Kilometre

The kilometre (SI symbol: km; /ˈkɪləmiːtər/ or /kɪˈlɒmətər/), spelt kilometer in American 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 now the measurement unit used for expressing 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 the main unit used.

The abbreviations k or K (pronounced /keɪ/) are commonly used to represent kilometre, but are not recommended by the BIPM.[1][2] A slang term for the kilometre in the US, UK, and Canadian militaries is klick.[3][4]