Units of measurement usage on Wikivoyage
[edit]
To ensure units are displayed correctly, the simplified individual template should be used.
The Convert template can be used in cases where standard format is not optimum.
Simplified unit of measurement templates
[edit]- {{km}} , {{mi}}
- {{m}} , {{ft}}, {{yd}}
- {{mm}} , {{in}}
- {{ha}} , {{acre}}
- {{km2}} , {{mi2}}
- {{m2}} , {{ft2}}
- {{kmh}} , {{mph}}
- {{kg}} , {{lb}}
- {{g}} , {{oz}}
- {{C}} , {{F}}
Convert template usage
[edit]Template {{convert}} calculates measurements from one unit (you can enter) to another one, and then presents the results. For example:
{{convert|2|km|mi}}→ 2 kilometres (1.2 mi){{convert|7|mi|km}}→ 7 miles (11 km)
Multiple formatting and calculation options are listed below.
Unit name or symbol (abbreviation): 1 pound or 1 lb?
[edit]By default, the first value shows unit name, the second the symbols (= abbreviation).
Use |abbr=on/off to change this behaviour:
{{convert|1|lb|kg}}→ 1 pound (0.45 kg) (To compare; default: first value shows unit name){{convert|1|lb|kg|abbr=on}}→ 1 lb (0.45 kg){{convert|1|lb|kg|abbr=off}}→ 1 pound (0.45 kilograms)
|abbr=intoggles the default behaviour (|abbr=out):
{{convert|1|lb|kg|abbr=in}}→ 1 lb (0.45 kilograms)
Adjective: a 10-mile distance
[edit]Use |adj=on to produce the adjective form. The difference:
{{convert|10|mi|km}} to go→ 10 miles (16 km) to go. (To compare, default)A {{convert|10|mi|km|adj=on}} distance→ A 10-mile (16 km) distance. (Adjective form)
Rounding: 100 ft is 30 m or 30.5 m or 30.48 m?
[edit]In detail, it is 100 feet (30,480 mm)*. In practical use, it is common to round the calculated metric number. With that, there are several possibilities.
Default rounding
[edit]- By 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 figures, whichever is more precise. An exception to this is rounding temperatures (see below).
| Examples of rounding | ||
|---|---|---|
| Input | Displays as | Note |
| {{convert|123|ft|m|-1}} | 123 feet (40 m) | |
| {{convert|123|ft|m|0}} | 123 feet (37 m) | |
| {{convert|123|ft|m|1}} | 123 feet (37.5 m) | |
| {{convert|550|ft|m|0}} | 550 feet (168 m) | Approximate value is 167.64 m |
| {{convert|550|ft|m}} | 550 feet (170 m) | Rounds to 170, when approximate value is 167.64 m |
| {{convert|500|ft|m|0}} | 500 feet (152 m) | Approximate value is 152.4 m |
| {{convert|500|ft|m}} | 500 feet (150 m) | Rounds to 150, when approximate value is 152.4 m |
Convert supports four types of rounding:
Round to a given precision: use |precision=
[edit]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 power of 1/10 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: use |sigfig=
[edit]To specify the output number to be with n significant figures use |sigfig=<number>:
- To compare: {{convert|1200|ft|m}} → 1,200 feet (370 m)
- {{convert|1200|ft|m|sigfig=4}} → 1,200 feet (365.8 m)
- {{convert|1200|ft|m|sigfig=3}} → 1,200 feet (366 m)
- {{convert|1200|ft|m|sigfig=2}} → 1,200 feet (370 m)
- {{convert|1200|ft|m|sigfig=1}} → 1,200 feet (400 m)
Setting |sigfig= is meaningless
- {{convert|1200|ft|m|sigfig=0}} → 1,200 feet (370 m)*
Round to a multiple of 5: 15, 20, 25, ...
[edit]Using |round=5 rounds the outcome to a multiple of 5.
{{convert|10|m|ft}}→ 10 metres (33 ft){{convert|10|m|ft|round=5}}→ 10 metres (35 ft)
Similar: using |round=25 rounds the outcome to a multiple of 25.
{{convert|10|m|ft}}→ 10 metres (33 ft){{convert|10|m|ft|round=25}}→ 10 metres (25 ft)- To compare:
{{convert|10|m|ft|sigfig=4}}→ 10 metres (32.81 ft)
In a range, one can round each value individually to the default. Use |round=each:
{{convert|10 x 200 x 3000|m|ft}}→ 10 by 200 by 3,000 metres (33 ft × 656 ft × 9,843 ft){{convert|10 x 200 x 3000|m|ft|round=each}}→ 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
[edit]Specify the desired denominator using |frac=<some positive integer>. (Denominator is the below-the-slash number, for example the 3 in 1/3).
{{convert|5.56|cm|in|frac=16}}→ 5.56 centimetres (2 3⁄16 in){{convert|8|cm|in|frac=4}}→ 8 centimetres (3 1⁄4 in)
The fraction is reduced when possible:
{{convert|8|cm|in|frac=100}}→ 8 centimetres (3 3⁄20 in){{convert|8|cm|in}}→ 8 centimetres (3.150 in) (To compare)
Rounding the temperatures °C, °F and K
[edit]In temperatures, the conversion will be rounded either to 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.
{{convert|10|C|F K}}→ 10 °C (50 °F; 283 K)
Note
- For a temperature difference, like to convert "A rise of 20 °C", use
|C-change=20&tc. {{convert|20|C-change|F-change K-change}}→ A rise of 20 °C (36 °F; 20 K)
- To compare: "A temperature of 20 °C" would yield: A temperature of 20 °C (68 °F; 293 K)
Into multiple units: 10 °C (50 °F; 283 K)
[edit]Separate the multiple output units by a space:
{{convert|10|C|F K}}→ 10 °C (50 °F; 283 K){{convert|5|km|mi nmi}}→ 5 kilometres (3.1 mi; 2.7 nmi)
Ranges of values
[edit]A range: 6 to 17 kg (13 to 37 lb)
[edit]Range indicators are entered as the second parameter (between the values). Range separators can be:
| 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 dashes |
– –(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 &[convert: unknown unit] | Same as and
|
and(-)
|
{{convert|3|and(-)|6|ft}}
|
3 and 6 feet (0.91–1.83 m) | |abbr=on alters the punctuation
|
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
|
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) | |
Multiple dimensions: 6 m × 12 m (20 ft × 39 ft)
[edit]- Use "by"
{{convert|6|by|12|ft|m}}→ 6 by 12 feet (1.8 by 3.7 m)- Use "×" or ""x""
{{convert|6|x|12|m|ft}}→ 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):
{{convert|6|x|12|m|ft|abbr=on}}→ 6 m × 12 m (20 ft × 39 ft)
About feet, inch in ranges and multiples
[edit]While it is possible to enter feet, inch in a simple conversion, this is not possible for ranges:
{{convert|1|ft|3|in|mm}}→ 1 foot 3 inches (380 mm) (to compare){{convert|1|ft|3|in|x|3|ft|5|in|mm}}→ 1 foot 3 inches ([convert: unknown unit])*
Words
[edit]Spelling of unit name: UK metre or US meter?
[edit]Default spelling of units is the British metre. To show the American spelling, use |sp=us:
{{convert|1|m|ft}}→ 1 metre (3.3 ft) -- default{{convert|1|m|ft|sp=us}}→ 1 meter (3.3 ft)
Spell out numbers: ten miles
[edit]To write a number in words, use |spell=in:
{{convert|10|mi|m|spell=in}}→ 10 miles (16,000 m)*
To make first letter a capital, use |spell=In
{{convert|10|mi|m|spell=In}}→ 10 miles (16,000 m)*
Extra words: 4 planted acres
[edit]- Incomplete section
{{convert|4|acre||adj=pre|planted}}→ 4 planted acres (1.6 ha)
Extra adjective words: A 10-foot-long corridor
[edit]{{convert|4|ft|m|adj=mid|-long}}→ 10-foot-long (3.0 m)
Grammatical construction: The 18-, 24- and 32-pounder (8, 11 and 15 kg) cannons
[edit]- "The American defenders had 18-, 24- and 32-pounder (8, 11 and 15 kg) cannons."
This formatted result is not possible straightforward by using {{convert}}. However, it can be made in three steps.
- 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 numbers 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. The template {{convert}} itself has disappeared. You can change the text as needed. 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".
Numbers
[edit]Using an SI prefix: gigameter (Gm), or micrometer (μm)
[edit]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):
{{convert|12|Gm|mi|abbr=on}}→ 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:
{{convert|12000|mi||Mm|abbr=on}}→ 12,000 mi (19 Mm){{convert|12|in|μm|abbr=on}}→ 12 in (300,000 μm)
As an exception, the non-SI unit "inch" can have the "μ" prefix too)
{{convert|12|μm|μin|abbr=on}}→ 12 μm (470 μin)
Thousands separator: 1,000 mi and 1000 mi
[edit]In input, a comma for thousands separator is accepted. A gap (space) is not. In output, by default, the thousand separator is the comma:
{{convert|1,234,567|m|ft}}→ 1,234,567 metres (4,050,417 ft){{convert|1,234,567|m|ft}}→ 1,234,567 metres (4,050,417 ft){{convert|1 234 567|m|ft}}→ [convert: invalid number]
Set |comma=off to remove the separator:
{{convert|1234567|m|ft|comma=off}}→ 1,234,567 metres (4,050,417 ft)*
Use |comma=gaps to set digit grouping by gap (<space>) in larger numbers (thousands separator):
{{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 only add the separator 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}}→ 1,234 metres (4,049 ft)*{{convert|1234567|m|ft|comma=gaps5}}→ 1,234,567 metres (4,050,417 ft)*
Output manipulation
[edit]Brackets and separators: 10 m [33 ft]
[edit]Punctuation that distinguishes the two measurements is set by |disp=.
Options are: b (the default), sqbr, comma, or, br, x|...:
{{convert|10|m|ft}}→ 10 metres (33 ft) -- ( ) brackets are the default{{convert|10|m|ft|disp=sqbr}}→ 10 metres [33 ft]{{convert|10|m|ft|disp=comma}}→ 10 metres, 33 ft{{convert|10|m|ft|disp=or}}→ 10 metres or 33 feet
Setting |disp=br will force a new line (<br>)
{{convert|10|m|ft|disp=br}}→ 10 metres
33 feet
Setting |disp=x|... allows any text as separator:
{{convert|10|m|ft|disp=x|_MyText_}}→ 10 metres_MyText_33 ft -- (To display spaces, use )
Flipping (reordering) the two measurements: 1,609.3 metres (1 mile)
[edit]Setting |order=flip will flip (swap) the two measurements:
{{convert|1|mi|m}}→ 1 mile (1,609.3 metres) (To compare, default){{convert|1|mi|m|order=flip}}→ 1,609.3 metres (1 mile)
When converting to multiple units, the effect is:
{{convert|10|km|mi nmi|order=flip}}→ 6.2137 miles; 5.3996 nautical miles (10 kilometres){{convert|10|km|nmi mi|order=flip}}→ 5.3996 nautical miles; 6.2137 miles (10 kilometres)
Displaying parts of the result: 2 (1.5)
[edit]It is possible to display only parts of the conversion result:
| Convert | Output | Description |
|---|---|---|
{{convert|2|cuyd|m3}} |
2 cubic yards (1.5 m3) | Default, to compare |
{{convert|2|cuyd|m3|abbr=values}} |
2 (1.5) | Input and output numbers |
{{convert|2|cuyd|m3|disp=unit}} |
cubic yards | Input unit |
{{convert|2|cuyd|m3|disp=unit|adj=on}} |
cubic-yard | Input unit, adjective (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|disp=out|abbr=off}} |
2 cubic yards (1.5 m3)* | Output value and unit |
Table options
[edit]For the wikitable structure, there are two options: split over columns and make the table sortable.
Show numbers only in columns in a table
[edit]Using {convert} in a table cell, with |disp=table splits the result over two columns:
{{convert|10|m|ft|disp=table}}→ style="text-align:right;"|10
|style="text-align:right;"|33
|disp=tablecen does the same, and also centers the text:
{{convert|20|m|ft|disp=tablecen}}→ style="text-align:center;"|20
|style="text-align:center;"|66
The units are added as a column header:
m ft |disp=table10 33 |disp=tablecen20 66 |disp=<other>(default)30 metres (98 ft)
Sorting
[edit]- Use both
|disp=table|sortable=onto produce table columns (pipe symbols), with sortable table column. As of January 2013, only the first (lefthand) column will sort (improvements pending).
- {{convert|10|m|ft|disp=table|sortable=on}} →
style="text-align:right;" data-sort-value="7001100000000000000"|10
|style="text-align:right;" data-sort-value="7001100000000000000"|33
- This shows the hidden numerical sortkey:
align="right"|<span style="display:none">7001100000000000000</span>10 |align="right"|33
m ft 15 3⁄4 52 15.5 51 16.0 52.5 16 52
Parameter list
[edit]| 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 | |
|adj=1
|
Unit name is singular when number is 1 or less, but not zero | Grammar, plural | |
|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 | |
TemplateData
[edit]Converts measurements to other units.
| Parameter | Description | Type | Status | |
|---|---|---|---|---|
| Value | 1 | The value to convert. | Number | required |
| From unit | 2 | The unit for the provided value.
| String | required |
| 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.
| String | suggested |
| Precision or suffix | 4 | Significant digits after decimal dot or, if negative, exponent of ten. | Number | optional |
| 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. For more fine-grained control over which units to link, use the template multiple times.
| String | optional |
| 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).
| String | suggested |
| Spelling | sp | Spelling of units. Use “us” to display unit names using U.S. spelling.
| String | optional |
| 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.
| Unbalanced wikitext | optional |
| 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.
| String | optional |
| Ordering | order | “flip” returns converted value first, input value second.
| String | optional |
| Significant figures | sigfig | Indicates the number of significant figures to be used in rounding. | Number | optional |
| 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. | Number | optional |
| 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').
| Boolean | optional |
| Sort key | sortable | “on” generates a hidden sort key
| Boolean | optional |
| Spell numbers? | spell | If used, spells input or input and output numbers in words, optionally capitalizing the first
| String | optional |
| Singular? | sing | If 'yes', uses singular form of units (deprecated)
| Boolean | deprecated |
| Fraction? | frac | fraction as rounding unit | Number | optional |
| Currency symbol | $ | sets currency symbol in both units
| String | optional |
| Mach altitude (ft) | altitude_ft | Mach (speed) depends on altitide
| Number | optional |
| Mach altitude (m) | altitude_m | Mach (speed) depends on altitude | Number | optional |
| WD property | input | Reads the property value of the item (article), then converts it
| String | optional |