Convert km/h to mph instantly — formula, worked examples and a conversion table of common values.
Convert kilometres per hour (km/h) to miles per hour (mph). Enter a value on either side and the other updates instantly — nothing is sent to a server.
One km/h equals 0.621371 mph. The table below lists the values people look up most often, and each one links to a page with the worked calculation.
mph = km/h ÷ 1.609344| Kilometres per hour (km/h) | Miles per hour (mph) |
|---|---|
| 0.1 | 0.0621371 |
| 0.5 | 0.310686 |
| 1 | 0.621371 |
| 2 | 1.24274 |
| 3 | 1.86411 |
| 5 | 3.10686 |
| 10 | 6.21371 |
| 15 | 9.32057 |
| 20 | 12.4274 |
| 25 | 15.5343 |
| 50 | 31.0686 |
| 75 | 46.6028 |
| 100 | 62.1371 |
| 250 | 155.343 |
| 500 | 310.686 |
| 1,000 | 621.371 |
1 km/h = 0.621371 mph.
10 km/h = 6.2137 mph.
100 km/h = 62.1371 mph.
Use the formula mph = km/h ÷ 1.609344. Or type any value into the converter above — it works in both directions.