Convert km/h to mph and mph to km/h instantly. Bidirectional speed converter with formula and common values.
To convert kilometers per hour to miles per hour, multiply by 0.621371. One kilometer equals approximately 0.621371 miles, so the speed conversion uses the same factor.
| km/h | mph |
|---|---|
| 30 | 18.641 |
| 50 | 31.069 |
| 80 | 49.710 |
| 100 | 62.137 |
| 120 | 74.565 |
| 160 | 99.419 |
| 200 | 124.274 |
MPH to KM/H Converter
Convert miles per hour to kilometers per hour and km/h to mph.
Knots to KM/H Converter
Convert knots to kilometers per hour and km/h to knots for nautical speed.
M/S to KM/H Converter
Convert meters per second to kilometers per hour and km/h to m/s.
FT/S to M/S Converter
Convert feet per second to meters per second and m/s to ft/s.
Mach to KM/H Converter
Convert Mach number to kilometers per hour and km/h to Mach.
MPH to M/S Converter
Convert miles per hour to meters per second and m/s to mph.
One kilometer per hour equals approximately 0.621371 miles per hour.
Multiply the km/h value by 0.621371. For example, 120 km/h × 0.621371 = 74.565 mph.
100 km/h equals approximately 62.137 mph. This is a common highway speed limit in many metric countries.
Most countries use km/h as part of the metric system. The US, UK, and a few others still use mph. The UK displays speed limits in mph despite using metric for most other measurements.