Mile to Kilometer Converter

About this conversion

The mile (mi) is a unit of length in the imperial / US customary, commonly used for road distances in the US and UK and running race distances. The kilometer (km) belongs to the metric (SI) and is typically found in measurements related to road and highway distances and geographic measurements. By definition, one mile is exactly 1,760 yards, or approximately 1.609 kilometers. One kilometer is one thousand meters. The conversion factor between these two units is 1.609344: multiplying any value in mi by this number gives the equivalent in km. For example, 10 mi equals 16.0934 km. Going the other direction, 1 km equals 0.621371 mi. The mile descends from the Roman mille passuum ('thousand paces'). The statute mile of 5,280 feet was fixed in England in 1593. Adopted alongside the metric system, the kilometer became the standard unit for land distance in most countries by the 20th century.