Kilometers per hour to Miles per hour (km/h to mph)
A fast kilometers per hour-to-miles per hour calculator – the result updates as you type.
1 km/h = 0.621371 mph
1 km/h = 0.621371 mph. Enter a value and get the result instantly. Below you will find the formula and a table of commonly used values.
Formula
mph = km/h × 0.62137119
km/h to mph table
| km/h | mph |
|---|---|
| 1 km/h | 0.6214 mph |
| 2 km/h | 1.2427 mph |
| 5 km/h | 3.1069 mph |
| 10 km/h | 6.2137 mph |
| 20 km/h | 12.4274 mph |
| 50 km/h | 31.0686 mph |
| 100 km/h | 62.1371 mph |
| 500 km/h | 310.6856 mph |
| 1,000 km/h | 621.3712 mph |
Where it is used
Kilometres per hour are converted to miles per hour when driving in the USA or UK, where speed limits are given in mph. A 50 km/h urban limit is 31.07 mph, and 130 km/h on a motorway is 80.78 mph.
A quick mental shortcut
1 km/h = 0.621371 mph. Roughly, multiply by 0.6: 90 x 0.6 = 54 mph (the exact result is 55.92).
Exact examples: 50 x 0.621371 = 31.07 mph; 130 x 0.621371 = 80.78 mph.
Good to know
The standard top speed limit in the UK is 70 mph (the national limit), which is about 112.7 km/h.