*Ranges are preferably formatted with one rather than two percentage signifiers (''22–28%'', not ''22%–28%'').
*For US-related articles, the main units are US units; for example, ''23 miles (37 km)''.
*For UK-related, the main units are either metric or imperial (consistently within an article).
*If editors cannot agree on the sequence of units, put the source value first and the converted value second. If the choice of units is arbitrary, use SI units as the main unit, with converted units in parentheses.
*Conversions to and from metric and imperial/[[United States customary units|US units]] should generally be provided. There are two exceptions:
**articles on scientific topics where there is consensus among the contributors not to convert the metric units, in which case the first occurrence of each unit should be linked;