Speed Converter
Convert speed between mph, km/h, knots, meters per second and feet per second. Enter a value and choose your units.
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Common Speed Conversions
| From | Equals |
|---|---|
| 1 mph | 1.609 km/h · 0.869 knots · 0.447 m/s |
| 1 km/h | 0.621 mph · 0.540 knots · 0.278 m/s |
| 1 knot | 1.852 km/h · 1.151 mph · 0.514 m/s |
| 1 m/s | 3.600 km/h · 2.237 mph · 1.944 knots |
Which Unit for Which Job?
- mph / km/h — road driving, running and cycling
- knots — sailing, boating and aviation (1 knot = 1 nautical mile per hour)
- m/s — physics, wind speed and scientific work
- ft/s — some engineering and ballistics contexts
Speed, Distance and Time
Speed connects distance and time: speed = distance ÷ time. To turn a speed into a journey time over a known route, use the walking time calculator, or convert marine and aviation distances with the nautical miles calculator.
Get Distance Tool
Download Distance Tool for iOS and start measuring in seconds.
