Speed Converter

Convert between every common speed unit. Pick the units, type a value, and the result updates instantly.

kilometers per hour (km/h)miles per hour (mph)meters per second (m/s)knots (kn)

kilometers per hour (km/h)miles per hour (mph)meters per second (m/s)knots (kn)

Speed units

Unit	Symbol	What it is
kilometer per hour	km/h	Used on road signs and car speedometers in most countries.
mile per hour	mph	Used for road speed in the US and UK.
meter per second	m/s	The SI unit of speed, common in science and weather.
knot	kn	One nautical mile per hour, used at sea and in aviation.

Popular speed conversions

kilometers per hour to miles per hour miles per hour to kilometers per hour knots to kilometers per hour meters per second to kilometers per hour