Units

Numerical values can have units assigned to them. Units are also values in their own right and can be entered without a number.

A given unit can have multiple names, and will always have at least one. Both the American English and British English versions of unit names are included, e.g. meter and metre are both valid. Also, both singular and plural versions are included. A unit can be referred to by any of its names. Unit names are case insensitive, and can contain spaces.

A given unit can also have multiple symbols, but might not have any. Symbols are case sensitive and never contain spaces.

Examples:

1 meter

1 METRE

23 metres

23 m

Ambiguous units

Since both US Customary and British Imperial units are included, some unit names such as "gallon" and "pint" are ambiguous as they refer to units that exist in both systems. When one of these ambiguous units is referred to, your unit systems preference order is used to resolve the name to a unit. For example, if you refer to a "pint" and US Customary is ahead of British Imperial in your unit systems preference order, then the "US pint" unit will be used.