Miles per hour is a unit of speed, expressing the number of international miles covered per hour. The common abbreviation in everyday use is mph, although formally mi/h is preferable. The preferred SI unit for velocity is m/s, although km/h is often used as a replacement for mi/h.

1 mi/h is equal to:

0.44704 m/s, the SI derived unit
1.609344 km/h
88 ft/s
approx. 0.868976 knots

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