Nautical Mile to Kilometer Converter

About this conversion

The nautical mile (nmi) is a unit of length in the nautical / aviation, commonly used for maritime navigation and aviation route planning. 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 nautical mile is exactly 1,852 meters, corresponding to one minute of arc of latitude. One kilometer is one thousand meters. The conversion factor between these two units is 1.852: multiplying any value in nmi by this number gives the equivalent in km. For example, 10 nmi equals 18.5200 km. Going the other direction, 1 km equals 0.539957 nmi. Adopted alongside the metric system, the kilometer became the standard unit for land distance in most countries by the 20th century.