# Speed conversion

Speed conversion is a free online calculator for converting metric and imperial units of speed. Conversion between meter/second, kilometer/hour, miles/hour, knot, nautical mile/hour
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kilometer/hour (km/h) - most used unit of speed. 1 km/h means 1 km of length traveled in one hour
kilometer/second (km/s) - unit of speed. 1 km/s means 1km of length traveled in one second
meter/hour (m/h) - unit of speed. 1 m/h means 1m of length traveled in one hour
meter/minute (m/min) - unit of speed. 1 m/min means 1m of length traveled in one minute
meter/second (m/s) - unit of speed. 1 m/s means 1m of length traveled in one second
centimeter/minute (cm/min)- unit of speed. 1 cm/min means 1m of length traveled in one minute
centimeter/second (cm/s) - unit of speed. 1 cm/s means 1cm of length traveled in one second
feet/second (ft/s) - unit of speed. 1 ft/s means 1 feet of length traveled in one second
mach - most used unit of air speed. 1 mach = 340.2933 m/s
mile/hour (mph) - most used unit of traffic speed in USA and United Kingdom. 1 mph= 1.6092 km/h
knot (kn) - unit of speed that is equal to 1 nautical mile/hour
nautical mile/hour (nm/h) - unit of speed. 1 nm/h means 1 nautical mile of length traveled in one hour
speed of light (c) - physical constant. c = 299 792 458 m/s