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Convert mph to km/h, km/h to mph

Convert mph to km/h

mph
km/h

Convert km/h to mph

km/h
mph

Conversion Definitions

What are miles per hour (mph)?

Miles per hour is a unit of speed in both US Customary Units as well as the Imperial System. It measures the number of miles travelled in an hour. The symbol for miles per hour is mph.

What are kilometers per hour (km/h)?

Kilometers per hour is a unit of speed in the Metric System. It measures the number of kilometers travelled in an hour. The symbol for kilometers per hour is km/h and the International spelling is kilometres per hour.

Understanding the Speed Units

This table provides a summary of the Speed units within their respective measurement systems.

Unit Symbol Measurement System Description
inches per hour in/h US Customary Units/Imperial System  
feet per hour ft/h US Customary Units/Imperial System 1 ft/h = 12 in/h
yards per hour yd/h US Customary Units/Imperial System 1 yd/h = 3 ft/h
miles per hour mph US Customary Units/Imperial System 1 mph = 1760 yd/h
1 mph = 5280 ft/h
millimeters per hour mm/h Metric System 1000 mm/h = 1 m/h
centimeters per hour cm/h Metric System 100 cm/h = 1 m/h
1 cm/h = 10 mm/h
decimeters per hour dm/h Metric System 10 dm/h = 1 m/h
1 dm/h = 10 cm/h
meters per hour m/h Metric System 1 m/h = 1000 mm/h
1 m/h = 100 cm/h
1 m/h = 10 dm/h
kilometers per hour km/h Metric System 1 km/h = 1000 m/h