Speed
Speed Converter
Convert between Meters per second, Kilometers per hour, Miles per hour, Feet per second, Knots instantly. Free speed converter with formulas and quick reference tables.
1 km/h = 0.621371 mph
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Speed and velocity units
Kilometers per hour and miles per hour are the everyday road units; 100 km/h is about 62 mph. Meters per second is the scientific standard, and the knot — one nautical mile per hour — is used in aviation and at sea because it maps cleanly onto degrees of latitude.