About the KMH to MPH Converter
Convert kilometers per hour (km/h) to miles per hour (mph) instantly. Includes the exact conversion factor, formula and a quick reference table.
Also known as: km/h to mph, Kilometers per hour to Miles per hour, convert Kilometers per hour to Miles per hour, kmh to mph, kilometers per hour to miles per hour, kph to mph.
How to use this calculator
- Enter value in kilometers per hour.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Open “Step-by-step” to see how the answer was worked out.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
mph = km/h × 0.6213711922
Worked example
Using the values pre-filled in the calculator above:
- Value in kilometers per hour = 100 km/h
the calculator returns:
- Miles per hour: 62.137119 mph
- Meters per second: 27.7778 m/s
- Feet per second: 91.1344 ft/s
- Knots: 53.9957 kn
Working
100 km/h × 0.6213711922 = 62.13711922 mph