Help:Convert/parameter options

This page may be incomplete or not up to date. Core overviews are Help:Convert and Template:Convert (documentation)

This page wants to give an elaborate overview of the {{convert}}} parameters and their options. It is a technical overview.

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

Units

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

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}} → 1,234 feet (380 m)
• {{convert|1234|ft|m|sigfig=4}} → 1,234 feet (376.1 m)
• {{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|order=flip|spell=in}} → eight kilometres (5 mi)
• {{convert|5|mi||0|order=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)

Fractions

An input value can be specified as a fraction.

• {{convert|1/2|in|mm|1}} → 1⁄2 inch (12.7 mm)
• {{convert|1/2|in|mm|1|adj=on}} → 1⁄2-inch (12.7 mm)
• {{convert|2+1/2|in|mm|1}} → 2+1⁄2 inches (63.5 mm)
• {{convert|-2-1/4|in|mm|1}} → −2+1⁄4 inches (−57.2 mm)
• {{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}} → 1/2 inch (12.7 mm)
• {{convert|2+1//2|in|mm|1}} → 2+1/2 inches (63.5 mm)

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}} → 219 mm (8+1⁄2 in)
• {{convert|219|mm|in|abbr=on|frac=4}} → 219 mm (8+1⁄2 in)
• {{convert|219|mm|in|abbr=on|frac=8}} → 219 mm (8+5⁄8 in)
• {{convert|222|mm|in|abbr=on|frac=8}} → 222 mm (8+3⁄4 in)

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}} → 18.45 inches (1⁄2 m)
• {{convert|18.45|in|ft in hand cm|frac=2}} → 18.45 inches (1+1⁄2 ft; 18+1⁄2 in; 4.2+1⁄2 hands; 46.9 cm)
• {{convert|18.45|in|ft in hand cm|frac=2|1}} → 18.45 inches (1.5 ft; 18.5 in; 4.2+1⁄2 hands; 46.9 cm)

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

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)
and(-)	{{convert|3|and(-)|6|ft}}	3 and 6 feet (0.91–1.83 m)	|abbr=on abbreviates the first unit
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 abbreviates the first unit
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)	|abbr=on abbreviates and repeats the first unit
× ×	{{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

The following ranges provide different output when units are abbreviated.

Convert	Output
{{convert|3|and(-)|6|ft|abbr=on}}	3 and 6 ft (0.91–1.83 m)
{{convert|3|to(-)|6|ft|abbr=on}}	3 to 6 ft (0.91–1.83 m)
{{convert|3|x|6|ft|abbr=on}}	3 ft × 6 ft (0.91 m × 1.83 m)

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}}	3 by 4 to 6+1⁄2 by 8+3⁄4 inches (76 mm × 102 mm to 165 mm × 222 mm)

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
{{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 ()
• {{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 convert

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

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

Wrapping and line breaking

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

Wrapping is possible where a space (" ") is used. Prevent wrapping is enforced by 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"

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

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

Within a measurement (value+unit)

The separator between the value 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 separator 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 value 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 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
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

Parameter list

Parameter options for {{convert}}
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 €/hectare	Cost per unit No currency conversion happens
|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

Examples of number grouping:

• {{convert|1234|m|ft}} → 1,234 metres (4,049 ft)
• {{convert|1234|m|ft|comma=5}} → 1234 metres (4049 ft)
• {{convert|12345|m|ft|comma=5}} → 12,345 metres (40,502 ft)
• {{convert|1234|m|ft|comma=gaps}} → 1234 metres (4049 ft)
• {{convert|1234|m|ft|comma=gaps5}} → 1,234 metres (4,049 ft)
• {{convert|1,234,567|m|ft|comma=gaps5}} → 1,234,567 metres (4,050,417 ft)
• {{convert|1,234,567|m|ft|comma=off}} → 1234567 metres (4050417 ft)

Examples of spelling input values:

• {{convert|10|mi|km|spell=in}} → ten miles (16 km)
• {{convert|10|mi|km|spell=In}} → Ten miles (16 km)
• {{convert|1/3|mi|km|adj=on|spell=in}} → one-third-mile (0.54 km)

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, should work with all units.
• Scaled units like e6USgal are not predefined. With some exceptions, all 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||adj=mid|-long}} (it is also possible to use {{convert|4|ft|0|adj=mid|-long}}, but that 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}}.

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 ()

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)