Help:Convert

Template {{convert}} is used to convert a value from one unit of measurement to another. This page provides an overview of the options available when using the template.

• Help:Convert units • Simplified list of some commonly used units
• Help:Convert messages • Error and warning messages

Asking questions

• Template talk:Convert • Questions on using the convert template, or discussion of any problems encountered
• Wikipedia:Help desk • General questions
• Module talk:Convert • Discussion concerning the convert modules

Units

• Help:Convert units • Simplified list of some commonly used units
• Module:Convert/documentation/conversion data/doc • Full list of units

Quick start

By default, the name of the input unit is shown, while the output is abbreviated using the unit's symbol. If wanted, names or symbols can be used, and the output precision can be specified.

• {{convert|123.4|ft|m}} → 123.4 feet (37.6 m)
• {{convert|123.4|ft|m|abbr=on}} → 123.4 ft (37.6 m)
• {{convert|123.4|ft|m|abbr=off}} → 123.4 feet (37.6 metres)
• {{convert|123.4|ft|m|abbr=off|sp=us}} → 123.4 feet (37.6 meters)
• {{convert|123.4|ft|m|0}} → 123.4 feet (38 m)
• {{convert|123.4|ft|m|3}} → 123.4 feet (37.612 m)

To avoid overlinking, units are not normally linked, but they can be when needed.

• {{convert|12300|m2|rood|abbr=off|lk=on}} → 12,300 square metres (12.2 roods)
• {{convert|12300|m2|rood|abbr=off|lk=out}} → 12,300 square metres (12.2 roods)

A convert can be used in an adjectival phrase, and user-specified text can be inserted.

• {{convert|1500|ft|m|adj=on}} → 1,500-foot (460 m)
• {{convert|1500|ft|m|adj=mid|-long}} → 1,500-foot-long (460 m)

If no output unit is specified, a default is used.

• {{convert|123.4|ft}} → 123.4 feet (37.6 m)
• {{convert|123.4|ft|abbr=on}} → 123.4 ft (37.6 m)
• {{convert|1500|ft||adj=mid|-long}} → 1,500-foot-long (460 m)

The last example used || to explicitly show that the output unit has been omitted. If that is not done, the result is an error, and holding the mouse over the error message shows that "-long" is misinterpreted as the output unit.

• {{convert|1500|ft|adj=mid|-long}} → 1,500-foot (%s)

The input and outputs can be "flipped". When flipped, an option such as |lk=out means "link the right-hand side".

• {{convert|12300|m2|rood|abbr=off|lk=out}} → 12,300 square metres (12.2 roods)
• {{convert|12300|m2|rood|abbr=off|lk=out|disp=flip}} → 12.2 roods (12,300 square metres)
• {{convert|12300|m2|rood|abbr=off|lk=in|disp=flip}} → 12.2 roods (12,300 square metres)

The input value can be spelled.

• {{convert|5|mi|km|spell=in|0}} → five miles (8 km)
• {{convert|5|mi|km|spell=In|0}} → Five miles (8 km)

Ranges of values are supported.

• {{convert|3|-|6|ft}} → 3–6 feet (0.91–1.83 m)
• {{convert|3|to|6|ft|abbr=off|sp=us}} → 3 to 6 feet (0.91 to 1.83 meters)

A range can use more than two values.

• {{convert|100|x|120|x|210|mm|in}} → 100 by 120 by 210 millimetres (3.9 in × 4.7 in × 8.3 in)
• {{convert|100|x|120|x|210|mm|in|abbr=on}} → 100 mm × 120 mm × 210 mm (3.9 in × 4.7 in × 8.3 in)
• {{convert|100|by|120|by|210|mm|in}} → 100 by 120 by 210 millimetres (3.9 by 4.7 by 8.3 in)

Some input units consist of multiple components.

• {{convert|5|ft|8|in}} → 5 feet 8 inches (1.73 m)
• {{convert|11|st|3|lb|kg}} → 11 stone 3 pounds (71 kg)

An output can be a combination of several units.

• {{convert|123|nmi|km mi}} → 123 nautical miles (228 km; 142 mi)
• {{convert|123|hPa|psi inHg|abbr=on|lk=on}} → 123 hPa (1.78 psi; 3.6 inHg)

Some outputs consist of multiple units.

• {{convert|123.4|m|ydftin}} → 123.4 metres (134 yd 2 ft 10 in)
• {{convert|123.4|kg|stlb}} → 123.4 kilograms (19 st 6 lb)

Rounding

By default, the output value is rounded to adjust its precision to match that of the input. An input such as 1234 is interpreted as 1234 ± 0.5, while 1200 is interpreted as 1200 ± 50, and the output value is displayed accordingly, taking into account the scale factor used in the conversion.

If the default is not wanted, the precision of output values can be specified using:

• |N (where N is a number) to specify the number of digits to be displayed after the decimal mark (round output to N decimal places).
• |-N (where -N is a negative number) to specify the number of digits before the decimal mark that should be replaced with zero (round output to nearest 10^N).
• |sigfig=N (where N is a positive number) to specify the number of significant digits (round output to N significant figures).
• |round=5 to round the output to the nearest multiple of 5.

Examples:

• {{convert|1234|ft|m}} → 1,234 feet (376 m)
• {{convert|1234|ft|m|2}} → 1,234 feet (376.12 m)
• {{convert|1234|ft|m|-1}} → 1,234 feet (380 m)
• {{convert|1234|ft|m|round=5}} → 1,234 feet (375 m)
• {{convert|1234|ft|m|sigfig=2}} →
• {{convert|1234|ft|m|sigfig=4}} →
• {{convert|1230|ft|m}} → 1,230 feet (370 m)
• {{convert|1230|ft|m|0}} → 1,230 feet (375 m)
• {{convert|1230|ft|m|1}} → 1,230 feet (374.9 m)
• {{convert|5670|sqft}} → 5,670 square feet (527 m²)
• {{convert|5670|sqft|-2}} → 5,670 square feet (500 m²)

Spell

Use US (en-US) spelling for unit names

Use |sp=us to specify that unit names should be displayed with US spelling:

• {{convert|6|km}} → 6 kilometres (3.7 mi)
• {{convert|6|km|sp=us}} → 6 kilometers (3.7 mi)

Spell out numbers in words

Use |spell=in to specify that the input value should be spelled in words, or |spell=In (uppercase "I") to start with an uppercase letter:

• {{convert|5|mi|km|spell=in}} → five miles (8.0 km)
• {{convert|5|mi|km|spell=in|abbr=off|0}} → five miles (8 kilometres)
• {{convert|5|mi|km|spell=In|0}} → Five miles (8 km)
• {{convert|5|mi|km|spell=In|abbr=off|0}} → Five miles (8 kilometres)
• {{convert|2+1/4|mi|km|abbr=off|0|spell=In}} → Two and a quarter miles (4 kilometres)
• {{convert|2+1/4|mi|km|abbr=off|0|spell=In|sp=us}} → Two and a fourth miles (4 kilometers)

The input and output can be "flipped", as shown in these examples. Logically, the resulting first number is spelled:

• {{convert|5|mi||0|disp=flip|spell=in}} → eight kilometres (5 mi)
• {{convert|5|mi||0|disp=flip|spell=In|abbr=off}} → Eight kilometres (5 miles)

The "||" provides an empty output unit to mean "use the default".

Both input and output values can be spelled:

• {{convert|5|mi|m|-2|spell=on|sp=us|abbr=off}} → five miles (eight thousand meters)
• {{convert|5|mi|m|-2|spell=On|sp=us|abbr=off}} → Five miles (eight thousand meters)

Thousands separator

In input, a comma for thousands separator is accepted. In output, by default, the thousands separator is the comma:

• {{convert|1234567|m|ft}} → 1,234,567 metres (4,050,417 ft)
• {{convert|1,234,567|m|ft}} → 1,234,567 metres (4,050,417 ft)

Set |comma=off to remove any thousands separator in the result:

• {{convert|1,234,567|m|ft|comma=off}} → 1234567 metres (4050417 ft)%s

Use |comma=gaps to set thousands grouping by gap (<space>):

• {{convert|1234567|m|ft}} → 1,234,567 metres (4,050,417 ft) (To compare, default)
• {{convert|1234567|m|ft|comma=gaps}} → 1234567 metres (4050417 ft)

Setting |comma=5 or |comma=gaps5 will add the separator only when the number of digits is 5 or more:

• {{convert|1234|m|ft}} → 1,234 metres (4,049 ft) (To compare, default)
• {{convert|1234|m|ft|comma=5}} → 1234 metres (4049 ft)
• {{convert|1234567|m|ft|comma=5}} → 1,234,567 metres (4,050,417 ft)
• {{convert|1234|m|ft|comma=gaps5}} → 1234 metres (4049 ft)%s
• {{convert|1234567|m|ft|comma=gaps5}} → 1234567 metres (4050417 ft)%s

Gaps are not allowed in input.

Fractions

An input value can be specified as a fraction.

• {{convert|1/2|in|mm|1}} →
• {{convert|1/2|in|mm|1|adj=on}} →
• {{convert|2+1/2|in|mm|1}} →
• {{convert|-2-1/4|in|mm|1}} →
• {{convert|1/2|in|mm|1|spell=in}} → one-half inch (12.7 mm)

If two slashes are used, a horizontal fraction bar is used.

• {{convert|1//2|in|mm|1}} →
• {{convert|2+1//2|in|mm|1}} →

An output can be expressed with a fraction using |frac=N where N is the denominator. For example, |frac=8 rounds the output to the nearest eighth.

• {{convert|219|mm|in|abbr=on}} → 219 mm (8.6 in)
• {{convert|219|mm|in|abbr=on|frac=2}} →
• {{convert|219|mm|in|abbr=on|frac=4}} →
• {{convert|219|mm|in|abbr=on|frac=8}} →
• {{convert|222|mm|in|abbr=on|frac=8}} →

A fraction is applied to the output unit (if there is only one), or to non-SI units (if using a combination), except that if a precision is also specified, the fraction only applies to the hand unit.

• {{convert|18.45|in|m|frac=2}} →
• {{convert|18.45|in|ft in hand cm|frac=2}} →
• {{convert|18.45|in|ft in hand cm|frac=2|1}} →

Joins

The |disp= ("display") option may be used to "join" the input and output, as shown in the following examples.

Convert	Output	Description
{{convert|2.4|m|ft}}	2.4 metres (7.9 ft)	default
{{convert|2.4|m|ft|disp=b}}	2.4 metres (7.9 ft)	brackets (same as default)
{{convert|2.4|m|ft|disp=sqbr}}	2.4 metres [7.9 ft]	square brackets
{{convert|2.4|m|ft|disp=or}}	2.4 metres or 7.9 feet	or
{{convert|2.4|m|ft|disp=comma}}	2.4 metres, 7.9 ft	comma
{{convert|2.4|m|ft|disp=br}}	2.4 metres 7.9 feet	"<br />", line break

Ranges

A range of values can be specified, as shown in the following examples.

Range separators in {{convert}}
Separator	Convert	Result	Notes
-	{{convert|3|-|6|ft}}	3–6 feet (0.91–1.83 m)	Input can be hyphen (-) or en dash (–), output uses en dash
– –(en dash)	{{convert|3|–|6|ft}}	3–6 feet (0.91–1.83 m)
and	{{convert|3|and|6|ft}}	3 and 6 feet (0.91 and 1.83 m)
&	{{convert|3|&|6|ft}}	3 and 6 feet (0.91 and 1.83 m)	Same as and
and(-)	{{convert|3|and(-)|6|ft}}	3 and 6 feet (0.91–1.83 m)	|abbr=on alters the punctuation(how?)
and(-)|abbr=on	{{convert|3|and(-)|6|ft|abbr=on}}	3 and 6 ft (0.91–1.83 m)
or	{{convert|3|or|6|ft}}	3 or 6 feet (0.91 or 1.83 m)
to	{{convert|3|to|6|ft}}	3 to 6 feet (0.91 to 1.83 m)
to(-)	{{convert|3|to(-)|6|ft}}	3 to 6 feet (0.91–1.83 m)	|abbr=on alters the punctuation(how?)
to(-)|abbr=on	{{convert|3|to(-)|6|ft|abbr=on}}	3 to 6 ft (0.91–1.83 m)
to about	{{convert|3|to about|6|ft}}	3 to about 6 feet (0.91 to about 1.83 m)
+/-	{{convert|3|+/-|6|ft}}	3 ± 6 feet (0.91 ± 1.83 m)
± ±	{{convert|3|±|6|ft}}	3 ± 6 feet (0.91 ± 1.83 m)
+	{{convert|3|+|6|ft}}	3 + 6 feet (0.91 + 1.83 m)
,	{{convert|3|,|6|ft}}	3, 6 feet (0.91, 1.83 m)
, and	{{convert|3|, and|6|ft}}	3, and 6 feet (0.91, and 1.83 m)
, or	{{convert|3|, or|6|ft}}	3, or 6 feet (0.91, or 1.83 m)
by	{{convert|3|by|6|ft}}	3 by 6 feet (0.91 by 1.83 m)
x	{{convert|3|x|6|ft}}	3 by 6 feet (0.91 m × 1.83 m)	Scientific notation. |abbr=on alters the punctuation
× ×	{{convert|3|×|6|ft}}	3 by 6 feet (0.91 m × 1.83 m)
x|abbr=on	{{convert|3|x|6|ft|abbr=on}}	3 ft × 6 ft (0.91 m × 1.83 m)
xx	|xx| is deprecated. Use |x| instead
*	|*| is deprecated. Use |x| instead
to-	|to-| is deprecated. Use |to(-)| instead
&	|&| is deprecated. Use |and| instead
abbr=mos	|abbr=mos is deprecated. Use |x| or |by| instead

Ranges can use more than two values.

Convert	Output
{{convert|3|x|4|x|24|in}}	3 by 4 by 24 inches (76 mm × 102 mm × 610 mm)
{{convert|3|x|4|to|6+1/2|x|8+3/4|in}}

Ranges can be specified in the first parameter.

Convert	Output
{{convert|3.2-7.5|ha}}	3.2–7.5 hectares (7.9–18.5 acres)
{{convert|3x4x24|in}}	3 by 4 by 24 inches (76 mm × 102 mm × 610 mm)

Extra words

Some options provide text that is included in the output, as shown in the following examples.

Convert	Output	Description
{{convert|4|ft||adj=mid|-long}}	4-foot-long (1.2 m)	Adjectival with mid-text between input and output (sets |adj=on)
{{convert|40|acre||adj=pre|planted}}	40 planted acres (16 ha)	Text before the input unit
{{convert|4|m||disp=preunit|+ }}	4+ metres (13+ ft)	Same text before the input and output units
{{convert|4|m||disp=preunit|+ |or more }}	4+ metres (13 or more ft)	Different text before the input and output units
{{convert|20|impfloz||disp=x|, approximately }}	20 imperial fluid ounces, approximately 570 ml; 19 US fl oz	Text before the output (replaces the join)
{{convert|100|m||disp=x|/day (|/day)}}	100 metres/day (330 ft/day)	Text before and after the output (replaces the join)

In each of the above examples, "||" provides an empty output unit which causes the default output to be used. An output unit, possibly empty, must be specified to avoid the template interpreting the extra text as the output unit. For example, using {{convert|4|ft|adj=mid|-long}} has the same effect as using {{convert|4|ft|-long|adj=mid}}, namely that an error would occur because "-long" would be used as the output unit. The following illustrates the error (hover the mouse over the error text to see that the problem is due to "-long" ) and how it may be avoided.

• {{convert|4|ft|adj=mid|-long}} → 4-foot (%s)
• {{convert|4|ft||adj=mid|-long}} → 4-foot-long (1.2 m)
• {{convert|4|ft| |adj=mid|-long}} → 4-foot-long (1.2 m)
• {{convert|4|ft|m|adj=mid|-long}} → 4-foot-long (1.2 m)

Displaying parts of a conversion

The following examples show how to display only a part of the output.

Convert	Output	Description
{{convert|2|cuyd|m3}}	2 cubic yards (1.5 m3)	normal convert
{{convert|2|cuyd|m3|abbr=values}}	2 (1.5)	input and output values
{{convert|2|cuyd|m3|disp=unit}}	cubic yards	input unit
{{convert|2|cuyd|m3|disp=unit|adj=on}}	cubic-yard	input unit, adjectival (hyphenated)
{{convert|2|cuyd|cuyd|0|disp=out|abbr=off}}	2 cubic yards	input (workaround)
{{convert|2|cuyd|m3|disp=unit2}}	m3	output unit (symbol)
{{convert|2|cuyd|m3|disp=unit2|abbr=off}}	cubic metres	output unit (name)
{{convert|2|cuyd|m3|disp=number}}	1.5	output value
{{convert|2|cuyd|m3|disp=out}}	1.5 m3	output value and unit
{{convert|2|cuyd|m3|abbr=off|disp=out}}	1.5 cubic metres	output value and unit

Flipping the order of output

To invert the order of measurements, simply use |order=flip

• {{convert|10|km|mi}} → 10 kilometres (6.2 mi) (default)
• {{convert|10|km|mi|order=flip}} → 6.2 miles (10 km)

Wrapping and line breaking

Convert uses the regular space (" ") and non-breaking space (  which shows: " ") to control line-breaking (also called wrapping/nowrapping).

In all examples below, an   is shown as "_" (red underscore): "3_ft".

Wrapping is possible where a regular space (" ") is used. Prevent wrapping is enforced in the template using the non-breaking space, that ties and keeps text elements together.

3 feet may break after "3"

3 ft, or 3_ft, will not break after "3"

A line break (<br/>) forces a newline (line break), and so overrules any nowrap setting at that point.

Word meaning:

In measurements, SI uses wording that says that value = number × unit, for example length = number × meter.

In {{Convert}} documentation, sometimes 'value' is uses to mean the number; and abbr is used to mean unit symbol(s).

Within a single measured value (number and unit)

The separator between the number and the unit can be a space or a nonbreaking space ( ):

• When a unit is abbreviated (symbol is shown), the separator is  .

{{convert|12|m|ft|abbr=on}} → 12_m (39_ft)

• When a unit is not abbreviated (name is shown), the separator is a space.

{{convert|12|m|ft}} → 12 metres (39_ft)

This can be set (overruled) to be   by |adj=j (for 'join').

{{convert|12|m|ft|adj=j}} → 12_metres (39_ft)

• Some units do not have a symbol and always use a space (such as acre).

{{convert|3|acre|m2|abbr=on}} → 3 acres (12,000_m²)

• Except, option |adj=j ("join") forces the number-unit separator (space) to be  .

{{convert|3|acre|m2|adj=j}} → 3_acres (12,000_m²)

• Except,   is always used when a measurement is in multiple units.

{{convert|1|ft|6|in|cm}} → 1_foot 6_inches (46_cm)

{{convert|2|m|ftin}} → 2 metres (6_ft 7_in)

• Except, if option |adj=on is used and the unit is not abbreviated, the separator is a hyphen ("-").

{{convert|2|m|ftin|adj=on}} → 2-metre (6_ft 7_in)

• When the name of a number is used,   is used as the separator between the number and the name. For example, a measurement spelled as "12 million metres" has   before "million" and a space afterwards.

{{convert|12|e6m}} → 12_million metres (39,000,000_ft)

Between measurements

• A space is used as the separator in a join between the first and second measurement.

{{convert|3|ft|m}} → 3 feet (0.91_m)

• Except for the special case before "[" :

{{convert|12|in|cm|disp=sqbr|abbr=on}} → 12_in_[30_cm] (  before "[")

• Multiple output measurements (by listing units) always use a space between measurements ("; " has a space after ";").

{{convert|2|acre|m2 sqft ha}} → 2 acres (8,100_m²; 87,000_sq_ft; 0.81_ha)

Between components of a measurement (e.g., in a range; between foot–inch)

• A measurement in multiple units always uses a space between components ("1 foot 6 inches" has   before the unit names, but a space after "foot").

{{convert|1|ft|6|in|cm}} → 1_foot 6_inches (46_cm)

• In a range, spaces are generally used to separate items. For example, "to" and "or" have a space before and after in the following.

{{convert|12|to|20|in|cm}} → 12 to 20 inches (30 to 51_cm)

{{convert|12|or|20|in|cm}} → 12 or 20 inches (30 or 51_cm)

• The ranges +/- and , always use  :

{{convert|12|+/-|2|in|cm}} → 12_±_2 inches (30.5_±_5.1_cm)

{{convert|12|,|20|in|cm}} → 12,_20 inches (30,_51_cm)

• The "to-" range (same as "to(-)") is an exception. When a unit is not abbreviated, "to" has   before and a space after.

{{convert|12|to-|20|in|cm}} → 12_to 20 inches (30–51_cm)

• The "x" range is an exception. When a unit is abbreviated, "×" has a space before and   after.

{{convert|12|x|20|in|cm}} → 12 by 20 inches (30_cm ×_51_cm)

Overrule by setting a line break

• Parameter |disp=br adds a forced line break (<br/>) between measurements; brackets are omitted.

{{convert|12|m|ft|disp=br}} → 12 metres<br/>39 feet shows:

12 metres
39 feet

Preview wikicode

To see the wikicode result of the convert template: put your {{convert|...}} code into Special:ExpandTemplates and then preview by clicking OK.

Tables

The following parameters are intended for use in tables.

Parameter	Description
|disp=table	for a table cell with align="right"
|disp=tablecen	for a table cell with align="center"
|sortable=on	output a numeric hidden sort field for a sortable table

The following shows the wikitext output by some example converts.

Convert	Resulting wikitext
{{convert|47.5|kg|lb}}	47.5 kilograms (105 lb)
{{convert|47.5|kg|lb|disp=table}}	align="right"|47.5 |align="right"|105
{{convert|47.5|kg|lb|disp=tablecen}}	align="center"|47.5 |align="center"|105
{{convert|47.5|kg|lb|sortable=on}}	<span style="display:none">7001475000000000000</span>47.5 kilograms (105 lb)

Fixed table

This wikitext:

{|class="wikitable"
! align=right, rowspan="2" |
!colspan="2"| Length
!colspan="2"| Weight
|- style="vertical-align:bottom;"
!metres !!ft in !!kg !!lb
|-
! Lorem ipsum
| {{convert|28.1|m|ftin|disp=table}}
| {{convert|47.5|kg|lb|disp=table}}
|-
! Dolor sit amet
| {{convert|9.9|m|ftin|disp=table}}
| {{convert|74.1|kg|lb|disp=table}}
|-
! Consectetur
| {{convert|38.2|m|ftin|disp=table}}
| {{convert|31.5|kg|lb|disp=table}}
|-
! Adipisicing elit
| {{convert|18.7|m|ftin|disp=table}}
| {{convert|52.7|kg|lb|disp=table}}
|}

produces this table:

	Length		Weight
	metres	ft in	kg	lb
Lorem ipsum	28.1	92 ft 2 in	47.5	105
Dolor sit amet	9.9	32 ft 6 in	74.1	163
Consectetur	38.2	125 ft 4 in	31.5	69
Adipisicing elit	18.7	61 ft 4 in	52.7	116

Sortable table

This wikitext:

{|class="wikitable sortable"
! align=right, rowspan="2" |
!colspan="2"| Length
!colspan="2"| Weight
|- style="vertical-align:bottom;"
!metres !!ft in !!kg !!lb
|-
! Lorem ipsum
| {{convert|28.1|m|ftin|disp=table|sortable=on}}
| {{convert|47.5|kg|lb|disp=table|sortable=on}}
|-
! Dolor sit amet
| {{convert|9.9|m|ftin|disp=table|sortable=on}}
| {{convert|74.1|kg|lb|disp=table|sortable=on}}
|-
! Consectetur
| {{convert|38.2|m|ftin|disp=table|sortable=on}}
| {{convert|31.5|kg|lb|disp=table|sortable=on}}
|-
! Adipisicing elit
| {{convert|18.7|m|ftin|disp=table|sortable=on}}
| {{convert|52.7|kg|lb|disp=table|sortable=on}}
|}

produces this table:

	Length		Weight
	metres	ft in	kg	lb
Lorem ipsum	28.1	92 ft 2 in	47.5	105
Dolor sit amet	9.9	32 ft 6 in	74.1	163
Consectetur	38.2	125 ft 4 in	31.5	69
Adipisicing elit	18.7	61 ft 4 in	52.7	116

Units in singular or plural

Unit symbols are always singular. Unit names can be singular or plural. A unit is singular when the number is exactly +1:

• {{convert|0.5|ft|m|abbr=off}} → 0.5 feet (0.15 metres)
• {{convert|1|ft|m|abbr=off}} → 1 foot (0.30 metres)
• {{convert|2|ft|m|abbr=off}} → 2 feet (0.61 metres)

Note: as of November 2014, in certain conditions this topic can behave unexpected (bug).

Setting |adj=1 makes these values singular: (−1 <= v and v < 0) or (0 < v and v <= 1)

• {{convert|2|ft|m|adj=1|abbr=off}} → 2 feet (0.61 metre)
• {{convert|1|ft|m|adj=1|abbr=off}} → 1 foot (0.30 metre)
• {{convert|0.5|ft|m|adj=1|abbr=off}} → 0.5 foot (0.15 metre)
• {{convert|0|ft|m|adj=1|abbr=off}} → 0 feet (0 metres)
• {{convert|-0.5|ft|m|adj=1|abbr=off}} → −0.5 foot (−0.15 metre)
• {{convert|-1|ft|m|adj=1|abbr=off}} → −1 foot (−0.30 metre)
• {{convert|-2|ft|m|adj=1|abbr=off}} → −2 feet (−0.61 metre)

Parameter list

Parameter options for {{convert}}
Option	=..	Description	Note
|abbr=in		Use symbol for first (left-hand side) unit	Symbol ('abbreviation')
|abbr=off		Use name for all units	Symbol ('abbreviation')
|abbr=none
|abbr=on		Use symbol for all units	Symbol ('abbreviation')
|abbr=out		Use symbol for right-hand side unit (default)	Symbol ('abbreviation')
|abbr=values		Show only input and output numbers, not units	Parts only
|abbr=~		Shows both unit name and symbol	Symbol & name
|adj=j		Join number and unit name using " " instead of a space	Join values
|adj=mid|x=...		User-specified text after the input unit; sets adj=on (adjective)	Word adding, adjective
|adj=on		Unit name is adjective (singular and hyphenated)	Grammar, adjective
|adj=pre|x=...		User-specified text before input unit	Word adding
|adj=ri0		Round input with precision 0	Rounding and sigfig
|adj=ri1		Round input with precision 1	Rounding and sigfig
|adj=ri2		Round input with precision 2	Rounding and sigfig
|adj=ri3		Round input with precision 3	Rounding and sigfig
|disp=b		Join input and output using " (...)" (default)	Join values
|disp=sqbr		Join input and output using " [...]"	Join values
|disp=br		Join input and output using "<br/>"	Join values
|disp=comma		Join input and output using ", "	Join values
|disp=or		Join input and output using " or "	Join values
|disp=number		Display output number only	Parts only
|disp=output number only
|disp=out		Display only output number and name/symbol	Parts only
|disp=output only
|disp=preunit|x=...		User-specified text before input and output units	Word adding
|disp=table		Output is suitable for a table cell with align="right"	Table columns
|disp=tablecen		Output is suitable for a table cell with align="center"	Table columns
|disp=unit		Display input name/symbol only ( not input number, not output)	Parts only
|disp=unit2		Display output name/symbol only (not input; not output number)	Parts only
|disp=x|...		Join input and output using user-specified text	Word adding
|comma=5		Only use comma for thousands separator if 5 or more digits	Number format
|comma=gaps		Use gaps (space), not comma, for thousands separator	Number format
|comma=gaps5		Use gaps (space), but only if 5 or more digits	Number format
|comma=off		No thousands separator	Number format
|frac=N		Show imperial number in fractions, denominator=N	Number format, fraction
|lk=in		Link left-hand side unit name or symbol	Unit link
|lk=on		Link all unit names or symbols (but not twice for the same unit)	Unit link
|lk=out		Link right-hand side unit name or symbol	Unit link
|order=flip		Inverts order of input, output measurements (conversion first)	Order
|round=5		Rounds calculation to the nearest multiple of 5	Rounding and sigfig
|round=25		Rounds calculation to the nearest multiple of 25	Rounding and sigfig
|round=each		In a range, each number is rounded by the default rounding	Rounding and sigfig
|sigfig=N		Round output number to N significant figures (N is a positive integer)	Rounding and sigfig
|sortable=in		Output numeric hidden sort field for use in a sortable table (based on input)	Table sort
|sortable=on
|sortable=out		Output numeric hidden sort field for use in a sortable table (based on output)	Table sort
|sp=us		Use U.S. spelling (like "meter" instead of default "metre")	Spelling U.S. names
|spell=in		Spell input number in words	Spelling numbers
|spell=In		Spell input number in words with first letter uppercase	Spelling numbers
|spell=on		Spell input and output numbers in words	Spelling numbers
|spell=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		Debugging only. In a sortable table: show the normally hidden sort key	Table sort
|abbr=comma		Deprecated. Use |comma=off	Number format
|abbr=mos		Deprecated. Use |x| or |by|	Range format
|adj=1		Deprecated. Do not use. No need to deviate from MOS regarding plurals	Plural or singular
|adj=flip		Deprecated. Use |order=flip	Order
|adj=nocomma		Deprecated. Use |comma=off	Number format
|disp=2		Deprecated. Use |disp=output only	Parts only
|disp=5		Deprecated. Use |round=5	Rounding and sigfig
|disp=flip		Deprecated. Use |order=flip	Order
|disp=flip5		Deprecated. Use |order=flip |round=5	Order, rounding
|disp=nocomma		Deprecated. Use |comma=off	Number format
|disp=u2		Deprecated. Use |disp=unit2	Parts only
|near=5		Deprecated. Use |round=5	Rounding and sigfig

Complicated grammar

This example is from article Fort McHenry:

The American defenders had 18-, 24- and 32-pounder (8, 11 and 15 kg) cannons.

This result is not possible straightforward by using {{convert}}. However, it can be made in three steps. Short: step 1: get the values right using {{convert}}, step 2: make them into hardcoded text, step 3: edit text into correct spelling and grammar. Long:

Step 1: Enter the input numbers and units in {{convert}} just to get the calculated output:

• had {{convert|18|,|24|,|32|lb|kg|0}} cannons

→ had 18, 24, 32 pounds (8, 11, 15 kg) cannons

The core conversion should look good now. You can save this (or preview).

Step 2: We need the resulting text in plain code in the page, not as a {{convert|...}} template.

For this, add subst: to the template name (for 'substitute') :

• had {{subst:convert|18|,|24|,|32|lb|kg|0}} cannons

As a check: the preview result should show the conversion correct, with the values still right. Now save this.

→ had 18, 24, 32 pounds (8, 11, 15 kg) cannons

Step 3: When opening the edit screen again, you'll see that the text is there in code.

You can change the text as needed. The template {{convert|...}} itself has disappeared. The edit screen text is:

had 18, 24, 32 pounds (8, 11, 15 kg) cannons

You can edit this text to add the grammar:

• had 18-,_24-_and_32-pounder (8, 11_and_15 kg) cannons

After saving your edit, it shows:

→ "had 18-, 24- and 32-pounder (8, 11 and 15 kg) cannons".

• Other options are (all replacing step 2 in the above):

B. Save the primary {{convert}} conversion, and then copy-paste the values from the plain read page into edit-page.

C. Put the {{convert|...}} code in Special:ExpandTemplates, and paste the result from there into the edit screen.

Differences from templates previously used

Before December 2013, {{convert}} was implemented by a series of templates, not a module. Following are some differences between the new and old convert implementations.

• Using {{subst:convert|...}} works with the module.
• The module checks unit types and displays an error message if a mismatch occurs.
• Ranges and all options, including order=flip, work with all units.
• Scaled units like e6USgal are not predefined. With some exceptions, all standard (simple) units accept prefixes e3, e6, e9, e12, e15.
• The module uses an empty unit code rather than 0 to mean "use the default unit", as in {{convert|4|ft||abbr=on}}

Note that writing {{convert|4|ft|0|abbr=on}} sets the output precision to zero.

• The functionality of {{convert/3}} and {{convert/4}} is handled by the module, except that the module does not support arbitrary text to separate items in a range. Furthermore, the predefined separator words such as "by" and "to" behave in exactly the same manner as they do for standard converts, so a conversion like {{convert/3|2|x|4|x|6|m|ft}} would need to use the new * separator rather than x to produce exactly the same output with the module.
• The module does not have a problem with template loops, and will allow pointless conversions like {{convert|123|m|m}}.

Deprecated

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.

• abbr=comma is deprecated. Use comma=off instead
• abbr=mos, setting range separators, is deprecated (not MOS compliant). Use |by| or |x| instead
• adj=1 is deprecated. No need to deviate from MOS regarding plurals
• adj=flip is deprecated. Use order=flip instead
• adj=nocomma is deprecated. Use comma=off instead
• disp=2 is deprecated. Use disp=output only instead
• disp=5 is deprecated. Use round=5 instead
• disp=flip is deprecated. Use order=flip instead
• disp=flip5 is deprecated. Use |order=flip |round=5 instead
• disp=nocomma is deprecated. Use comma=off instead
• disp=slash, disp=s, disp=/ are deprecated. Use disp=or instead
• disp=u2 is deprecated. Use disp=unit2 instead
• near=5 is deprecated. Use round=5 instead
• sing= is deprecated in any situation. Use adj= instead
• Range separator |xx| is deprecated (not MOS compliant). Use |x| instead
• Range separator |*| is deprecated (not MOS compliant). Use |x| instead
• Range separator |&| is deprecated. Use |and| instead
• Range separator |to-| is deprecated. Use |to(-)| instead

Limitations

This is a list of features that the module may be expected to support, but which will not work.

Composite units cannot be used in a range:

• {{convert|2|ft|6|in|to|3|ft|9|in}} → 2 feet 6 inches (%s)%s

If an expression is wanted, it has to use {{#expr:...}}:

• {{convert|3*12|ft|mm}} → 3×12 feet (910×3,660 mm)
• {{convert|{{#expr:3*12}}|ft|mm}} → 36 feet (11,000 mm)