Kilometer to Inch Converter

About this conversion

The kilometer (km) is a unit of length in the metric (SI), commonly used for road and highway distances and geographic measurements. The inch (in) belongs to the imperial / US customary and is typically found in measurements related to TV and monitor screen diagonals and US and UK clothing sizes. By definition, one kilometer is one thousand meters. One inch is exactly 2.54 centimeters, by international agreement since 1959. The conversion factor between these two units is 39370.078740157485: multiplying any value in km by this number gives the equivalent in in. For example, 10 km equals 393700.7874 in. Going the other direction, 1 in equals 0.000025 km. Adopted alongside the metric system, the kilometer became the standard unit for land distance in most countries by the 20th century. The inch was historically based on the width of a human thumb. Its exact metric equivalent (2.54 cm) was standardized internationally in 1959.