Convert miles per hour (mph) to km/h, m/s, knots, and Mach.
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The mile per hour (mph) is an imperial unit of speed, primarily used in the US, the UK, and a few other countries for road speed limits and speedometers.
Common mph Conversions
- 1 mph = 1.609 km/h — multiply by 1.609 to convert to kilometers per hour.
- 1 mph ≈ 0.447 m/s — multiply by 0.447 to convert to meters per second.
- 1 mph ≈ 0.869 knots — multiply by 0.869 to convert to nautical miles per hour.
- 1 mph ≈ 0.00131 Mach — at sea level and 20 °C.
Most countries use km/h, making mph to km/h one of the most common speed conversions when traveling or consuming foreign media.