Kilometer per hour to Mile per hour
Kilometer per hour (km/h)
Mile per hour (mph)
How it is calculated
Each unit is defined via the base unit (meter per second (m/s)). The value is first converted to the base unit, then to the selected unit.
1 km/h = 0.277777777778 m/s
1 mph = 0.44704 m/s
1 km/h × 0.277777777778 = 0.277777777778 m/s
0.277777777778 m/s ÷ 0.44704 = 0.621371192237 mph