How to convert Mile per hour to Kilometer per hour

Conversion factor and calculation steps from Mile per hour (mph) to Kilometer per hour (km/h).

Conversion logic

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 mph = 0.44704 m/s

1 km/h = 0.277777777778 m/s

1 mph × 0.44704 = 0.44704 m/s

0.44704 m/s ÷ 0.277777777778 = 1.609344 km/h