|
|
| Line 340: |
Line 340: |
|
| |
|
| In '''all articles''', the primary units chosen will be [[Wikipedia:International System of Units|SI]] units, [[Wikipedia:Non-SI units mentioned in the SI|non-SI units officially accepted for use with the SI]], or such other units as they appear in-game. | | In '''all articles''', the primary units chosen will be [[Wikipedia:International System of Units|SI]] units, [[Wikipedia:Non-SI units mentioned in the SI|non-SI units officially accepted for use with the SI]], or such other units as they appear in-game. |
|
| |
| ===Unit conversions===
| |
| {{shortcut|MOS:CONVERSIONS|WP:MOSCONVERSIONS}}
| |
| Where English-speaking countries use different units for the same quantity, provide a conversion in parentheses: {{xt|the Mississippi River is {{convert|2320|mi|km|0}} long}}; {{xt|the Murray River is {{convert|2508|km|mi|0}} long}}. In science-related articles, however, supplying such conversion is not required unless there is some special reason to do so.
| |
| * Where an [[imperial unit]] is not part of the [[United States customary units|US customary system]], or vice-versa{{snd}}and in particular, where those systems give a single term different definitions{{snd}}a double conversion may be appropriate: {{xt|Rosie weighed {{convert|80|kg|lb stlb}}}} (markup: <code><nowiki>{{convert|80|kg|lb stlb}}</nowiki></code>); {{xt|{{nobr|The car}} had a fuel economy of {{convert|5|L/100km|mpgus mpgimp|abbr=on}}}} (markup: <code><nowiki>{{convert|5|L/100km|mpgus mpgimp|abbr=on}}</nowiki></code>).
| |
| * Generally, conversions to and from metric units and US or imperial units should be provided, except:
| |
| ** When inserting a conversion would make a common or linked expression awkward ({{xt|The four-minute mile}}).
| |
| ** When units are part of the subject of a topic{{snd}}nautical miles in articles about the history of nautical law ({{xt|5 nautical miles}}), [[International System of Units|SI]] units in scientific articles ({{xt|a 600-kilometer asteroid}}), yards in articles about American football{{snd}}it can be excessive to provide conversions every time a unit occurs. It might be best to note that this topic will use the units (possibly giving the conversion factor to another familiar unit in a parenthetical note or a footnote), and link the first occurrence of each unit but not give a conversion every time it occurs.
| |
| * Converted quantity values should use a {{em|level of precision}} similar to that of the source quantity value, so {{xt|the Moon is 380,000{{nbsp}}kilometres (240,000{{nbsp}}mi) from Earth}}, not {{!xt|(236,121{{nbsp}}mi)}}. Small numbers may need to be converted to a range where rounding would cause a significant distortion, so {{xt|one mile (1–2{{nbsp}}km)}}, not {{!xt|one mile (2{{nbsp}}km)}}. Be careful especially when your source has already converted from the units you're now converting back to. This may be evidenced by multiples of common conversion factors in the data, such as 160 km (from 100 miles). {{crossref|See [[false precision]].}}
| |
| * [[:Category:Conversion templates|'''Conversion templates''']] can be used to convert and format many common units, including {{tlx|convert}}, which includes non-breaking spaces.
| |
| * In a '''direct quotation''', always retain the source units. Any conversions can be supplied either in the quote itself (in square brackets, following the original measurement) or in a footnote. {{crossref|See [[Wikipedia:Footnotes|footnoting]] and [[Wikipedia:Citing sources|citing sources]].}}
| |
| * {{tlx|Units attention}} may be added to articles needing general attention regarding choice of units and unit conversions.
| |
|
| |
|
| ===Unit names and symbols=== | | ===Unit names and symbols=== |
