Speed & velocity

Convert km/h to mph

Enter a value in km/h to see the exact equivalent in mph. 1 km/h = 0.621371 mph.

The conversion

1 kilometre per hour equals exactly 0.621371192 miles per hour. The converter keeps full precision and rounds only what it shows.

Formula: Multiply the number of km/h by 0.621371192 to get mph.

Going the other way, 1 mile per hour = 1.609344 kilometres per hour.

Quick reference

Kilometre per hour Mile per hour
1 km/h 0.6214 mph
2 km/h 1.2427 mph
5 km/h 3.1069 mph
10 km/h 6.2137 mph
25 km/h 15.5343 mph
50 km/h 31.0686 mph
100 km/h 62.1371 mph

FAQ

How many mph are in 1 kilometre per hour?

1 kilometre per hour = 0.621371 miles per hour (rounded). The exact factor is 0.621371192.

What is the formula to convert km/h to mph?

Multiply the number of km/h by 0.621371192 to get mph.

Is this km/h-to-mph conversion exact?

1 kilometre per hour equals exactly 0.621371192 miles per hour. The converter keeps full precision and rounds only what it shows.