Speed & Velocity Converter
Convert velocity across Miles per Hour, Kilometers per Hour, Knots, and Meters per Second. Convert between metric, US customary, and imperial units using documented conversion factors and high-precision decimal calculations.
Live Interactive Calculator
kilometer per hour = meter per second × 3.6Popular Speed & Velocity Conversions
Explore dedicated guides with exact formulas, conversion factors, worked calculation steps, and quick reference tables.
Miles per Hour to Kilometers per Hour
Convert Mile per Hour to Kilometer per Hour with exact formula and quick lookup tables.
Kilometers per Hour to Miles per Hour
Convert Kilometer per Hour to Mile per Hour with exact formula and quick lookup tables.
Meters per Second to Kilometers per Hour
Convert Meter per Second to Kilometer per Hour with exact formula and quick lookup tables.
Knots to Miles per Hour
Convert Knot to Mile per Hour with exact formula and quick lookup tables.
Major Speed & Velocity Units & Definitions
Standard measurement units, measurement systems, and documented sources.
Meter per Second
m/sThe SI derived unit of speed and velocity, representing the distance of one meter traversed in a duration of one second.
Kilometer per Hour
km/hA metric unit of speed expressing the number of kilometers traveled in one hour. The standard traffic speed indicator in the majority of nations.
Mile per Hour
mphA customary unit of speed indicating the statute miles traveled in one hour. Standard speed measurement on roads in the United States and the United Kingdom.
Knot
knA unit of speed equal to one nautical mile per hour (exactly 1.852 km/h or approximately 0.5144 m/s). Universally used in aviation and maritime navigation.