Speed

Convert between km/h, mph, m/s, knots

01

POPULAR CONVERSIONS

Kilometer per Hour → Mile per Hour 1 km/h = 0.621371 mph Mile per Hour → Kilometer per Hour 1 mph = 1.6093 km/h Meter per Second → Kilometer per Hour 1 m/s = 3.6 km/h Kilometer per Hour → Meter per Second 1 km/h = 0.277778 m/s Knot → Kilometer per Hour 1 kn = 1.852 km/h Kilometer per Hour → Knot 1 km/h = 0.539957 kn Mile per Hour → Meter per Second 1 mph = 0.44704 m/s Meter per Second → Mile per Hour 1 m/s = 2.2369 mph
02

ALL UNITS

Meter per Second m/s

SI derived unit of speed
Kilometer per Hour km/h

Common metric speed unit
Mile per Hour mph

Imperial speed unit
Knot kn

Nautical speed unit (1 nautical mile per hour)
Foot per Second ft/s

Imperial speed unit
Mach Ma

Speed relative to the speed of sound in dry air at 20°C
Speed of Light c

Speed of light in vacuum