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Speed Converter

Convert between any of the 6 supported Speed units. Pick the units, type a value, done.

Supported units

Kilometers per Hour (km/h): Road speed in most of the world.

Miles per Hour (mph): Road speed in the US and UK. 1 mph is about 1.609 km/h.

Meters per Second (m/s): The SI unit of speed, standard in physics and wind measurements.

Knots (kn): One nautical mile per hour, about 1.852 km/h. Ships, aircraft and wind at sea.

Feet per Second (ft/s): About 0.68 mph. Projectiles and falling objects in US engineering.

Mach (Ma): Multiples of the speed of sound, about 343 m/s in air at 20 °C. Varies with altitude and temperature.

All conversions

km/h to mph km/h to m/s km/h to kn km/h to ft/s km/h to Ma mph to km/h mph to m/s mph to kn mph to ft/s mph to Ma m/s to km/h m/s to mph m/s to kn m/s to ft/s m/s to Ma kn to km/h kn to mph kn to m/s kn to ft/s kn to Ma ft/s to km/h ft/s to mph ft/s to m/s ft/s to kn ft/s to Ma Ma to km/h Ma to mph Ma to m/s Ma to kn Ma to ft/s