Please provide values below to convert mile per hour [mph] to kilometer per hour [km/h], or vice versa.
Definition: Miles per hour is a unit of speed in the imperial and US customary systems, expressing the number of miles traveled in one hour.
History/origin: It became the standard unit for road speed as motor vehicles spread through the US and UK in the early 20th century.
Current use: Miles per hour is the standard for road speed limits and vehicle speedometers in the United States and the United Kingdom.
Definition: Kilometers per hour is a metric unit of speed, expressing the number of kilometers traveled in one hour.
History/origin: It follows directly from the SI units of distance (kilometer) and time (hour).
Current use: Kilometers per hour is the global standard for road speed limits and vehicle speedometers outside the United States and the United Kingdom.
| Mile per hour [mph] | Kilometer per hour [km/h] |
|---|---|
| 10 mph | 16.0934 km/h |
| 20 mph | 32.1868 km/h |
| 30 mph | 48.2802 km/h |
| 55 mph | 88.5137 km/h |
| 60 mph | 96.5604 km/h |
| 70 mph | 112.6538 km/h |
| 100 mph | 160.934 km/h |