Kilometre

The kilometre (SI symbol: km; /ˈkɪləmiːtər/ or /kɪˈlɒmətər/), spelt kilometer in American English and Philippine English, is a unit of length in the International System of Units (SI), equal to one thousand metres (kilo- being the SI prefix for 1000). It is the preferred measurement unit to express distances between geographical places on land in most of the world; notable exceptions are the United States and the United Kingdom where the statute mile is used.

The abbreviation km is commonly used to represent kilometre. The abbreviation Km , is not recommended by the BIPM. A slang term for the kilometre in the US, UK, and Canadian militaries is klick.