Speed converter
Convert road, wind, aviation and scientific speeds between km/h, mph, m/s, knots and ft/s.
km/h
mph
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1 meter per second in other speed units
| Unit | Value |
|---|---|
| Km/h (km/h) | 3.6 km/h |
| Mph (mph) | 2.236936 mph |
| Knots (kn) | 1.943844 kn |
| Feet per Second (ft/s) | 3.28084 ft/s |
About speed units
Speed is distance divided by time. The SI unit is the meter per second; km/h and mph are used on roads, and the knot (one nautical mile per hour) is used at sea and in the air.
Where speed conversions are used
Speed conversions are useful for driving abroad, reading wind forecasts, running and cycling paces, sailing and aviation.
Conversion factors use exact international definitions where they exist (for example 1 inch = 2.54 cm and 1 lb = 0.45359237 kg). Results are rounded for display only.