This category of measurement units is defined by the "length" type, which is an SI base quantity.
The SI base unit for length is the metre.
If you are traveling, you can measure your travel distance or check the distance between cities and the driving distances for your next trip.
The metre, symbol: m, is the basic unit of distance (or of "length", in the parlance of the physical sciences) in the International System of Units. The internationally-accepted spelling of the unit in English is "metre", although the American English spelling meter is a common variant. However, both American and non-American forms of English agree that the spelling "meter" should be used as a suffix in the names of measuring devices such as chronometers and micrometers.