter. Multiple-unit outputs, like ftin, always output their units to the table. {{convert|10|m|ft|disp=table}} → Template:Para does the same, and also centers the text: {{convert|20|m|ft|disp=tablecen}} → The units are added as a column header:   kilograms pounds stone and pounds Template:Para Template:Para and Template:Para Template:Para and Template:Para Template:Para Template:Para (default) Sorting Use Template:Para to include a hidden numerical sortkey in the output, suitable for use in a table with sortable columns. Technically, this places a hidden string before the actual displayed values: {{convert|10|m|ft|sortable=on}} Template:Nowrap showing: . Use both Template:Para and Template:Para together to produce table columns (pipe symbols) for each value in sortable columns: m ft A B C D The generated sortkey is calculated in a consistent way based on both the value and its unit as passed to the convert template. In most cases convert uses the passed value converted to SI base units. It is therefore not necessarily the displayed value or other alternate units and is calculated regardless of output format options. Using different units or different order of units in individual rows should therefore not lead to incorrect sorting, although variations in rounding can give surprising results, since an unrounded number is used for the sortkey. Units The conversion factors and physical constants are sourced here. All units Template:Anchor'per' units: kg/hl, miles per gallon When using a slash (/), a unit like kg/hl is recognized as kilograms per hectolitre and will be converted with other mass/volume units. {{convert|1000|kg/hl}} → Population density (inhabitants per square mile) can be converted using {{convert|10|PD/sqmi|PD/km2}} → Vehicular fuel efficiency, commonly expressed in miles per gallon or litres per 100 km can also be converted {{convert|26|mpgUS|l/100km mpgimp}} → Template:AnchorUnits of difference: Expressing a change or difference in temperature We have already discussed standard temperature conversions (°C, °F, K), as shown in these two examples: {{#invoke:DemoTemplate|convert|10|C}} (standard temperature conversion) {{#invoke:DemoTemplate|convert|10–15|C}} (standard temperature range conversion) When expressing a temperature change (e.g., "The temperature increased by 10 °C"), or when comparing temperatures (e.g., "10 to 15 °C warmer"), we cannot use the standard temperature units (Template:Para, Template:Para and Template:Para), which refer to points on the respective scale. Instead, we must use one of the following "units of difference": Template:Para, Template:Para and Template:Para. Compare the following two examples with the two above: {{#invoke:DemoTemplate|convert|10|C-change}} increase in temperature {{#invoke:DemoTemplate|convert|10–15|C-change}} warmer than normal To produce multiple units in the output: {{#invoke:DemoTemplate|convert|10|C-change|F-change K-change}} difference Multiple units: 1 ft 5 in In input Base document Template:Slink lists options for multiple unit input (like ft,in). It can catch predefined sets only (units that can be subdivided; e.g., yd into ft): {{convert|1|yd|2|ft|3|in}} → {{convert|2|ft|3|in|cm}} → {{convert|1|lb|5|oz|g}} → In output Available multiple-unit output options predefined, like ftin and ydftin. The full list is at Template:Slink. {{convert|2|m|ftin}} → {{convert|2|m|ft in}} → , using a space, returns the decimal point Default behaviour, for comparison: {{convert|2|m}} → See also: Template:Tl a length used to measure horses Template:Tl a weight in ton, cwt, qr and lb Currency per unit: $/mi → $/km Using currency symbols in a $ per unit value, you can convert the per-unit: {{convert|10|$/mi|$/km}} → {{convert|1500|$/ozt|$/g}} → You can set the currency in both values using Template:Para: {{convert|10|$/mi|$/km|$=€}} → It is not possible to convert the currency. So, this result (mixed currencies) is not possible: Template:!mxt Template:Nay Using convert inside templates For usage in template code, like infoboxes, Template:Tlf has these options: Pre-formatting fraction input Module:Convert/helper can read regular input and pre-format it into Template:Tlf-accepted input. Your template can accept Template:Para and use {{#invoke:Convert/helper|number|16 7/8}} → {{#invoke:Convert/helper|number|16 7/8}} Using a Wikidata property Adding the Wikidata property code, like code Template:Para, to your template code automatically returns the Wikidata property for that article, and convert it. Both number and unit are read. Note: to return that property value for an other article, use Template:Para. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) {{convert|input=P2073|qid=Q1056131|ftin|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on|disp=out}} → For example see template:Infobox Telescope. Sometimes a property may have more than one value against it in Wikidata. You can use the Template:Para parameter to specify which of the values you want to use. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) Template:Wikidata entity link: {{convert|input=P2386|qual=Q613628|ft|abbr=on}} → Template:Wikidata entity link: {{convert|input=P2386|qual=Q1395645|ft|abbr=on}} → Parameter list Deprecated options TemplateData <templatedata> { "description": "Converts measurements to other units.", "params": { "1": { "label": "Value", "description": "The value to convert.", "type": "number", "required": true }, "2": { "label": "From unit", "description": "The unit for the provided value.", "type": "string", "example": "km", "required": true }, "3": { "label": "To units", "description": "The units to convert into. Separate units by a space for multiple outputs. In an output unit, use + for a multiplication space.", "type": "string", "example": "mi nmi", "suggested": true }, "4": { "label": "Precision or suffix", "description": "Significant digits after decimal dot or, if negative, exponent of ten.", "type": "number" }, "lk": { "label": "Link units", "description": "Indication of what units to apply wikilinks to. Use “on” for all, “in” for the input unit, “out” for the output units, or “off” for none of the units.", "default": "off", "type": "string", "example": "on" }, "abbr": { "label": "Abbreviation", "description": "Display for the units: “on” to display all units using their unit symbols, “off” to display all units in full words, “in” to display the unit symbol for the input unit, “out” to display the unit symbols for the output units, “unit” to display unit symbols for both input and output units when using scientific notation, “values” for no units at all (neither unit symbols nor full words of units).", "default": "out", "type": "string", "example": "on, unit, in, out, off", "suggested": true }, "sp": { "label": "Spelling", "description": "Spelling of units. Use “us” to display unit names using U.S. spelling.", "type": "string", "example": "us" }, "adj": { "label": "Adjective", "description": "Whether to use adjectival form. Use “on” for singular unit name appended by a hyphen, “mid” to put conversion at end, or “off” (default) for no adjectival form.", "type": "unbalanced-wikitext", "example": "on", "default": "off" }, "disp": { "label": "Conversion", "description": "Display conversion result: “or”: after ‘or’, “x”: with custom prefix and suffix, “b”: in parentheses, “table”/“tablecen”, “output only”: alone, “output number only”: alone and without unit, “unit”: not at all but input unit; if the value is a number it is used as precision.", "type": "string", "example": "b" }, "order": { "label": "Ordering", "description": "“flip” returns converted value first, input value second.", "type": "string", "example": "flip" }, "sigfig": { "label": "Significant figures", "description": "Indicates the number of significant figures to be used in rounding.", "type": "number" }, "round": { "label": "Rounding output", "description": "The type of rounding. “5” rounds the output number to nearest multiple of 5, “25” to nearest multiple of 25, “each” rounds each number in a range.", "type": "number" }, "comma": { "label": "Thousands separator", "description": "Sets or suppresses the use of thousands separators in the numbers. “off”: no separator; “gaps”: use space instead of comma as thousands separator; “5”: only add thousands separator when the integral part of the number uses 5 positions or more (10,000 or more; if using comma as thousands separator, 1234 would produce '1234', 12345 would produce '12,345').", "default": "on", "type": "string", "example": "off" }, "sortable": { "label": "Sort key", "description": "“on” generates a hidden sort key", "type": "string", "example": "on" }, "spell": { "label": "Spell numbers?", "description": "If used, spells input or input and output numbers in words, optionally capitalizing the first", "example": "'in', 'In', 'on', or 'On'", "type": "string" }, "sing": { "type": "string", "deprecated": "use adj=", "label": "Singular?", "description": "If 'yes', uses singular form of units (deprecated)", "example": "yes" }, "frac": { "label": "Fraction?", "description": "fraction as rounding unit", "type": "number" }, "$": { "label": "Currency symbol", "description": "sets currency symbol in both units", "example": "$=€ will show \" €10 per mile (€6.2/km)\"", "type": "string" }, "input": { "label": "WD property", "description": "Reads the property value of the item (article), then converts it", "example": " (P2046=area)", "type": "string" } }, "format": "inline" } </templatedata> See also Template:Temp Template:Temp Template:Temp to convert historical prices to their current equivalent. Template:Convert navs Template:Sandbox other at 4800 rpm	Template:Documentation subpage Template:Hatnote {{#ifeq:Engine|Template:Convert|Template:High-risk}} Template:Transwiki guide Template:Lua Template Template:Tl calculates from one measurement unit to another one, and then presents the results formatted. The complete list of unit symbols recognized by the template is at Module:Convert/documentation/conversion data. For example: {{convert|2|km|mi}} → (km entered, so converted into mile) {{convert|7|mi|km}} → (mi entered, so converted into km) Numbers can be rounded, units can be abbreviated into symbols: {{convert|2|km|mi|2|abbr=on}} → {{convert|7|mi|km|2|abbr=on}} → Value ranges can be entered using |to|... or |-|...: {{convert|2|to|5|km|mi}} → {{convert|2|-|5|km|mi}} → Combined effect example: {{convert|2|-|5|km|mi|2|abbr=on}} → {{convert|2|and|5|km|mi|sigfig=3|abbr=off}} → Units to convert Template:Hatnote Enter units to convert from into: {{convert|1|lb|kg}} → SI units generally accept prefixes, like "m" for milli (10−3), and "M" for mega (106) For "per" units, use "/" (slash): kg/ha For three-unit units, etc., see Template:Cl Unit name or symbol (abbreviation): 1 pound or 1 lb? By default, the first quantity shows the unit name, the second shows the symbol (or abbreviation): {{convert|1|lb|kg}} → Using Template:Para is the reverse behaviour to the default: {{convert|1|lb|kg|abbr=in}} → To abbreviate both or neither: {{convert|1|lb|kg|abbr=on}} → {{convert|1|lb|kg|abbr=off}} → Convenience: Template:Tlf has Template:Para by default Template Template:Tl is the same as Template:Tlf, except that it has Template:Para as the default behaviour. In Template:Tlf, all other options are available. So: {{cvt|1|lb|kg}} → Template:Cvt is equivalent to: {{convert|1|lb|kg|abbr=on}} → Template:Cvt Adjective: a 10-mile distance Use Template:Para to produce the adjectival (hyphenated) form: A {{convert|10|mi|km|adj=on}} distance → A distance. Default behaviour, for comparison: {{convert|10|mi|km}} to go → to go. Template:Para does not produce hyphens with unit symbols, as per Manual of Style: A {{convert|9|in|cm|adj=on|abbr=on}} nail → A nail. Template:AnchorRounding: 100 ft is 30 m or 30.5 m or 30.48 m? Template:Hatnote By definition, 100 ft equals . In practical use, it is common to round the calculated metric number. With that, there are several possibilities. Default rounding By Template:Tlf default, the conversion result will be rounded either to precision comparable to that of the input value (the number of digits after the decimal point—or the negative of the number of non-significant zeroes before the point—is increased by one if the conversion is a multiplication by a number between 0.02 and 0.2, remains the same if the factor is between 0.2 and 2, is decreased by 1 if it is between 2 and 20, and so on) or to two significant digits, whichever is more precise. An exception to this is rounding temperatures (see below). Examples of rounding Input Displays as Note {{convert|123|ft|m|-1}} {{convert|123|ft|m}} same output as with 0 (below) {{convert|123|ft|m|0}} {{convert|123|ft|m|1}} {{convert|123|ft|m|2}} The more-exact value is 37.4904 m or so, which gets converted to 37 m if this parameter is not specified at all. {{convert|500|ft|m|-1}} {{convert|500|ft|m}} same output as with −1 (above), because the conversion factor is between 0.2 and 2 (hence, it should produce same double-zero precision (−2) as in the input value), but the conversion must produce two significant digits at a minimum (hence, a higher single-zero precision (−1) is used) {{convert|500|ft|m|0}} {{convert|500|ft|m|1}} {{convert|500|ft|m|2}} exact value is 152.4 m {{convert|500|ft|cm|-3}} {{convert|500|ft|cm}} same output as with −3 (above), because the conversion factor is between 20 and 200 (hence, it should decrease input value's double-zero precision (−2) by 2), but the conversion must produce two significant digits at a minimum (hence, a higher triple-zero precision (−3) is used) {{convert|500|ft|cm|0}} Convert supports four types of rounding: Round to a given precision: use a precision number Specify the desired precision with the fourth unnamed parameter (or third unnamed parameter if the "convert to" parameter is omitted; or fifth unnamed parameter if a range is specified; or fourth unnamed parameter again if a range is specified and the "convert to" parameter is omitted; needs to be replaced with a "precision" named parameter). The conversion is rounded off to the nearest multiple of Template:Frac to the power of this number. For instance, if the result is 8621 and the round number is "-2", the result will be 8600. If the result is "234.0283043" and the round number is "0", the result will be 234. Round to a given number of significant figures: Template:Para To specify the output number to be with n significant figures use Template:Para: {{convert|1200|ft|m|sigfig=4}} → {{convert|1200|ft|m|sigfig=3}} → {{convert|1200|ft|m|sigfig=2}} → {{convert|1200|ft|m|sigfig=1}} → Default behaviour, for comparison: {{convert|1200|ft|m}} → Setting Template:Para to a value less than 1 is meaningless: {{convert|1200|ft|m|sigfig=0}} → Template:Nay Round to a multiple of 5: 15, 20, 25, ... Using Template:Para rounds the outcome to a multiple of 5. {{convert|10|m|ft}} → {{convert|10|m|ft|round=5}} → Similar: using Template:Para rounds the outcome to a multiple of 25. {{convert|10|m|ft}} → {{convert|10|m|ft|round=25}} → Default behaviour, for comparison: {{convert|10|m|ft|sigfig=4}} → In a range, one can round each value individually to the default. Use Template:Para: {{convert|10 x 200 x 3000|m|ft}} → {{convert|10 x 200 x 3000|m|ft|round=each}} → Round to a multiple of a given fraction: Template:Frac inch Specify the desired denominator using Template:Para. (Denominator is the below-the-slash number, for example the 3 in Template:Frac). {{convert|5.56|cm|in|frac=16}} → {{convert|8|cm|in|frac=4}} → The fraction is reduced when possible: {{convert|8|cm|in|frac=100}} → Default behaviour uses decimal notation: {{convert|5.56|cm|in}} → Template:AnchorRounding temperatures: °C, °F and K In temperatures, the conversion will be rounded either to the precision comparable to that of the input value or to that which would give three significant figures when expressed in kelvins, whichever is more precise. {{#invoke:DemoTemplate|convert|10,000|C|F K}} {{#invoke:DemoTemplate|convert|10,000.1|C|F K}} {{#invoke:DemoTemplate|convert|-272|C|F K}} {{#invoke:DemoTemplate|convert|-272|C}} {{#invoke:DemoTemplate|convert|100|C|F K}} {{#invoke:DemoTemplate|convert|0|C|F K}} The precision of the input number in example (1) is one digit, but the precision of its Kelvins expression is three, so the precision of the Fahrenheit conversion is made three (made 180...) . (1) and (2) seem to belie the fact that a , and make the 32 degrees difference shown in (1) begin to seem off somehow. Result (1) seems off until you set the significant figures yourself with Template:Para: {{#invoke:DemoTemplate|convert|10000|C|sigfig=5}} or you set the precision positionally, relative to the decimal point (zero being at the decimal point): {{#invoke:DemoTemplate|convert|10000|C|0}} The precision of the input number in example (2) is six, so the precision of the Fahrenheit output is, whereas before, Kelvins had determined it to be three. Examples (3) and (4) show how this can be hidden and generate questions, but it occurs there because the Kelvins conversion generated two fractional parts. (Before it was the input number that generated the fractional part.) In example (3) the three input digits converted into five significant output digits because of the two digits after the decimal point, generated by the Kelvins conversion. This happened again in (5), but in (6) decimal fractions were neither given as input nor induced by the Kelvins conversion. Rounding input There is limited support for rounding the displayed input number. The rounding takes place after conversion, so the output is based on the full-precision input. This is useful when the input is produced by Template:Tlc or otherwise available to a higher precision than is usefully displayed, and it's desirable to avoid double-rounding. To round the input to a specified number of digits after the decimal point, use one of the parameters: Template:Para Template:Para Template:Para Template:Para Note that there is no Template:ParaTemplate:Nay or similar for rounding above the decimal place. Neither is there support for significant figures, multiples of 5, or any other output-rounding feature. The default precision is computed based on the input, so an explicit output precision must usually be supplied: Template:Tlc → Template:Nay (precisions are mismatched) Template:Tlc → Template:Aye In this case, if the input were rounded before conversion, a different result would be obtained: Template:Tlc → Template:Nay (double rounding) Into multiple units: Separate the multiple output units by a space: {{convert|10|C|F K}} → {{convert|5|km|mi nmi}} → If the output unit names contain spaces, use + as the separator. See also: For multiple-unit options like 1 ft 5 in, see Template:Section link and Template:Section link. Ranges of values Template:For A range converts two values and separates them by your choice of words and punctuation. A range: 6 to 17 kg (13 to 37 lb) Range indicators are entered as the second parameter (between the values). Range separators can be: Template:Convert/doc/range separator list Multiple dimensions: Use by: {{convert|6|by|12|ft|m}} → Use ×, multiplication sign, or x, letter: {{convert|6|x|12|m|ft}} → In science, the formal way is to set |x| and Template:Para (keeping dimensions right, like in area = x km2): {{convert|6|x|12|m|ft|abbr=on}} → Lists of values: 20, 40, or 60 miles {{convert|20|,|40|, or|60|mi}} → About feet, inch in ranges and multiples While it is possible to enter feet, inch in a simple conversion, this is not possible for ranges: {{convert|1|ft|3|in|x|3|ft|5|in|mm}} → Template:Nay Default behaviour, for comparison: {{convert|1|ft|3|in|mm}} → However, converting metric units into feet and inches with Template:Para can produce the desired output: {{convert|380|x|1040|mm|ftin|order=flip}} → Words Spelling of unit name: international metre or US meter? Default spelling of units is in the en (generic) locale. To show en-US spelling, use Template:Para: {{convert|1|m|ft}} → —default {{convert|1|m|ft|sp=us}} → Spell out numbers: ten miles To write a number in words, use Template:Para: {{convert|10|mi|m|spell=in}} → To spell out both in and out values, use Template:Para: {{convert|10|mi|m|spell=on}} → To make first letter a capital, use Template:Para, Template:Para {{convert|10|mi|m|spell=In}} → {{convert|10|mi|m|spell=On}} → Remember that the spelling of the units (ft, m) is independently set by Template:Para. To the extreme: {{convert|10|mi|m|spell=on|abbr=off|sp=us}} → Inserted before units: 4 planted acres {{convert|4|acre||adj=pre|planted}} → disp=preunit is similar, but has no separator after the specified text, and can have different text for the output value: {{convert|4|acre||disp=preunit|planted }} → {{convert|4|acre||disp=preunit|planted |reforested-}} → After adjective unit: A corridor Note that two units (in this case, ft and m) are required. Use with just one unit will generate an error message. {{convert|10|ft|m|adj=mid|-long}} → Plurals: 1 inch, 2 inches The unit symbol is singular always. Depending on the preceding number only, a unit name can be shown plural. {{convert|1|metre}} → {{convert|2|metre}} → {{convert|2|metre|abbr=on}} → Exception Entering the unit spelled |foot| forces singular output "foot", whatever the number is. {{convert|100|foot|abbr=off}} → Fractions: one-eighth of an imperial pint The convert template also supports spelling out fractions. {{convert|3+1/2|oz|g|spell=in}} → Any additional words needed for the fraction can also be added at the end of the template. {{convert|1/8|imppt|ml|spell=in|adj=pre|of an}} → Wrapping and line breaking See Template:Section link Spelling out "thousands", "millions", etc. Most unit codes accept a prefix of e3 (thousand) or e6 (million) or e9 (billion). {{convert|100|e6mi|e6km}} → {{convert|120|e6acre}} → {{convert|120|e6acre|e3km2}} → To display both input and output in scientific notation, use Template:Para {{convert|100|e6mi|e6km|abbr=on}} → To spell out "thousands", "millions", etc., Template:Para abbreviates the unit; Template:Para displays both full unit names. {{convert|100|e6mi|e6km|abbr=unit}} → {{convert|100|e6mi|e6km|abbr=off}} → Numbers Using an SI prefix: gigametre (Gm), or micrometre (μm) Template:Sidebar metric prefixes (small) Units can have an SI prefix like G before the unit: Gm, and giga before the name: gigametre. These are plain multiplication factors. To illustrate, these are trivial calculations (from metre to metre), showing the multiplication factor: The prefix can be added before the SI unit (here: unit m for metre): {{convert|12|Gm|mi|abbr=on}} → Mm: km: mm: μm: um: (letter "u" can be used for "μ" here) The prefix can be used in the output unit: {{convert|12000|mi|Mm|abbr=on}} → {{convert|12|in|μm|abbr=on}} → As an exception, the non-SI unit "inch" can have the "μ" prefix too: {{convert|12|μm|μin|abbr=on}} → Engineering notation: 7 × 106 m In the unit: e6m Engineering notation can be entered as a "prefix" to the unit: {{convert|70|e6m}} → The same is possible for the output unit: {{convert|23,000,000|ft|e6m}} → Any standard unit (not a combination, multiple, or built-in unit) can have such a prefix: e3 (thousand), e6 (million), e9 (billion), e12 (trillion), e15 (quadrillion). Scientific notation: 1.23 × 10−14 In scientific notation, a number is written like Template:Rnd. The plain number has exactly one digit before the decimal point. With Template:Tlf, the input can be in e-notation such as 12.3e4. This value is displayed as a power of ten, and the output is displayed in scientific notation, except that an output value satisfying 0.01 <= v < 1000 is shown as a normal number. In addition, if the output value is 1000 and sigfig=4 is used, the value is displayed as a normal number. {{convert|12.3e-15|atm|atm|abbr=on}} → {{convert|0.00000005|atm|atm|abbr=on}} → Input with fractions: The number to convert can be written in fractions. Both / (keyboard slash) and ⁄ (fraction slash) are accepted: {{convert|1/2|in|mm|1}} → {{convert|1⁄2|in|mm|1}} → With positive mixed numbers (a positive integer and a fraction), use a + sign {{convert|2+1⁄2|in|mm|1}} → With negative mixed numbers, use a hyphen - and repeat it: {{convert|-2-1⁄2|in|mm|1}} → Note that the following cases are not interpreted as mixed numbers: {{convert|2-1⁄2|in|mm|1}} → . This is interpreted as a range from 2 inches to 1⁄2 inch. {{convert|-2+1⁄2|in|mm|1}} → Template:Nay This is neither a mixed number nor a range, and mathematical expressions requiring calculations are not allowed here. Horizontal fraction bar: Template:Sfrac inch Using a double slash (//) provides a horizontal fraction bar for the original (input) unit: {{convert|1//2|in|mm|1}} → {{convert|6+3//8|in|mm|1}} → Using a negative value for Template:Para provides a horizontal fraction bar for the converted (output) unit: {{convert|12.7|mm|frac=-2}} → {{convert|161.9|mm|frac=-8}} → Thousands separator: 1,000 mi or 1000 mi In input, a comma for thousands separator is accepted but not required; a gap (space) is not accepted. In output, by default, the thousand separator is the comma: {{convert|1234567|m|ft}} → {{convert|1,234,567|m|ft}} → Set Template:Para to remove the separator from the output: {{convert|1234567|m|ft|comma=off}} → Use Template:Para to use digit grouping by gap (thin space) as a thousands separator: {{convert|1234567|m|ft|comma=gaps}} → Default behaviour, for comparison: {{convert|1234567|m|ft}} → Setting Template:Para will only add the separator when the number of digits is 5 or more: {{convert|1234|m|ft|comma=5}} → {{convert|1234567|m|ft|comma=5}} → Default behaviour, for comparison: {{convert|1234|m|ft}} → Output manipulation Brackets and separators: 10 m [33 ft] Punctuation that distinguishes the two measurements is set by Template:Para. Options are: b (the default), sqbr, comma, or, br, x|…: {{convert|10|m|ft|disp=sqbr}} → {{convert|10|m|ft|disp=comma}} → {{convert|10|m|ft|disp=or}} → Default behaviour, for comparison: {{convert|10|m|ft}} → Setting Template:Para will force a new line (<br/>) {{convert|10|m|ft|disp=br}} → Also Template:Para will force a new line, and keep the brackets (useful in tables): {{convert|10|m|ft|disp=br()}} → Setting Template:Para allows any text as separator: {{convert|10|m|ft|disp=x|_MyText_}} → (To display spaces, use &nbsp;) Flipping (reordering) the two measurements: Setting Template:Para will flip (swap) the two measurements: {{convert|1|mi|m|order=flip}} → Default behaviour, for comparison: {{convert|1|mi|m}} → When converting to multiple units, the effect is: {{convert|10|km|mi nmi|order=flip}} → {{convert|10|km|nmi mi|order=flip}} → Fixed ordering of output units: Setting Template:Para shows the output-units as ordered; the input unit is skipped: {{convert|100|C|F C K|abbr=on|order=out}} → {{convert|200|PS|kW hp|0|abbr=on|order=out}} → See also: § Displaying parts of the output. Displaying parts of the result: It is possible to display only parts of the conversion result: Convert Output Returns {{convert|2|cuyd|m3}} Regular output (for comparison) {{convert|2|cuyd|m3|abbr=values}} Input and output numbers {{convert|2|cuyd|m3|disp=unit}} Input unit {{convert|2|cuyd|m3|disp=unit|adj=on}} Input unit, adjective (hyphenated) {{convert|2|cuyd|cuyd|disp=out}} Input (workaround. Template:Nowrap) {{convert|2|cuyd|m3|abbr=~}} Input: both name and symbol {{convert|2|cuyd|m3|disp=unit2}} Output unit (symbol) {{convert|2|cuyd|m3|disp=unit2|abbr=off}} Output unit (name) {{convert|2|cuyd|m3|disp=number}} Output value {{convert|2|cuyd|m3|disp=out}} Output value and unit name {{convert|2|cuyd|m3|disp=out|abbr=off}} Output value and unit symbol Display both input name and symbol: 2 kilopascals [kPa] Setting Template:Para returns both name and symbol of the first (input) unit: {{convert|2|kPa|psi|abbr=~}} → A {{convert|2|kPa|psi|abbr=~|adj=on}} pressure → Template:Nowrap Table options For the wikitable structure, there are three options: add a line-break, split the result over columns and make the table sortable. Enforced line break Template:Para adds a line-break and omits brackets. Template:Para adds a line-break and does add brackets to the converted value. This may be useful in tables: Template:Para Template:Para Table columns Using {convert} in a table cell, with Template:Para splits the result over two (or more) columns. By default units are not included in the table, however, they can be added using the Template:Para parameter. Multiple-unit outputs, like ftin, always output their units to the table. {{convert|10|m|ft|disp=table}} → Template:Para does the same, and also centers the text: {{convert|20|m|ft|disp=tablecen}} → The units are added as a column header:   kilograms pounds stone and pounds Template:Para Template:Para and Template:Para Template:Para and Template:Para Template:Para Template:Para (default) Sorting Use Template:Para to include a hidden numerical sortkey in the output, suitable for use in a table with sortable columns. Technically, this places a hidden string before the actual displayed values: {{convert|10|m|ft|sortable=on}} Template:Nowrap showing: . Use both Template:Para and Template:Para together to produce table columns (pipe symbols) for each value in sortable columns: m ft A B C D The generated sortkey is calculated in a consistent way based on both the value and its unit as passed to the convert template. In most cases convert uses the passed value converted to SI base units. It is therefore not necessarily the displayed value or other alternate units and is calculated regardless of output format options. Using different units or different order of units in individual rows should therefore not lead to incorrect sorting, although variations in rounding can give surprising results, since an unrounded number is used for the sortkey. Units The conversion factors and physical constants are sourced here. All units Template:Anchor'per' units: kg/hl, miles per gallon When using a slash (/), a unit like kg/hl is recognized as kilograms per hectolitre and will be converted with other mass/volume units. {{convert|1000|kg/hl}} → Population density (inhabitants per square mile) can be converted using {{convert|10|PD/sqmi|PD/km2}} → Vehicular fuel efficiency, commonly expressed in miles per gallon or litres per 100 km can also be converted {{convert|26|mpgUS|l/100km mpgimp}} → Template:AnchorUnits of difference: Expressing a change or difference in temperature We have already discussed standard temperature conversions (°C, °F, K), as shown in these two examples: {{#invoke:DemoTemplate|convert|10|C}} (standard temperature conversion) {{#invoke:DemoTemplate|convert|10–15|C}} (standard temperature range conversion) When expressing a temperature change (e.g., "The temperature increased by 10 °C"), or when comparing temperatures (e.g., "10 to 15 °C warmer"), we cannot use the standard temperature units (Template:Para, Template:Para and Template:Para), which refer to points on the respective scale. Instead, we must use one of the following "units of difference": Template:Para, Template:Para and Template:Para. Compare the following two examples with the two above: {{#invoke:DemoTemplate|convert|10|C-change}} increase in temperature {{#invoke:DemoTemplate|convert|10–15|C-change}} warmer than normal To produce multiple units in the output: {{#invoke:DemoTemplate|convert|10|C-change|F-change K-change}} difference Multiple units: 1 ft 5 in In input Base document Template:Slink lists options for multiple unit input (like ft,in). It can catch predefined sets only (units that can be subdivided; e.g., yd into ft): {{convert|1|yd|2|ft|3|in}} → {{convert|2|ft|3|in|cm}} → {{convert|1|lb|5|oz|g}} → In output Available multiple-unit output options predefined, like ftin and ydftin. The full list is at Template:Slink. {{convert|2|m|ftin}} → {{convert|2|m|ft in}} → , using a space, returns the decimal point Default behaviour, for comparison: {{convert|2|m}} → See also: Template:Tl a length used to measure horses Template:Tl a weight in ton, cwt, qr and lb Currency per unit: $/mi → $/km Using currency symbols in a $ per unit value, you can convert the per-unit: {{convert|10|$/mi|$/km}} → {{convert|1500|$/ozt|$/g}} → You can set the currency in both values using Template:Para: {{convert|10|$/mi|$/km|$=€}} → It is not possible to convert the currency. So, this result (mixed currencies) is not possible: Template:!mxt Template:Nay Using convert inside templates For usage in template code, like infoboxes, Template:Tlf has these options: Pre-formatting fraction input Module:Convert/helper can read regular input and pre-format it into Template:Tlf-accepted input. Your template can accept Template:Para and use {{#invoke:Convert/helper|number|16 7/8}} → {{#invoke:Convert/helper|number|16 7/8}} Using a Wikidata property Adding the Wikidata property code, like code Template:Para, to your template code automatically returns the Wikidata property for that article, and convert it. Both number and unit are read. Note: to return that property value for an other article, use Template:Para. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) {{convert|input=P2073|qid=Q1056131|ftin|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on}} → {{convert|input=P2073|qid=Q1056131|km|abbr=on|disp=out}} → For example see template:Infobox Telescope. Sometimes a property may have more than one value against it in Wikidata. You can use the Template:Para parameter to specify which of the values you want to use. Example for Template:Wikidata property link: Note: this example uses Template:Para (testing for Template:Wikidata entity link) Template:Wikidata entity link: {{convert|input=P2386|qual=Q613628|ft|abbr=on}} → Template:Wikidata entity link: {{convert|input=P2386|qual=Q1395645|ft|abbr=on}} → Parameter list Deprecated options TemplateData <templatedata> { "description": "Converts measurements to other units.", "params": { "1": { "label": "Value", "description": "The value to convert.", "type": "number", "required": true }, "2": { "label": "From unit", "description": "The unit for the provided value.", "type": "string", "example": "km", "required": true }, "3": { "label": "To units", "description": "The units to convert into. Separate units by a space for multiple outputs. In an output unit, use + for a multiplication space.", "type": "string", "example": "mi nmi", "suggested": true }, "4": { "label": "Precision or suffix", "description": "Significant digits after decimal dot or, if negative, exponent of ten.", "type": "number" }, "lk": { "label": "Link units", "description": "Indication of what units to apply wikilinks to. Use “on” for all, “in” for the input unit, “out” for the output units, or “off” for none of the units.", "default": "off", "type": "string", "example": "on" }, "abbr": { "label": "Abbreviation", "description": "Display for the units: “on” to display all units using their unit symbols, “off” to display all units in full words, “in” to display the unit symbol for the input unit, “out” to display the unit symbols for the output units, “unit” to display unit symbols for both input and output units when using scientific notation, “values” for no units at all (neither unit symbols nor full words of units).", "default": "out", "type": "string", "example": "on, unit, in, out, off", "suggested": true }, "sp": { "label": "Spelling", "description": "Spelling of units. Use “us” to display unit names using U.S. spelling.", "type": "string", "example": "us" }, "adj": { "label": "Adjective", "description": "Whether to use adjectival form. Use “on” for singular unit name appended by a hyphen, “mid” to put conversion at end, or “off” (default) for no adjectival form.", "type": "unbalanced-wikitext", "example": "on", "default": "off" }, "disp": { "label": "Conversion", "description": "Display conversion result: “or”: after ‘or’, “x”: with custom prefix and suffix, “b”: in parentheses, “table”/“tablecen”, “output only”: alone, “output number only”: alone and without unit, “unit”: not at all but input unit; if the value is a number it is used as precision.", "type": "string", "example": "b" }, "order": { "label": "Ordering", "description": "“flip” returns converted value first, input value second.", "type": "string", "example": "flip" }, "sigfig": { "label": "Significant figures", "description": "Indicates the number of significant figures to be used in rounding.", "type": "number" }, "round": { "label": "Rounding output", "description": "The type of rounding. “5” rounds the output number to nearest multiple of 5, “25” to nearest multiple of 25, “each” rounds each number in a range.", "type": "number" }, "comma": { "label": "Thousands separator", "description": "Sets or suppresses the use of thousands separators in the numbers. “off”: no separator; “gaps”: use space instead of comma as thousands separator; “5”: only add thousands separator when the integral part of the number uses 5 positions or more (10,000 or more; if using comma as thousands separator, 1234 would produce '1234', 12345 would produce '12,345').", "default": "on", "type": "string", "example": "off" }, "sortable": { "label": "Sort key", "description": "“on” generates a hidden sort key", "type": "string", "example": "on" }, "spell": { "label": "Spell numbers?", "description": "If used, spells input or input and output numbers in words, optionally capitalizing the first", "example": "'in', 'In', 'on', or 'On'", "type": "string" }, "sing": { "type": "string", "deprecated": "use adj=", "label": "Singular?", "description": "If 'yes', uses singular form of units (deprecated)", "example": "yes" }, "frac": { "label": "Fraction?", "description": "fraction as rounding unit", "type": "number" }, "$": { "label": "Currency symbol", "description": "sets currency symbol in both units", "example": "$=€ will show \" €10 per mile (€6.2/km)\"", "type": "string" }, "input": { "label": "WD property", "description": "Reads the property value of the item (article), then converts it", "example": " (P2046=area)", "type": "string" } }, "format": "inline" } </templatedata> See also Template:Temp Template:Temp Template:Temp to convert historical prices to their current equivalent. Template:Convert navs Template:Sandbox other at 3600 rpm

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