When you need this conversion
Driving in a country that uses the other system, rental cars with metric speedometers, comparing car performance figures, and running or cycling speeds.
Quick reference
- 20 mph = 32.1869 km/h
- 30 mph = 48.2803 km/h
- 50 mph = 80.4672 km/h
- 60 mph = 96.5606 km/h
- 70 mph = 112.654 km/h
- 100 mph = 160.934 km/h
Speed limits
- 20 mph (32.19 km/h) is the UK counterpart of the European 30 km/h zone.
- 30 mph (48.28 km/h) plays the role of the usual 50 km/h town limit.
- 70 mph (112.65 km/h) sits between the 110 and 120 km/h motorway limits common in Europe.
Common mistakes
Using 1.6 for precise work. It’s 0.6% low, fine for driving, not for engineering.
Confusing mph with mi/min. 60 mph is 1 mile per minute.
For the reverse, use km/h to mph. For running pace, use the pace converter.