Convert kilometers per hour to miles per hour instantly. Enter a speed in km/h to get the equivalent in mph — useful for driving abroad, car specs and sports.
How to convert km/h to mph
One mile is 1.609344 km, so to convert km/h to mph you divide by 1.609344 (or multiply by 0.621371).
Formula: mph = km/h × 0.621371
Example: A 120 km/h speed limit is 120 × 0.621371 = 74.56 mph. 60 km/h is 37.28 mph.
Tip: For a quick estimate, multiply by 5/8: 80 km/h × 5 ÷ 8 = 50 mph (49.7 exactly).
| Kilometers per Hour (km/h) | Miles per Hour (mph) |
|---|---|
| 10 | 6.213711922 |
| 20 | 12.42742384 |
| 30 | 18.64113577 |
| 40 | 24.85484769 |
| 50 | 31.06855961 |
| 60 | 37.28227153 |
| 70 | 43.49598346 |
| 80 | 49.70969538 |
| 90 | 55.9234073 |
| 100 | 62.13711922 |
| 110 | 68.35083115 |
| 120 | 74.56454307 |
| 130 | 80.77825499 |
| 150 | 93.20567884 |
| 200 | 124.2742384 |
Need a different unit? The Speed Converter handles every common speed unit.