Convert Mile/hour to Kilometer/hour
Mile/hour
Definition: A mile per hour (symbol: mph) is a unit of speed equal to the distance of one mile traveled in one hour, equivalent to approximately 0.44704 m/s.
History/Origin: Originated in England using the mile and hour from the Imperial system; adopted in the U.S. and U.K. for road and air transport.
Current Use: Used mainly in the United States, United Kingdom, and some Commonwealth countries for vehicle speed and road limits.
Kilometer/hour
Definition: A kilometer per hour (symbol: km/h) is a unit of speed expressing the number of kilometers traveled in one hour. One km/h equals approximately 0.27778 m/s.
History/Origin: Developed with the metric system in the 19th century for practical use in transportation and traffic measurement.
Current Use: Widely used around the world to measure vehicle speeds and speed limits in transportation.