Kilometer (km)
The kilometer is a unit of length, used for road distances, running events, and geographic measurements. Its symbol is km.
km
ft
1 kilometer equals
| Feet | 3,280.84 ft |
| Meters | 1,000 m |
| Miles | 0.621371 mi |
| Inches | 39,370.1 in |
About the kilometer
The kilometer was introduced with the metric system in 1795 France. The prefix "kilo" comes from the Greek word "chilioi" meaning thousand.
In everyday use the kilometer appears in road distances, running events, and geographic measurements. As a point of reference: a marathon is 42.195 km.