Template:Convert/doc
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 | This is a documentation subpage for Template:Convert. It contains usage information, categories, and other content that is not part of the original template page. |
Usage
This template can be used to show measurement quantities as primary and converted secondary units (or ranges), with optional rounding, wikilinks, abbreviation, or US spellings, and various separators including: parentheses (round brackets), slash, "or", hyphens, comma, "to" or dashes. Styles include: distance "32 metres (105 ft)" and "32 metres or 105 feet"; temperature "18 °C (64 °F)" or "18 °C (64 °F)*"; weight "55.0 kg (121.3 lb)" or "65 to 80 kg (143 to 176 lb)"; etc. For units see: Convert/list of units.
| Options include: | lk=in, abbr=on, sp=us, adj=on, adj=mid, disp=or, disp=table and sortable=on (explained below). By default, output is rounded to match the precision of input; alternatives include: sigfig=3 or using the end parameter, e.g. appending -2 to show full hundreds.
|
Single value:
{{convert|original_value|original_unit|conversion_unit|round_to|...}}
Range of values (see below for list of range options):
{{convert|orig_val1|range|orig_val2|original_unit|conversion_unit|round_to|...}}
- Numbers must be entered in unformatted form (without commas). For negative numbers (i.e. temperatures or precision) use a hyphen as the minus sign for the input number. Values output by the template will be displayed formatted and with a true minus sign where appropriate. To specify with commas, re-code a number as {{formatnum:9,000,500|R}} (becomes 9000500).
- Optional parameters, in examples below, allow abbreviated units (abbr=on), or US spellings (sp=us for meter), or slash separation (disp=s), or hyphenation (adj=on), etc.
- For this template many levels of substitution are possible, hence doing this fully, step by step, is cumbersome. Use Special:ExpandTemplates instead.
- The template has no in-built capacity for dimensional analysis. It is therefore up to the user to ensure that the input and output units are compatible. Do not, for example, attempt to convert barrels to tonnes (but see {{tl|bbl to t}}). Also beware of units with similar names; the code
oz, for example, is for the avoirdupois ounce (a unit of mass), do not use this if you want fluid ounces. - An attempt to convert a unit to itself (e.g. km to km), will result in a template loop.
- The range functionality is not fully implemented for all units, so experimentation may be required.
- This documentation page tends to lag behind in terms of what the template can do. For details see the talk page and its archives.
Examples
Single value
| Input | Displays as |
| {{convert|3.21|kg|lb}} | 3.21 kilograms (7.1 lb) |
| {{convert|3.21|kg|lb|0}} | 3.21 kilograms (7 lb) |
| {{convert|10|kg |lb |disp=or}} | 10 kilograms or 22 pounds |
| {{convert|6|ft|5|in|m}} | 6 feet 5 inches (1.96 m) |
| {{convert|10|mi}} | 10 miles (16 km) |
| {{convert|100|mpgus}} | 100 miles per US gallon (2.4 L/100 km; 120 mpg‑imp) |
| {{convert|120|km/h}} | 120 kilometres per hour (75 mph) |
| {{convert|18|°C|°F}} | 18 °C (64 °F) |
| {{convert|1250|sqft|m2|lk=in|sigfig=2}} | 1,250 square feet (120 m2) Note 'lk=in' links only the input unit. This example is for illustration only, common units of measurement should not be linked. See: wp:overlink. |
| {{convert|20.5|m3|cuyd|lk=out|abbr=on}} | 20.5 m3 (26.8 cu yd) Note 'lk=out' links only the output unit, cu yd. |
| {{convert|641|acre|km2 sqmi|lk=on}} | 641 acres (2.59 km2; 1.002 sq mi) Note 'lk=on' links all units. Per guidelines, common units should not be linked. See: wp:overlink. |
| {{convert|641|acre|km2 sqmi|2|lk=on}} | 641 acres (2.59 km2; 1.00 sq mi) Although 640 acres equals 1 square mile; 641 acres rounded to two decimal places equals 1.00 sq mi. |
Range of values
- Note: not yet operational for all units
| Input | Displays as |
| {{convert|60|and|170|kg|lb}} | 60 and 170 kilograms (130 and 370 lb) |
| {{convert|60|to|170|kg|lb}} | 60 to 170 kilograms (130 to 370 lb) |
| {{convert|60|to(-)|170|kg|lb}} | 60 to 170 kilograms (130–370 lb) |
| {{convert|60|-|170|kg|lb}} | 60–170 kilograms (130–370 lb) |
| {{convert|41|to|50|F|C}} | 41 to 50 °F (5 to 10 °C) |
| {{convert|41|-|50 |F|K}} | 41–50 °F (278–283 K) |
| {{convert|60|x|120|m|ft}} | 60 by 120 metres (200 ft × 390 ft) |
| {{convert|60|+/-|10|m|ft}} | 60 ± 10 metres (197 ± 33 ft) |
| {{convert|19|to|27|L|USgal}} | 19 to 27 litres (5.0 to 7.1 US gal) |
| {{convert|5|to|7|L|USgal|abbr=mos}} | 5 to 7 litres (1.3 to 1.8 US gal)* |
| {{convert|4|-|9|L|USgal|abbr=none}} | 4–9 litres (1.1–2.4 US gallons) |
The following conversions are currently not available as a range of values:
- Some imperial and US gallon-based units
- Fuel consumption units (mpg, L/100km)
- Large scale units (e3, e6, e9)
- Combination-based units (ft&in, st&lb, lb&oz) due to complexity of the conversion
Parameters
| Parameters | |
|---|---|
| Use US spelling | attach |sp=us
|
| Make units wikilinked | attach |lk=on to link all units (default: lk=off)attach |lk=in to link only the input unitsattach |lk=out to link only the output units(The manual of style suggests that you should not link common units of measurement). |
| Use the adjective form, or insert mid-text words | attach |adj=on (e.g. "The 190-foot (58 m) bridge" as opposed to "The 190 feet..."). This produces the adjective form—the unit name in the singular with a hyphen (according to the Manual of Style).attach |adj=mid (e.g. "The 190-foot bridge (58 m)" as: |adj=mid|bridge, or "The 190-foot-long bridge (58 m)" as: |adj=mid|-long bridge)Any rounding-parameter should follow the mid-text: "text|0". |
| Abbreviate units, or not | attach |abbr=on to show unit symbols (default: abbr=off)attach |abbr=none to show all unit names in full wordsattach |abbr=in to abbreviate input unitsattach |abbr=out to abbreviate output unitsattach |abbr=values to suppress unit names & show only values. So, {{convert|6|mi|abbr=values}} gives: 6 (9.7).
|
| Change "( )" to display other separators | attach |disp=comma to put comma, not brackets/parenthesesattach |disp=or to put "or" between unitsattach |disp=s (or |disp=/) for slash (e.g. 190 foot/58 metre). The default value is: disp=b for brackets/parentheses.
|
| Change "( )" to customized separators | attach |disp=x| (begin | end) to show "xx (begin yy end)"attach |disp=x|; to show "xx; yy"attach |disp=x| (same as |) to show "xx (same as yy)".
|
| Display output only | attach |disp=output only to show result number & unitattach |disp=output number only to show just numberNote when using "disp=output only" then the unit name can still be shown as full words by abbr=none, or linked by lk=on. |
| Display units inverted as reverse order | attach |disp=flip to reverse the order & show output unit firstSo, {{convert|6|km|disp=flip}} shows "3.2 mi (6 kilometres)". To get symbol "km" use abbr=in, to abbreviate the input unit. |
| Display unit name (only) | attach |disp=unit to show the unit name for a symbolThe unit name will be plural when the amount is not 1, or hyphenated when adj=on. So, {{convert|2|cuyd|disp=unit}} shows "cubic yards" plural. |
| Display amounts as table cells | attach |disp=table (or |disp=tablecen) Note: For use in tables, the template must start on a new line after a pipe. Only the number will be displayed unless you set |abbr=on, |lk=on, |lk=in or |lk=out. Example: here
|
| Round to a specified number of significant figures | attach |sigfig={some non-negative integer}. In the case of temperatures Celsius or Fahrenheit this refers to the difference with the absolute-zero temperature. For example, at room temperature two significant digits means rounded to tens of degrees.
|
| Round by 5 | attach |disp=5 to round the output amount to the nearest 5 units. Not supported for all options. |
| Let Convert decide the unit to convert to | put zero (0) or skip the convert to parameter (the 3rd unnamed parameter) e.g. {{convert|100|mi|0}} gives 100 miles (161 km).
|
| Display input value with a fraction | {{convert|3/8|in|mm|3|abbr=on}}→ 3⁄8 in (9.525 mm) or {{convert|11+1/4|in|cm|2|abbr=on}}→11 1⁄4 in (28.58 cm)
For negative amounts, use 2 minus signs: -11-1/4. |
| Generate a hidden sort key for use with a sortable table | attach |sortable=on to generate a hidden sort key (in the form of <span style="display:none">00000005</span>) so that sortable tables will sort correctly. This takes the first numeric value and left pads it with zeros to 16 places. It ignores any additional values, ie, if you use 6|ft|2|in as the value, it will only use the 6 for the sort key. This will cause numeric values to sort in numeric order, ie: 5, 10, 15 instead of 10, 15, 5.
|
Parameters still under construction
| Parameters still under construction. May not work in all situations | |
|---|---|
| Round by 5 | attach |disp=5 to round output to nearest 5 units. Might not work when linking unit names. |
| disp=tablecen | Similar to disp=table except that the values with be centered within the column. See the tables at La Nouvelle branch, BM-21 Grad for in use examples. |
| disp=comma | Similar to disp=s except the two values will be separated by a comma, for situations where the first value is already within parentheses. See the Geography tables on Labrador for an example. |
| abbr=in | Abbreviates only the input unit. |
| abbr=out | Abbreviates only the output unit. |
| abbr=comma | Abbreviates (removes) commas. This is a limited, temporary option, until comma=off can be implemented. For ranges, using abbr=comma conflicts with internal options, so instead, append "nocomma" to a range-word: tonocomma, bynocomma, andnocomma, -nocomma & xnocomma. |
| abbr=mos | For ranges, abbreviates with the input unit repeated, twice. Not to be confused with the specifications at MOS:NUM#Conventions. |
Rounding
Convert supports four types of rounding:
- Rounding to a given precision
- 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.
- Rounding to a given number of significant figures
- Specify the desired number of significant figures using
|sigfig={some non-negative integer}as noted above.
- Combine both of the above
- If both the desired precision and the desired number of significant figures are specified, the conversion will be rounded to the least precise of these.
- Default rounding
- If neither the desired precision nor the desired number of significant figures are specified, the conversion will be rounded either to a comparable precision as 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 the most precise. An exception to this is temperature wherein 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 the most precise.
Units supported
- See also: Convert/list of units
The table below lists units supported by this template. It is divided up according to the quantity being measured. Not all supported units are listed here; there are links to complete lists for each quantity.
The codes listed in the code column (column 3) are accepted as input by the template. These can be used as the second or third unnamed parameter. For some units there exist alternative codes. These are listed in brackets and have been incorporated to make the code more flexible for editors, e.g. °F or F may be entered.
The codes listed in the combinations column (column 7) can be used to produce multiple conversions. They can only be used as the third unnamed parameter, e.g. {{convert|55|nmi|km mi}} produces "55 nautical miles (102 km; 63 mi)".
{{Convert/list of units}}
Examples
- Monitor quality or look at examples at {{tl|Convert/check}}.
See also
- {{tl|convinfobox}} for use in infoboxes
- {{tl|bbl to t}} for converting barrel of oil to tonnes
- {{tl|CwtQtrLb to kg}} for converting long hundred weights, quarters and pounds into kilograms
- {{tl|Decdeg}} for converting degrees, minutes and seconds to decimal degrees
- {{tl|HMS2Deg}} for converting hour angles, given in hours, minutes and seconds, to decimal degrees
- {{t1|height}} for converting and displaying a person's height
- {{tl|miles-chains}} for converting miles and chains to kilometres linking "chains"
- {{tl|pop density}} for converting a population and area to a density
- {{tl|Inflation}} for calculating inflated prices
- {{tl|metricate}}
- {{tl|RailGauge}} for converting rail (track) gauges
- {{tl|Unit area}} for converting areas