## Kilometer

### General Information

**Unit system** | metric |

**Unit of** | Length |

**Symbol** | km |

Kilometre is a unit of length in the metric system, 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 unit used.

## Foot

The foot (pl. feet), abbreviation and IEEE standard symbol: **ft**, is a unit of length in the British imperial and United States customary systems of measurement. Since the International Yard and Pound Agreement of 1959, one foot is defined as 0.3048 meters exactly. In customary and imperial units, one foot comprises 12 inches and one yard comprises three feet.