Mile per Hour (mph)
The mile per hour is a unit of speed, used for vehicle speed in the US/UK, baseball pitch speed, and hurricane wind speed. Its symbol is mph.
mph
km/h
1 mile per hour equals
| Kilometers per Hour | 1.60934 km/h |
| Meters per Second | 0.44704 m/s |
About the mile per hour
Miles per hour became common in the US and UK with the advent of automobiles in the early 20th century. It is still the standard for road speeds in those countries.
In everyday use the mile per hour appears in vehicle speed in the US/UK, baseball pitch speed, and hurricane wind speed. As a point of reference: the fastest recorded baseball pitch was 105.1 miles per hour.