# Template:Convert

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Template {{convert}} 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:

`{}` → 2 kilometres (1.2 mi) (km entered, so converted into mile)
`{}` → 7 miles (11 km) (mi entered, so converted into km)

Numbers can be rounded, units can be abbreviated into symbols:

`{}` → 2 km (1.24 mi)
`{}` → 7 mi (11.27 km)

Value ranges can be entered using `|to|...` or `|-|...`:

`{}` → 2 to 5 kilometres (1.2 to 3.1 mi)
`{}` → 2–5 kilometres (1.2–3.1 mi)

Combined effect example:

`{}` → 2–5 km (1.24–3.11 mi)
`{}` → 2 and 5 kilometres (1.24 and 3.11 miles)

## Units to convert

Enter units to convert from into:

• `{}` → 1 pound (0.45 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 Category:Convert-like templates

## 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):

• `{}` → 1 pound (0.45 kg)

Using `|abbr=in` is the reverse behaviour to the default:

• `{}` → 1 lb (0.45 kilograms)

To abbreviate both or neither:

• `{}` → 1 lb (0.45 kg)
• `{}` → 1 pound (0.45 kilograms)

### Convenience: {{cvt}} has `|abbr=on` by default

Template {{cvt}} is the same as {{convert}}, except that it has `|abbr=on` as the default behaviour. In {{cvt}}, all other options are available. So:

`{}` → 1 lb (0.45 kg)

is equivalent to:

`{}` → 1 lb (0.45 kg)

Use `|adj=on` to produce the adjectival (hyphenated) form:

• `A {} distance` → A 10-mile (16 km) distance.

Default behaviour, for comparison:

• `{} to go` → 10 miles (16 km) to go.

`|adj=on` does not produce hyphens with unit symbols, as per Manual of Style:

• `A {} nail` → A 9 in (23 cm) nail.

## Rounding: 100 ft is 30 m or 30.5 m or 30.48 m?

By definition, 100 ft equals 30.48 m. In practical use, it is common to round the calculated metric number. With that, there are several possibilities.

### Default rounding

By {{Convert}} 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
`{}` 123 feet (40 m)
`{}` 123 feet (37 m) same output as with 0 (below)
`{}` 123 feet (37 m)
`{}` 123 feet (37.5 m)
`{}` 123 feet (37.49 m) The more-exact value is 37.4904 m or so, which gets converted to 37 m if this parameter is not specified at all.
`{}` 500 feet (150 m)
`{}` 500 feet (150 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)
`{}` 500 feet (152 m)
`{}` 500 feet (152.4 m)
`{}` 500 feet (152.40 m) exact value is 152.4 m
`{}` 500 feet (15,000 cm)
`{}` 500 feet (15,000 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)
`{}` 500 feet (15,240 cm)

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 ​110 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: `|sigfig=`

To specify the output number to be with n significant figures use `|sigfig=<number>`:

• `{}` → 1,200 feet (365.8 m)
• `{}` → 1,200 feet (366 m)
• `{}` → 1,200 feet (370 m)
• `{}` → 1,200 feet (400 m)

Default behaviour, for comparison:

• `{}` → 1,200 feet (370 m)

Setting `|sigfig=` to a value less than 1 is meaningless:

• `{}` → 1,200 feet (370 m)* N

### Round to a multiple of 5: 15, 20, 25, ...

Using `|round=5` rounds the outcome to a multiple of 5.

• `{}` → 10 metres (33 ft)
• `{}` → 10 metres (35 ft)

Similar: using `|round=25` rounds the outcome to a multiple of 25.

• `{}` → 10 metres (33 ft)
• `{}` → 10 metres (25 ft)

Default behaviour, for comparison:

• `{}` → 10 metres (32.81 ft)

In a range, one can round each value individually to the default. Use `|round=each`:

• `{}` → 10 by 200 by 3,000 metres (33 ft × 656 ft × 9,843 ft)
• `{}` → 10 by 200 by 3,000 metres (33 ft × 660 ft × 9,800 ft)

### Round to a multiple of a given fraction: ​2 3⁄16 inch

Specify the desired denominator using `|frac=<some positive integer>`. (Denominator is the below-the-slash number, for example the 3 in ​13).

• `{}` → 5.56 centimetres (2 316 in)
• `{}` → 8 centimetres (3 14 in)

The fraction is reduced when possible:

• `{}` → 8 centimetres (3 320 in)

Default behaviour uses decimal notation:

• `{}` → 5.56 centimetres (2.19 in)

### Rounding 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.

1. `{{convert|10,000|C|F K}}` → 10,000 °C (18,000 °F; 10,300 K)
2. `{{convert|10,000.1|C|F K}}` → 10,000.1 °C (18,032.2 °F; 10,273.2 K)
3. `{{convert|-272|C|F K}}` → −272 °C (−457.60 °F; 1.15 K)
4. `{{convert|-272|C}}` → −272 °C (−457.60 °F)
5. `{{convert|100|C|F K}}` → 100 °C (212 °F; 373 K)
6. `{{convert|0|C|F K}}` → 0 °C (32 °F; 273 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 0.1 degrees Celsius change is a 0.18 degrees Fahrenheit change, 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 `|sigfig=`:

`{{convert|10000|C|sigfig=5}}` → 10,000 °C (18,032 °F)

or you set the precision positionally, relative to the decimal point (zero being at the decimal point):

`{{convert|10000|C|0}}` → 10,000 °C (18,032 °F)

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 `{{#expr:}}` 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:

• `|adj=ri0`
• `|adj=ri1`
• `|adj=ri2`
• `|adj=ri3`

Note that there is no `|adj=ri-1`N 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:

• `{{convert|4.14159|mi|km|adj=ri0}}` → 4 miles (6.66524 km) N (precisions are mismatched)
• `{{convert|4.14159|mi|km|0|adj=ri0}}` → 4 miles (7 km)

In this case, if the input were rounded before conversion, a different result would be obtained:

• `{{convert|{{#expr:4.14159 round 0}}|mi|km|0}}` → 4 miles (6 km) N (double rounding)

## Into multiple units: 10 °C (50 °F; 283 K)

Separate the multiple output units by a space:

• `{}` → 10 °C (50 °F; 283 K)
• `{}` → 5 kilometres (3.1 mi; 2.7 nmi)

If the output unit names contain spaces, use `+` as the separator.

## Ranges of values

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:

Range separators in {}
Separator Convert Result Notes
`-` `{}` 3–6 feet (0.91–1.83 m) Input can be hyphen (-) or en dash (–), output uses en dash
`–` `&ndash;` (en dash) `{}` 3–6 feet (0.91–1.83 m)
`and` `{}` 3 and 6 feet (0.91 and 1.83 m)
`and(-)` `{}` 3 and 6 feet (0.91–1.83 m) `|abbr=on` abbreviates the first unit
`and(-)|abbr=on` `{}` 3 and 6 ft (0.91–1.83 m)
`or` `{}` 3 or 6 feet (0.91 or 1.83 m)
`to` `{}` 3 to 6 feet (0.91 to 1.83 m)
`to(-)` `{}` 3 to 6 feet (0.91–1.83 m) `|abbr=on` abbreviates the first unit
`to(-)|abbr=on` `{}` 3 to 6 ft (0.91–1.83 m)
`to about` `{}` 3 to about 6 feet (0.91 to about 1.83 m)
`+/-` `{}` 3 ± 6 feet (0.91 ± 1.83 m)
`±` `&plusmn;` `{}` 3 ± 6 feet (0.91 ± 1.83 m)
`+` `{}` 3 + 6 feet (0.91 + 1.83 m)
`,` `{}` 3, 6 feet (0.91, 1.83 m)
`, and` `{}` 3, and 6 feet (0.91, and 1.83 m)
`, or` `{}` 3, or 6 feet (0.91, or 1.83 m)
`by` `{}` 3 by 6 feet (0.91 by 1.83 m)
`x` `{}` 3 by 6 feet (0.91 m × 1.83 m) `|abbr=on` abbreviates and repeats the first unit
`×` `&times;` `{}` 3 by 6 feet (0.91 m × 1.83 m)
`x|abbr=on` `{}` 3 ft × 6 ft (0.91 m × 1.83 m)
`xx` |xx| is deprecated. Use |x| instead
`*` |*| is deprecated. Use |x| instead

### Multiple dimensions: 6 m × 12 m (20 ft × 39 ft)

Use `by`:

• `{}` → 6 by 12 feet (1.8 by 3.7 m)

Use `×`, multiplication sign, or `x`, letter:

• `{}` → 6 by 12 metres (20 ft × 39 ft)

In science, the formal way is to set `|x|` and `|abbr=on` (keeping dimensions right, like in area = x km2):

• `{}` → 6 m × 12 m (20 ft × 39 ft)

### Lists of values: 20, 40, or 60 miles

`{}` → 20, 40, or 60 miles (32, 64, or 97 km)

### 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:

Default behaviour, for comparison:

• `{}` → 1 foot 3 inches (380 mm)

## 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 `|sp=us`:

`{}` → 1 metre (3.3 ft)—default
`{}` → 1 meter (3.3 ft)

### Spell out numbers: ten miles

To write a number in words, use `|spell=in`:

• `{}` → ten miles (16,000 m)

To spell out both in and out values, use `|spell=on`:

• `{}` → ten miles (sixteen thousand metres)

To make first letter a capital, use `|spell=In`, `|spell=On`

• `{}` → Ten miles (16,000 m)
• `{}` → Ten miles (sixteen thousand metres)

Remember that the spelling of the units (ft, m) is independently set by `|abbr=`. To the extreme:

• `{}` → ten miles (sixteen thousand meters)

### Inserted before units: 4 planted acres

• `{}` → 4 planted acres (1.6 ha)

`disp=preunit` is similar, but has no separator after the specified text, and can have different text for the output value:

• `{}` → 4 planted acres (1.6 planted ha)
• `{}` → 4 planted acres (1.6 reforested-ha)

### After adjective unit: A 10-foot-long corridor

Note that two units (in this case, ft and m) are required. Use with just one unit will generate an error message.

`{}` → 10-foot-long (3.0 m)

### Plurals: 1 inch, 2 inches

The unit symbol is singular always. Depending on the preceding number only, a unit name can be shown plural.

• `{}` → 1 metre (3 ft 3 in)
• `{}` → 2 metres (6 ft 7 in)
• `{}` → 2 m (6 ft 7 in)
Exception

Entering the unit spelled `|foot|` forces singular output "foot", whatever the number is.

• `{}` → 100 foot (30 metres)

### Fractions: one-eighth of an imperial pint

The convert template also supports spelling out fractions.

• `{}` → three and a half ounces (99 g)

Any additional words needed for the fraction can also be added at the end of the template.

• `{}` → one-eighth of an imperial pint (71 ml)

### Wrapping and line breaking

See Help:Convert § Wrapping and line breaking

### Spelling out "thousands", "millions", etc.

Most unit codes accept a prefix of e3 (thousand) or e6 (million) or e9 (billion).

• `{}` → 100 million miles (160×106 km)
• `{}` → 120 million acres (490,000 km2)
• `{}` → 120 million acres (490×103 km2)

To display both input and output in scientific notation, use `|abbr=on`

• `{}` → 100×106 mi (160×106 km)

To spell out "thousands", "millions", etc., `|abbr=unit` abbreviates the unit; `|abbr=off` displays both full unit names.

• `{}` → 100 million mi (160 million km)
• `{}` → 100 million miles (160 million kilometres)

## Numbers

### Using an SI prefix: gigameter (Gm), or micrometer (μm)

Metric prefixes
Text Symbol Factor
yotta Y 1024
zetta Z 1021
exa E 1018
peta P 1015
tera T 1012
giga G 109
mega M 106
kilo k 103
hecto h 102
deca da 101
(none) (none)  1
deci d 10−1
centi c 10−2
milli m 10−3
micro μ 10−6
nano n 10−9
pico p 10−12
femto f 10−15
atto a 10−18
zepto z 10−21
yocto y 10−24

Units can have an SI prefix like `G` before the unit: `Gm`, and `giga` before the name: `gigameter`. These are plain multiplication factors.

To illustrate, these are trivial calculations (from meter to meter), showing the multiplication factor:

• 12 Gm (1.2×1010 m)
• 12 μm (1.2×10−5 m)

The prefix can be added before the SI unit (here: unit `m` for meter):

• `{}` → 12 Gm (7,500,000 mi)
• `Mm`: 12 Mm (7,500 mi)
• `km`: 12 km (39,000 ft)
• `mm`: 12 mm (0.47 in)
• `μm`: 12 μm (0.012 mm)
• `um`: 12 μm (0.012 mm) (letter "u" can be used for "μ" here)

The prefix can be used in the output unit:

• `{}` → 12,000 mi (19 Mm)
• `{}` → 12 in (300,000 μm)

As an exception, the non-SI unit "inch" can have the "μ" prefix too:

• `{}` → 12 μm (470 μin)

### Engineering notation: 7 × 106 m

#### In the unit: e6m

Engineering notation can be entered as a "prefix" to the unit:

• `{}` → 70×106 m (230,000,000 ft)

The same is possible for the output unit:

• `{}` → 23,000,000 feet (7.0×106 m)

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 1.23×10−14. The plain number has exactly one digit before the decimal point.

With {{convert}}, 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.

• `{}` → 12.3×10−15 atm (1.23×10−14 atm)
• `{}` → 0.00000005 atm (5.0×10−8 atm)

### Input with fractions: 1 1⁄2 inches (38.1 mm)

The number to convert can be written in fractions. Both `/` (keyboard slash) and `⁄` (fraction slash) are accepted:

• `{}`12 inch (12.7 mm)
• `{}`12 inch (12.7 mm)

With positive mixed numbers (a positive integer and a fraction), use a `+` sign

• `{}`2 12 inches (63.5 mm)

With negative mixed numbers, use a hyphen `-` and repeat it:

• `{}`−2 12 inches (−63.5 mm)

Note that the following cases are not interpreted as mixed numbers:

• `{}` → 2–12 inch (50.8–12.7 mm). This is interpreted as a range from 2 inches to 1⁄2 inch.
• `{}`[convert: invalid number] N This is neither a mixed number nor a range, and mathematical expressions requiring calculations are not allowed here.

### Output with horizontal fraction bar in: 1/2 inch

Using a double slash (`//`) returns a horizontal bar fraction:

• `{}`1/2 inch (12.7 mm)
• `{}`2 1/2 inches (63.5 mm)

### 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:

• `{}` → 1,234,567 metres (4,050,417 ft)
• `{}` → 1,234,567 metres (4,050,417 ft)
• `{}`[convert: invalid number] N

Set `|comma=off` to remove the separator from the output:

• `{}` → 1234567 metres (4050417 ft)

Use `|comma=gaps` to use digit grouping by gap (thin space) as a thousands separator:

• `{}`1234567 metres (4050417 ft)

Default behaviour, for comparison:

• `{}` → 1,234,567 metres (4,050,417 ft)

Setting `|comma=5` will only add the separator when the number of digits is 5 or more:

• `{}` → 1234 metres (4049 ft)
• `{}` → 1,234,567 metres (4,050,417 ft)

Default behaviour, for comparison:

• `{}` → 1,234 metres (4,049 ft)

## Output manipulation

### Brackets and separators: 10 m [33 ft]

Punctuation that distinguishes the two measurements is set by `|disp=`.
Options are: `b` (the default), `sqbr`, `comma`, `or`, `br`, `x|…`:

• `{}` → 10 metres [33 ft]
• `{}` → 10 metres, 33 ft
• `{}` → 10 metres or 33 feet

Default behaviour, for comparison:

• `{}` → 10 metres (33 ft)

Setting `|disp=br` will force a new line (`<br/>`)

• `{}` → 10 metres
33 feet

Also `|disp=br()` will force a new line, and keep the brackets (useful in tables):

• `{}` → 10 metres
(33 feet)

Setting `|disp=x|…` allows any text as separator:

• `{}` → 10 metres_MyText_33 ft (To display spaces, use `&nbsp;`)

### Flipping (reordering) the two measurements: 1,609.3 metres (1 mile)

Setting `|order=flip` will flip (swap) the two measurements:

• `{}` → 1,609.3 metres (1 mile)

Default behaviour, for comparison:

• `{}` → 1 mile (1,609.3 metres)

When converting to multiple units, the effect is:

• `{}` → 6.2137 miles; 5.3996 nautical miles (10 kilometres)
• `{}` → 5.3996 nautical miles; 6.2137 miles (10 kilometres)

### Fixed ordering of output units: 212 °F (100 °C; 373 K)

Setting `|order=out` shows the output-units as ordered; the input unit is skipped:

• `{}` → 212 °F (100 °C; 373 K)
• `{}` → 147 kW (197 hp)

### Displaying parts of the result: 2 (1.5)

It is possible to display only parts of the conversion result:

Convert Output Returns
`{}` 2 cubic yards (1.5 m3) Regular output (for comparison)
`{}` 2 (1.5) Input and output numbers
`{}` cubic yards Input unit
`{}` cubic-yard Input unit, adjective (hyphenated)
`{}` 2.0 cu yd Input (workaround. Note repetition of unit in input)
`{}` 2 cubic yards [cu yd] (1.5 m3) Input: both name and symbol
`{}` m3 Output unit (symbol)
`{}` cubic metres Output unit (name)
`{}` 1.5 Output value
`{}` 1.5 m3 Output value and unit name
`{}` 1.5 cubic metres Output value and unit symbol

### Display both input name and symbol: 2 kilopascals [kPa]

Setting `|abbr=~` returns both name and symbol of the first (input) unit:

• `{}` → 2 kilopascals [kPa] (0.29 psi)
• `A {} pressure`A 2-kilopascal [kPa] (0.29 psi) pressure

## 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

`|disp=br` adds a line-break and omits brackets.

`|disp=br()` adds a line-break and does add brackets to the converted value. This may be useful in tables:

`|disp=br` `|disp=br()`
100 kilometres
62 miles
100 kilometres
(62 miles)

### Table columns

Using in a table cell, with `|disp=table` splits the result over two (or more) columns. By default units are not included in the table, however, they can be added using the `|abbr=` parameter. Multiple-unit outputs, like `ftin`, always output their units to the table.

`{}`

`style="text-align:right;"|10 |style="text-align:right;"|33`

`|disp=tablecen` does the same, and also centers the text:

`{}`

`style="text-align:center;"|20 |style="text-align:center;"|66`

metres feet feet and inches
`|disp=table` 10 33 32 ft 10 in
`|disp=table` and `|abbr=on` 20 m 66 ft 65 ft 7 in
`|disp=table` and `|abbr=off` 30 metres 98 feet 98 feet 5 inches
`|disp=tablecen` 40 130 131 ft 3 in
`|disp=<other>` (default) 50 metres (160 ft; 164 ft 1 in)

### Sorting

Use `|sortable=on` 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:

`{}` `<span data-sort-value="7001100000000000000♠"></span>10 metres (33 ft)`
showing: 10 metres (33 ft).

Use both `|disp=table` and `|sortable=on` together to produce table columns (pipe symbols) for each value in sortable columns:

m ft
A 15 34 52
B 15.5 51
C 16.0 52.5
D 16 52

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

The table below lists units supported by {{convert}}. More complete lists are linked for each dimension. For a complete list of all dimensions, see full list of units.

{{Convert}} uses unit-codes, which are similar to, but not necessarily exactly the same as, the usual written abbreviation for a given unit. These unit-codes are displayed in column 3 of the following tables. These are accepted as input by {{convert}} as the second and third unnamed parameters:

• `{}` → 100 kilograms (220 lb)
• `{}` → 100 pounds (45 kg)

The unit-codes should be treated as case-sensitive:

• `{}` → 100 megametres (1.0×1011 mm)

The output of {{convert}} can display multiple converted units, if further unit-codes are specified after the second unnamed parameter (without the pipe separator). Typical combination output units are listed below in column 7.

• `{}` → 55 nautical miles (102 km; 63 mi)
• `{}` → 1 ounce (0.91 ozt; 28 g; 440 gr)

Some units have alternative unit-codes. These are shown in brackets in column 3, e.g. `°F` (`F`). Either may be entered for Fahrenheit (but not a lower-case f).

Abridged list of supported units
Explanation
system unit unit-
code
symbol or
abbrev.
notes sample default
conversion
combination
output units
the system(s) to which the unit belongs units listed by name unit-code to use in template symbols shown in output other notes about the units sample of the default conversion for the unit output codes for multiple conversions

AREA
(Full list)
system unit unit-
code
abbrev-
iation
notes sample default
conversion
combination
output units
SI square kilometre km2 km2 US spelling: square kilometer
1.0 km2 (0.39 sq mi)
• km2 sqmi
square metre m2 m2 US spelling: square meter
1.0 m2 (11 sq ft)
• m2 sqft
square centimetre cm2 cm2 US spelling: square centimeter
1.0 cm2 (0.16 sq in)
• cm2 sqin
square millimetre mm2 mm2 US spelling: square millimeter
1.0 mm2 (0.0016 sq in)
• mm2 sqin
non-SI metric hectare ha ha 1.0 ha (2.5 acres)
Imperial
&
US customary
square mile sqmi sq mi 1.0 sq mi (2.6 km2)
• sqmi km2
acre acre (none) 1.0 acre (0.40 ha)
square yard sqyd sq yd 1.0 sq yd (0.84 m2)
square foot sqft
(sqfoot)
sq ft long code "sqfoot" outputs square foot (and never feet) 1.0 sq ft (0.093 m2)
• sqft m2 (sqfoot m2)
square inch sqin sq in 1.0 sq in (6.5 cm2)
• sqin cm2
Other square nautical mile sqnmi sq nmi 1.0 sq nmi (3.4 km2; 1.3 sq mi)
dunam dunam (none) For alternative spellings and definitions see the full list 1.0 dunam (0.0010 km2; 0.00039 sq mi)
tsubo tsubo (none) 1.0 tsubo (3.3 m2)

DENSITY
system unit unit-
code
abbrev-
iation
notes sample default
conversion
combination
output units
Metric kilogram per cubic metre kg/m3 kg/m3 1.0 kg/m3 (1.7 lb/cu yd)
• kg/m3 lb/ft3 (kg/m3 lb/cuft)
• kg/m3 lb/yd3 (kg/m3 lb/cuyd)
gram per cubic metre g/m3 g/m3 1.0 g/m3 (0.0017 lb/cu yd)
• g/m3 kg/m3
• g/m3 lb/ft3 (g/cm3 lb/cuft)
• g/m3 lb/yd3 (g/cm3 lb/cuyd)
Imperial
&
US customary
pound per cubic foot lb/ft3 lb/cu ft 1.0 lb/cu ft (0.016 g/cm3)
• lb/ft3 kg/m3 (lb/cu ft g/m3)
• lb/ft3 g/m3 (lb/cu ft g/m3)
pound per cubic yard lb/yd3 lb/cu yd 1.0 lb/cu yd (0.59 kg/m3)
• lb/yd3 kg/m3 (lb/cuyd kg/m3)
• lb/yd3 g/m3 (lb/cuyd g/m3)

ENERGY
(Full list)
system unit unit-
code
abbrev-
iation
notes sample default
conversion
combination
output units
SI gigajoule GJ GJ 1.0 GJ (280 kWh)
megajoule MJ MJ 1.0 MJ (0.28 kWh)
kilojoule kJ kJ 1.0 kJ (240 cal)
hectojoule hJ hJ 1.0 hJ (24 cal)
decajoule daJ daJ 1.0 daJ (2.4 cal)
joule J J 1.0 J (0.24 cal)
decijoule dJ dJ 1.0 dJ (0.024 cal)
centijoule cJ cJ 1.0 cJ (0.0024 cal)
millijoule mJ mJ 1.0 mJ (0.00024 cal)
microjoule μJ (uJ) μJ 1.0 μJ (2.4×10−7 cal)
nanojoule nJ nJ 1.0 nJ (2.4×10−10 cal)
cgs megaerg Merg Merg 1.0 Merg (0.10 J)
kiloerg kerg kerg 1.0 kerg (0.10 mJ)
erg erg (none) 1.0 erg (0.10 μJ)
Watt-hour multiples terawatt-hour TWh TWh 1.0 TWh (3.6 PJ)
TW.h TW⋅h
gigawatt-hour GWh GWh 1.0 GWh (3.6 TJ)
GW.h GW⋅h
megawatt-hour MWh MWh 1.0 MWh (3.6 GJ)
MW.h MW⋅h
kilowatt-hour kWh kWh 1.0 kWh (3.6 MJ)
kW.h kW⋅h
watt-hour Wh Wh 1.0 Wh (3.6 kJ)
W.h W⋅h
Electron-
volt
multiples
gigaelectronvolt GeV GeV 1.0 GeV (0.16 nJ)
megaelectronvolt MeV MeV 1.0 MeV (0.16 pJ)
kiloelectronvolt keV keV 1.0 keV (0.16 fJ)
electronvolt eV eV 1.0 eV (0.16 aJ)
millielectronvolt meV meV 1.0 meV (0.16 zJ)
Calorie multiples calorie Cal Cal The thermo-chemical calorie is the default definition. For others, see the full list. 1.0 Cal (4.2 kJ)
megacalorie Mcal Mcal 1.0 Mcal (4.2 MJ)
kilocalorie kcal kcal 1.0 kcal (4.2 kJ)
calorie cal cal 1.0 cal (4.2 J)
millicalorie mcal mcal 1.0 mcal (4.2 mJ)
pound/
ounce
-foot/
inch-hour-minute-second
foot-poundal ftpdl ft⋅pdl 1.0 ft⋅pdl (0.042 J)
foot-pound force ftlbf ft⋅lbf 1.0 ft⋅lbf (1.4 J)
ftlb-f ft⋅lbf
inch-pound force inlbf in⋅lbf 1.0 in⋅lbf (110 mJ)
inlb-f in⋅lbf
inch-ounce force inozf in⋅ozf 1.0 in⋅ozf (7.1 mJ)
inoz-f in⋅ozf
horsepower-hour hph hp⋅h 1.0 hp⋅h (0.75 kWh)
British thermal unit British thermal unit Btu Btu The International Steam Table British thermal unit is used. For others, see the full list. 1.0 Btu (1.1 kJ)
BTU BTU
TNT-based units gigatonne of TNT GtTNT (none) 1.0 gigatonne of TNT (4.2 EJ)
gigaton of TNT GtonTNT (none)
megatonne of TNT MtTNT (none) 1.0 megatonne of TNT (4.2 PJ)
megaton of TNT MtonTNT Mt
kilotonne of TNT ktTNT (none) 1.0 kilotonne of TNT (4.2 TJ)
kiloton of TNT ktonTNT kt
tonne of TNT tTNT (none) 1.0 tonne of TNT (4.2 GJ)
ton of TNT tonTNT (none)
Other
Hartree Eh Eh 1.0 Eh (27 eV)
rydberg Ry Ry 1.0 Ry (14 eV)
tonne of oil equivalent toe toe 1.0 toe (42 GJ)
barrel of oil equivalent BOE BOE 1.0 BOE (6.1 GJ)
cubic foot of natural gas cuftnaturalgas (cufootnaturalgas) Unit-code cufootnaturalgas will show "cubic foot of natural gas" if plural. 1.0 cubic foot of natural gas (1.1 MJ)
litre-atmosphere latm l⋅atm 1.0 l⋅atm (100 J)
Latm L⋅atm
imperial gallon-atmosphere impgalatm imp gal⋅atm 1.0 imp gal⋅atm (460 J)
US gallon-atmosphere USgalatm
(usgalatm)
US gal⋅atm 1.0 US gal⋅atm (380 J)
U.S.galatm
(usgalatm)
U.S. gal⋅atm

FORCE
(Full list)
system unit unit-
code
abbrev-
iation
notes sample default
conversion
combination
output units
SI giganewton GN GN Allows triple output units. See: full list. 1.0 GN (220,000,000 lbf)
• GN LT-f
• GN LTf
• GN ST-f
• GN STf
meganewton MN MN Allows triple output units. See: full list. 1.0 MN (220,000 lbf)
• MN LT-f
• MN LTf
• MN ST-f
• MN STf
kilonewton kN kN Allows triple output units. See: full list. 1.0 kN (220 lbf)
• kN LT-f
• kN LTf
• kN ST-f
• kN STf
newton N N 1.0 N (0.22 lbf)
• N lb-f
• N lbf
• N oz-f
• N ozf
millinewton mN mN 1.0 mN (0.0036 ozf)
• mN oz-f
• mN ozf
• mN gr-f
• mN grf
micronewton μN (uN) μN 1.0 μN (0.0016 grf)
• μN gr-f
• μN grf
nanonewton nN nN 1.0 nN (1.6×10−6 grf)
• nN gr-f
• nN grf
cgs megadyne Mdyn Mdyn 1.0 Mdyn (2.2 lbf)
kilodyne kdyn kdyn 1.0 kdyn (0.036 ozf)
dyne dyn
(dyne)
dyn 1.0 dyn (0.016 grf)
millidyne mdyn mdyn 1.0 mdyn (1.6×10−5 grf)
Metric gravitational units tonne-force t-f tf 1.0 tf (9.8 kN; 0.98 LTf; 1.1 STf)
tf tf
kilogram-force kg-f kgf 1.0 kgf (9.8 N; 2.2 lbf)
kgf kgf
gram-force g-f gf 1.0 gf (9.8 mN; 0.035 ozf)
gf gf
milligram-force mg-f mgf 1.0 mgf (9.8 μN; 0.015 grf)
mgf mgf
Avoirdupois-based units poundal pdl pdl 1.0 pdl (0.14 N)
long ton-force LT-f LTf 1.0 LTf (10.0 kN)
• LT-f ST-f
LTf long ton-force
• LTf STf
short ton-force ST-f STf 1.0 STf (8.9 kN)
• ST-f LT-f
STf short ton-force
• STf LTf
pound-force lb-f lbf 1.0 lbf (4.4 N)
lbf lbf
grain-force gr-f grf 1.0 grf (640 μN)
grf grf

LENGTH
(Full list)
system unit unit-
code
abbrev-
iation
notes sample default
conversion
combination
output units
SI megametre Mm Mm US spelling: megameter
1.0 Mm (620 mi)
kilometre km km US spelling: kilometer
1.0 km (0.62 mi)
• km mi
metre m m US spelling: meter
1.0 m (3 ftin)
• m ft
• m ftin
centimetre cm cm US spelling: centimeter
1.0 cm (0.39 in)
• cm in
millimetre mm mm US spelling: millimeter
1.0 mm (0.039 in)
• mm in
micrometre μm (um) μm US spelling: micrometer
1.0 μm (3.9×10−5 in)
nanometre nm nm US spelling: nanometer
1.0 nm (3.9×10−8 in)
non-SI metric ångström Å
(angstrom)
Å 1.0 Å (3.9×10−9 in)
Imperial
&
US customary
mile mi mi 1.0 mi (1.6 km)
• mi km
furlong furlong (none) 1.0 furlong (660 ft; 200 m)
chain chain (none) 1.0 chain (66 ft; 20 m)
rod rd rd For other names of this unit see the full list. 1.0 rd (17 ft; 5.0 m)
fathom fathom (none) fathom ≡ 6 ft 1.0 fathom (6.0 ft; 1.8 m)
yard yd yd assumes the international definition 1.0 yd (0.91 m)
foot ft (foot) ft long code "foot" outputs foot (and never feet) 1.0 ft (0.30 m)
• ftin (feet and inches)
• ft m (foot m)
inch in in 1.0 in (25 mm)
• in cm
• in mm
Other nautical mile nmi nmi the international standard nautical mile
For other nautical miles see the full list.
1.0 nmi (1.9 km; 1.2 mi)
parsec pc pc 1.0 pc (3.3 ly)
light-year ly ly 1.0 ly (63,000 AU)
astronomical unit AU AU 1.0 AU (150,000,000 km; 93,000,000 mi)

MASS
(Full list)
system unit unit-
code
abbrev-
iation
notes sample default
conversion
combination
output units
SI kilogram kg kg Allows triple output units. See: full list. 1.0 kg (2.2 lb)
• kg lb
• kg st
gram g g 1.0 g (0.035 oz)
• g oz
milligram mg mg 1.0 mg (0.015 gr)
• mg gr
microgram μg (ug) μg 1.0 μg (1.5×10−5 gr)
non-SI metric tonne t t Allows triple output units. See: full list. 1.0 t (0.98 long tons; 1.1 short tons)
• t LT
• t ST
metric ton MT t
• MT LT
• MT ST
Avoirdupois long ton LT (none) 2,240 lb
used mostly in the British Commonwealth.
Allows triple output units. See: full list.
1.0 long ton (1.0 t)
• LT t
• LT MT
• LT ST
long ton long ton
short ton ST (none) 2,000 lb
used mostly in the US.
Allows triple output units. See: full list.
1.0 short ton (0.91 t)
• ST t
• ST MT
• ST LT
short ton short ton
stone st st 14 lb
used mostly in the British Commonwealth except Canada.
Allows triple output units. See: full list.
1.0 st (14 lb; 6.4 kg)
• st kg
• st lb
pound lb lb Allows triple output units. See: full list. 1.0 lb (0.45 kg)
• lb kg
• lb st
ounce oz oz 1.0 oz (28 g)
• oz g
drachm drachm (none) 1.0 drachm (1.8 g)
drachm dram (none)
grain gr gr equivalent to the troy grain 1.0 gr (0.065 g)
Troy troy ounce ozt ozt 1.0 ozt (1.1 oz; 31 g)
other carat carat (none) 1.0 carat (0.20 g)

SPEED
(Full list)
system unit unit-
code
abbrev-
iation
notes sample default
conversion
combination
output units
SI metre per second m/s m/s US spelling: meter per second
1.0 m/s (3.3 ft/s)
• m/s ft/s (m/s foot/s)
non-SI metric kilometre per hour km/h km/h US spelling: kilometer per hour
1.0 km/h (0.62 mph)
• km/h mph
Imperial
&
US customary
mile per hour mph mph 1.0 mph (1.6 km/h)
• mph km/h
• mph kn
foot per second ft/s (foot/s) ft/s long code "foot/s" outputs foot per second (and never feet) 1.0 ft/s (0.30 m/s)
• ft/s m/s
Maritime units knot kn (knot) kn 1.0 kn (1.9 km/h; 1.2 mph)
• kn mph

TEMPERATURE
(Full list)
system unit unit-
code
abbrev-
iation
notes sample default
conversion
combination
output units
SI K K K Allows triple output units. See: full list. 1.0 K (−272.15 °C; −457.87 °F)
• K °C (K C)
• K °R (K R)
• K °F (K F)
°C °C (C) °C 1.0 °C (33.8 °F)
• °C K (C K)
• °C °R (C R)
• °C °F (C F)
Imperial
&
US customary
°R °R (R) °R 1.0 °R (0.556 K; −458.670 °F; −272.594 °C)
• °R K (R K)
• °R °C (R C)
• °R °F (R F)
°F °F (F) °F 1.0 °F (−17.2 °C)
• °F K (F K)
• °F °C (F C)
• °F °R (F R)
Celsius change C-change Used for temperature intervals instead of actual temperatures
Example:  {} warmer
Result: 5 °C (9 °F) warmer
Fahrenheit change F-change Used for temperature intervals instead of actual temperatures
Example:  {} colder
Result: 10 °F (6 °C) colder

TORQUE
(Full list)
system unit unit-
code
abbrev-
iation
notes sample default
conversion
combination
output units
Industrial
SI newton metre Nm N⋅m Triple combinations are also possible. See the full list. 1.0 N⋅m (0.74 lbf⋅ft)
• Nm kg.m
• Nm lb.ft
Non-SI metric kilogram metre kg.m kg⋅m 1.0 kg⋅m (9.8 N⋅m; 7.2 lb⋅ft)
• kg.m Nm
• kg.m lb.ft
Imperial
&
US customary
pound force-foot lb.ft lb⋅ft 1.0 lb⋅ft (1.4 N⋅m)
• lb.ft Nm
• lb.ft kg-m
Scientific
SI newton metre N.m N⋅m Triple combinations are also possible. See the full list. 1.0 N⋅m (0.74 lbf⋅ft)
• N.m kgf.m
• N.m lbf.ft
Non-SI metric kilogram force-metre kgf.m kgf⋅m 1.0 kgf⋅m (9.8 N⋅m; 7.2 lbf⋅ft)
• kgf.m N.m
• kgf.m lbf.ft
Imperial
&
US customary
pound force-foot lbf.ft lbf⋅ft 1.0 lbf⋅ft (1.4 N⋅m)
• lbf.ft N.m
• lbf.ft kgf.m

VOLUME
(Full list)
system unit unit-
code
abbrev-
iation
notes sample default
conversion
combination
output units
SI cubic metre m3 m3 US spelling: cubic meter
one kilolitre
1.0 m3 (35 cu ft)
cubic centimetre cm3 cm3 US spelling: cubic centimeter
one millilitre
1.0 cm3 (0.061 cu in)
cc cc
cubic millimetre mm3 mm3 US spelling: cubic millimeter
1.0 mm3 (6.1×10−5 cu in)
non-SI metric kilolitre kl kl US spelling: kiloliter
one cubic metre
1.0 kl (35 cu ft)
kL kL
litre l l US spelling: liter
one cubic decimetre
Allows triple output units. See: full list.
1.0 l (0.22 imp gal; 0.26 US gal)
• l impgal
• l USgal
• l U.S.gal
• l USdrygal
• l U.S.drygal
L L
• L impgal
• L impqt
• L USgal
• L U.S.gal
• L USdrygal
• L U.S.drygal
centilitre cl cl US spelling: centiliter
1.0 cl (0.35 imp fl oz; 0.34 US fl oz)
cL cL
millilitre ml ml US spelling: milliliter
one cubic centimetre
1.0 ml (0.035 imp fl oz; 0.034 US fl oz)
• ml impoz
• ml USoz
• ml U.S.oz
mL mL
• mL impoz
• mL USoz
• mL U.S.oz
Imperial
&
US customary
cubic yard cuyd cu yd 1.0 cu yd (0.76 m3)
cubic foot cuft (cufoot) cu ft long code "cufoot" outputs cubic foot (and never feet) 1.0 cu ft (0.028 m3)
cubic inch cuin cu in 1.0 cu in (16 cm3)
Imperial imperial barrel impbbl imp bbl 36 imp gal 1.0 imp bbl (160 l; 36 imp gal; 43 US gal)
imperial bushel impbsh imp bsh 8 imp gal 1.0 imp bsh (36 l; 8.0 imp gal; 8.3 US dry gal)
impbu imp bu
imperial gallon impgal imp gal 4.54609 litres by definition, also
4 imp qt or 8 imp pt or 160 imp fl oz
Allows triple output units. See: full list.
1.0 imp gal (4.5 l; 1.2 US gal)
• impgal l
• impgal L
• impgal USgal
• impgal U.S.gal
• impgal USdrygal
• impgal U.S.drygal
imperial quart impqt imp qt 1/4 imp gal or 40 imp fl oz 1.0 imp qt (1,100 ml; 38 US fl oz)
imperial pint imppt imp pt 1/8 imp gal or 20 imp fl oz 1.0 imp pt (0.57 l)
imperial fluid ounce impoz (impfloz) imp fl oz 1/160 imp gal 1.0 imp fl oz (28 ml; 0.96 US fl oz)
• impoz USoz
• impoz U.S.oz
• impoz ml
• impoz mL
US customary
liquid measure
US barrel USbbl US bbl 31½ US gal
used for liquids except for oil and beer (see the full list)
1.0 US bbl (120 l; 32 US gal; 26 imp gal)
U.S.bbl U.S. bbl
barrel oilbbl bbl 42 US gal 1.0 bbl (0.16 m3)
US beer barrel USbeerbbl
(usbeerbbl)
US bbl 1.0 US bbl (120 l; 31 US gal; 26 imp gal)
U.S.beerbbl
(usbeerbbl)
U.S. bbl
US gallon USgal US gal 231 cubic inches by definition, also
4 US qt or 8 US pt or 128 US fl oz
Allows triple output units. See: full list.
1.0 US gal (3.8 l; 0.83 imp gal)
• USgal l
• USgal L
• USgal impgal
U.S.gal U.S. gal
• USgal l
• USgal L
• USgal impgal
US quart USqt US qt 1/4 US gal or 32 US fl oz 1.0 US qt (950 ml)
U.S.qt U.S. qt
US pint USpt US pt 1/8 US gal or 16 US fl oz 1.0 US pt (0.47 l; 0.83 imp pt)
U.S.pt U.S. pt
US fluid ounce USoz
(USfloz)
US fl oz 1/128 US gal 1.0 US fl oz (30 ml)
• USoz ml
• USoz mL
• USoz impoz
U.S.oz
(U.S.floz)
U.S. fl oz
• U.S.oz ml
• U.S.oz mL
• U.S.oz impoz
US customary
dry measure
US dry barrel USdrybbl US dry bbl 105/32 US bsh 1.0 US dry bbl (0.12 m3)
U.S.drybbl U.S. dry bbl
US bushel USbsh US bsh 2150.42 cubic inches by definition 1.0 US bsh (35 l; 8.0 US dry gal; 7.8 imp gal)
U.S.bsh U.S. bsh
US bushel USbu US bu 2150.42 cubic inches by definition 1.0 US bu (35 l; 8.0 US dry gal; 7.8 imp gal)
U.S.bu U.S. bu
US dry gallon USdrygal US dry gal 1/8 US bsh
Allows triple output units. See: full list.
1.0 US dry gal (4.4 l)
• USdrygal l
• USdrygal L
• USdrygal impgal
U.S.drygal U.S. dry gal
• U.S.drygal l
• U.S.drygal L
• U.S.drygal impgal
US dry quart USdryqt US dry qt 1/32 US bsh 1.0 US dry qt (1,100 ml)
U.S.dryqt U.S. dry qt
US dry pint USdrypt US dry pt 1/32 US bsh 1.0 US dry pt (550 ml)
U.S.drypt U.S. dry pt

PRESSURE
unit unit-
code
abbrev-
iation
sample default
conversion
gigapascal GPa GPa 1.0 GPa (150,000 psi)
megapascal MPa MPa 1.0 MPa (150 psi)
kilopascal kPa kPa 1.0 kPa (0.15 psi)
hectopascal hPa hPa 1.0 hPa (0.015 psi)
pascal Pa Pa 1.0 Pa (0.00015 psi)
millipascal mPa mPa 1.0 mPa (1.5×10−7 psi)
millibar mbar mbar 1.0 mbar (1.0 hPa)
mb mb
decibar dbar dbar 1.0 dbar (10 kPa)
bar bar (none) 1.0 bar (100 kPa)
kilobarye kBa kBa 1.0 kBa (1.0 hPa)
barye Ba Ba 1.0 Ba (0.10 Pa)
standard atmosphere atm atm 1.0 atm (100 kPa)
torr Torr Torr 1.0 Torr (0.13 kPa)
millimetre of mercury mmHg mmHg 1.0 mmHg (0.13 kPa)
inch of mercury inHg inHg 1.0 inHg (3.4 kPa)
pound per square inch psi psi 1.0 psi (6.9 kPa)
FUEL EFFICIENCY
unit unit-
code
notes combinations
kilometres per litre km/l (km/L) Use `km/L` to get "km/L"
• km/l mpgimp
• km/l mpgus
litres per 100 kilometres l/100 km (L/100 km) Use `L/100 km` to get "L/100 km"
• l/100 km mpgimp
• l/100 km mpgus
litres per kilometre l/km (L/km) Use `L/km` to get "L/km"
• l/km impgal/mi
• l/km usgal/mi
miles per imperial gallon mpgimp
• mpgimp mpgus
miles per US gallon mpgus (mpgUS, mpgU.S.) Use `mpgUS` to get "US"

Use `mpgU.S.` to get "U.S."
`mpgus` will give "U.S." if spelling is
set to US & "US" otherwise

• mpgus mpgimp
imperial gallons per mile impgal/mi
• impgal/mi
US gallons per mile usgal/mi (USgal/mi, U.S.gal/mi) As above with the `us` vs `US` vs `U.S.`
• usgal/mi
The `mpgUS`, `mpgU.S.`, `USgal/mi` vs `U.S.gal/mi`, `km/L`, `L/100 km` and `L/km` variants work within combinations also (making 36 combinations in total).
POPULATION DENSITY
unit unit-
code
notes combinations
inhabitants per square kilometre PD/km2 `PD` stands for population density, i.e. humans (inhabitants)
• PD/km2 PD/sqmi
per square kilometre /km2 Used when the word 'inhabitants' would be inappropriate.
• /km2 /sqmi
inhabitants per hectare PD/ha
• PD/ha PD/acre
per hectare /ha
• /ha /acre
inhabitants per square mile PD/sqmi `PD` stands for population density, i.e. humans (inhabitants)
• PD/sqmi PD/km2
per square mile /sqmi Used when the word 'inhabitants' would be inappropriate.
• /sqmi /km2
inhabitants per acre PD/acre
• PD/acre PD/ha
per acre /acre
• /acre /ha
COST PER UNIT MASS
unit unit-
code
notes combinations
dollars per pound \$/lb "\$" can mean US\$, HK\$, etc.
• (none)
dollars per kilogram \$/kg
• (none)
dollars per troy ounce \$/ozt 12 troy ounces in 1 troy pound
• (none)

### '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.

• `{}` → 1,000 kilograms per hectolitre (100 lb/imp gal)

Population density (inhabitants per square mile) can be converted using

• `{}` → 10 inhabitants per square mile (3.9/km2)

Vehicular fuel efficiency, commonly expressed in miles per gallon or litres per 100 km can also be converted

• `{}` → 26 miles per US gallon (9.0 l/100 km; 31 mpg‑imp)

### Units 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:

• `{{convert|10|C}}` → 10 °C (50 °F) (standard temperature conversion)
• `{{convert|10–15|C}}` → 10–15 °C (50–59 °F) (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 (`|C`, `|F` and `|K`), which refer to points on the respective scale. Instead, we must use one of the following "units of difference": `|C-change`, `|F-change` and `|K-change`.

Compare the following two examples with the two above:

• `{{convert|10|C-change}}` → 10 °C (18 °F) increase in temperature
• `{{convert|10–15|C-change}}` → 10–15 °C (18–27 °F) warmer than normal

To produce multiple units in the output:

• `{{convert|10|C-change|F-change K-change}}` → 10 °C (18 °F; 10 K) difference

### Multiple units: 1 ft 5 in

#### In input

Base document § Input multiples 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):

• `{}` → 1 yard 2 feet 3 inches (1.60 m)
• `{}` → 2 feet 3 inches (69 cm)
• `{}` → 1 pound 5 ounces (600 g)

#### In output

Available multiple-unit output options predefined, like `ftin` and `ydftin`. The full list is at § Output multiples.

• `{}` → 2 metres (6 ft 7 in)
• `{}` → 2 metres (6.6 ft; 79 in), using a space, returns the decimal point

Default behaviour, for comparison:

• `{}` → 2 metres (6 ft 7 in)

• {{hands}} a length used to measure horses
• {{Long ton}} 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:

• `{}` → \$10 per mile (\$6.2/km)
• `{}` → \$1,500 per troy ounce (\$48/g)

You can set the currency in both values using `|\$=€`:

• `{}` → €10 per mile (€6.2/km)

It is not possible to convert the currency. So, this result (mixed currencies) is not possible: \$15 per mile (€8.6/km) N

## Using convert inside templates

For usage in template code, like infoboxes, {{Convert}} has these options:

Pre-formatting fraction input
Your template can accept `|input=16 7/8` and use {{#invoke:Convert/helper|number|16 7/8}} → 16+7/8
Using a Wikidata property
• Adding the Wikidata property code, like code `|input=P2073`, 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 `|qid=`.

Example for vehicle range (P2073): Note: this example uses `|qid=Q1056131` (testing for Cessna 208 (Q1056131))

• `{}` → 1,500 mi (7,920,000 ft 0 in)
• `{}` → 1,500 mi (2,400 km)
• `{}` → 2,400 km
For example see template:Infobox Telescope.

Sometimes a property may have more than one value against in in Wikidata. You can use the `|qual=` parameter to specify which of the values you want to use.

Example for diameter (P2386): Note: this example uses `|qid=Q1513315` (testing for South Pole Telescope (Q1513315))

## Parameter list

Parameter options for {}
Parameter Value Description Note
`|abbr=in` `in` Use symbol for first (left-hand side) unit Unit display
`|abbr=off` `off` Use name for all units Unit display
`|abbr=none` `none`
`|abbr=on` `on` Use symbol for all units Unit display
`|abbr=out` `out` Use symbol for right-hand side unit (default) Unit display
`|abbr=unit` `unit` Use symbol for all units when using scientific notation Unit display
`|abbr=values` `values` Omit both the input and output units: show only the numbers Unit display
`|abbr=~` `~` Shows both unit name and symbol Unit display
`|adj=mid|…` `mid` User-specified text after the input unit; sets `adj=on` (adjective). Expects 1 unnamed parameter. Word adding, adjective
`|adj=on` `on` Unit name is adjective (singular and hyphenated) Grammar, adjective
`|adj=pre|…` `pre` User-specified text before input unit. Expects 1 unnamed parameter. Word adding
`|adj=ri0` `ri0` Round input with precision 0 Input precision
`|adj=ri1` `ri1` Round input with precision 1 Input precision
`|adj=ri2` `ri2` Round input with precision 2 Input precision
`|adj=ri3` `ri3` Round input with precision 3 Input precision
`|comma=5` `5` Only use comma for thousands separator if 5 or more digits Number format
`|comma=gaps` `gaps` Use gaps (space), not comma, for thousands separator Number format
`|comma=off` `off` No thousands separator Number format
`|disp=b` `b` Join input and output using " (...)" (default) Join values
`|disp=sqbr` `sqbr` Join input and output using " [...]" Join values
`|disp=br` `br` Join input and output using "<br/>" Join values
`|disp=comma` `comma` Join input and output using ", " Join values
`|disp=or` `or` Join input and output using " or " Join values
`|disp=number` `number` Display output number only Parts only
`|disp=output number only` `output number only`
`|disp=out` `out` Display only output number and name/symbol Parts only
`|disp=output only` `output only`
`|disp=preunit|…[|…]` `preunit` Text to be inserted after value and before units, for both input and output, with optionally different text for output. Expects 1 or 2 unnamed parameters. Word adding
`|disp=table` `table` Output is suitable for a table cell with align="right" Table columns
`|disp=tablecen` `tablecen` Output is suitable for a table cell with align="center" Table columns
`|disp=unit` `unit` Display input name/symbol only (not input number, not output) Parts only
`|disp=unit2` `unit2` Display output name/symbol only (not input; not output number) Parts only
`|disp=x|…` `x` Join input and output using user-specified text Word adding
`|frac=N` `N` Show imperial number in fractions, denominator=N Number format, fraction
`|input=P2048` `P2048` (e.g.) Reads and converts Wikidata property Inside template
`|lk=in` `in` Link left-hand side unit name or symbol Unit link
`|lk=on` `on` Link all unit names or symbols (but not twice for the same unit) Unit link
`|lk=out` `out` Link right-hand side unit name or symbol Unit link
`|order=flip` `flip` Inverts order of input, output measurements (conversion first) Order
`|order=out` `out` Displays output units in the order entered, skipping input unit Order
`|qid=Q1056131` `Q1056131` (e.g.) Reads Wikidata property from Wikidata item Inside template; testing
`|qual=Q613628` `Q613628` (e.g.) Qualify Wikidata property
`|round=5` `5` Rounds calculation to the nearest multiple of 5 Output precision
`|round=25` `25` Rounds calculation to the nearest multiple of 25 Output precision
`|round=each` `each` In a range, each number is rounded by the default rounding Output precision
`|sigfig=N` `N` Round output number to N significant figures (N is a positive integer) Output precision
`|sortable=on` `on` Adds invisible sort key Table sort
`|sp=us` `us` Use U.S. spelling ("meter" instead of default "metre") Spelling U.S. names
`|spell=in` `in` Spell input number in words Spelling numbers
`|spell=In` `In` Spell input number in words with first letter uppercase Spelling numbers
`|spell=on` `on` Spell input and output numbers in words Spelling numbers
`|spell=On` `On` Spell input and output numbers in words with first letter uppercase Spelling numbers
`|\$=€` `€` Replace \$-sign with a currency sign, for example in `\$/acre` (no currency conversion happens) Cost per unit
`|debug=yes` `yes` Debugging only. In a sortable table: show the normally hidden sort key Table sort
`|disp=flip` `flip` Deprecated. Use |order=flip Order
`|sing=` Deprecated. Use |adj= Plurals

## Deprecated options

This list:

Deprecated options should not be used. They may produce incorrect or undesired results and there is no guarantee that they will be supported in the future.

• disp=flip is deprecated. Use order=flip instead
• Range separator |xx| is deprecated (not MOS compliant). Use |x| instead
• Range separator |*| is deprecated (not MOS compliant). Use |x| instead

## TemplateData

This is the TemplateData documentation for this template used by VisualEditor and other tools; see the monthly error report for this template.

TemplateData for Convert

Converts measurements to other units.

Template parameters

This template prefers inline formatting of parameters.

ParameterDescriptionTypeStatus
Value`1`

The value to convert.

Numberrequired
From unit`2`

The unit for the provided value.

Example
km
Stringrequired
To units`3`

The units to convert into. Separate units by a space for multiple outputs. In an output unit, use + for a multiplication space.

Example
mi nmi
Stringsuggested
Precision or suffix`4`

Significant digits after decimal dot or, if negative, exponent of ten.

Numberoptional
Link units`lk`

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
Example
on
Stringoptional
Abbreviation`abbr`

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
Example
on, unit, in, out, off
Stringsuggested
Spelling`sp`

Spelling of units. Use “us” to display unit names using U.S. spelling.

Example
us
Stringoptional
Adjective`adj`

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.

Default
off
Example
on
Unbalanced wikitextoptional
Conversion`disp`

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.

Example
b
Stringdeprecated
Ordering`order`

“flip” returns converted value first, input value second.

Example
flip
Stringoptional
Significant figures`sigfig`

Indicates the number of significant figures to be used in rounding.

Numberoptional
Rounding output`round`

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.

Numberoptional
Thousands separator`comma`

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
Example
off
Stringoptional
Sort key`sortable`

“on” generates a hidden sort key

Example
on
Stringoptional
Spell numbers?`spell`

If used, spells input or input and output numbers in words, optionally capitalizing the first

Example
'in', 'In', 'on', or 'On'
Stringoptional
Singular?`sing`

If 'yes', uses singular form of units (deprecated)

Example
yes
Stringdeprecated
Fraction?`frac`

fraction as rounding unit

Numberoptional
Currency symbol`\$`

sets currency symbol in both units

Example
\$=€ will show " €10 per mile (€6.2/km)"
Stringoptional
WD property`input`

Reads the property value of the item (article), then converts it

Example
{} (P2046=area)
Stringoptional