Miles per hour

Miles per hour is a unit of measurement. It measures speed. It is the number of miles moved in an hour.

Miles per hour is the unit used for speed limits on roads in the United Kingdom (UK) and the United States (US). It is normally abbreviated in everyday use to mph. In technical publications, it is sometimes abbreviated as mi/h.

The SI unit for velocity is m·s⁻¹ (metres per second).

Speed limit units on traffic signs around the world:

  Kilometers per hour (km/h)

  Miles per hour (mph)

  Both

  No speed limit units

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Conversions

1 mph equals:

• 0.44704 m·s⁻¹, the SI derived unit
• 1.609344 km·h⁻¹
• 22/15 =1.4667 feet per second
• ~0.868976 knots