# Mile per hour conversions

The mile per hour conversion selector selects the speed/velocity measurement unit to convert to starting from miles per hour (mph). To make a conversion starting from a unit of speed other than mile per hour, simply click on the "Reset" button.

## About mile per hour

The **mile per hour** (or **mile/hour**) is a unit of speed in the Imperial and US customary systems of units equal to 0.44704 meters per second (1 mph = 0.44704 m/s), the derived unit of speed in the International System of Units (SI).

The mile per hour (mph) is also equal to approximately 1.609344 kilometers per hour (km/h), or 17.6 inches per second (in/s), or 1.466667 feet per second (ft/s) or 0.868976 knots (kn).

The speed is the distance traveled by an object during a period of time. Thus, miles per hour (or miles/hour) show how many miles are traveled in one hour. The mile is a unit of length in the Imperial / US customary system of units while the hour is a unit of time.

Mile per hour is commonly used in the United States and the United Kingdom in sports, road signs, and cars and aircrafts speedometers.

Symbol: mph

Plural: miles per hour