Convert kilometer/hour to mile/hour
Please provide values below to convert kilometer/hour [km/h] to mile/hour [mi/h], or Convert mile/hour to kilometer/hour.
How to Convert Kilometer/hour to Mile/hour
1 km/h = 0.621371192287044 mi/h
Example: convert 15 km/h to mi/h:
15 km/h = 15 × 0.621371192287044 mi/h = 9.32056788430566 mi/h
Kilometer/hour to Mile/hour Conversion Table
| kilometer/hour | mile/hour |
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Kilometer/hour
Kilometer per hour (km/h) is a unit of speed expressing the number of kilometers traveled in one hour.
History/Origin
The km/h unit originated from the metric system, developed in France during the late 18th century, and became widely adopted for measuring speed in transportation and scientific contexts.
Current Use
Km/h is commonly used worldwide to specify vehicle speeds, speed limits, and other applications involving the measurement of speed in everyday life and transportation systems.
Mile/hour
Mile per hour (mi/h) is a unit of speed representing the number of miles traveled in one hour.
History/Origin
The mile per hour has been used primarily in the United States and the United Kingdom for measuring speed, especially in transportation, since the adoption of the imperial system. Its usage dates back to the widespread use of miles as a distance measure before metric standardization.
Current Use
Today, mi/h is commonly used in the United States and some other countries to express vehicle speeds, speed limits, and other transportation-related velocities. It remains a standard unit in contexts where the imperial system is prevalent.