Speed Converter
Convert speeds between km/h, mph, m/s, knots and more.
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All units
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● Conversions are calculated in your browser. Nothing is sent anywhere.
How it works
Conversions go through meters per second. 1 km/h = 1/3.6 m/s, 1 mph = 0.44704 m/s exactly and 1 knot = 1 nautical mile per hour = 0.5144 m/s. Mach 1 is taken at sea level and 15 °C (340.29 m/s); it depends on air temperature.