Convert kilometers per hour to miles per hour quickly and accurately using this free online converter
Used for driving speed limits, athletic performance, and vehicle specs.
💡 The US and UK use mph; most countries use km/h for speed limits.
mph = km/h × 0.621372
Example: 1 km/h × 0.621372 = 0.621372 mph
Use mph for US/UK; km/h for international contexts.
Common uses: driving, athletics, and vehicle performance.
How do I convert km/h to mph?
Multiply the value in Kilometers per hour by 0.621372. For example: 10 km/h = 6.2137 mph.
When should I use Miles per hour instead of Kilometers per hour?
Use mph for US/UK; km/h for international contexts.
Is this converter accurate?
Yes. We use internationally recognized conversion factors, updated to current standards.
| Kilometers per hour (km/h) | Miles per hour (mph) |
|---|---|
| 10 km/h | 6.2137 mph |
| 20 km/h | 12.4274 mph |
| 30 km/h | 18.6412 mph |
| 50 km/h | 31.0686 mph |
| 60 km/h | 37.2823 mph |
| 80 km/h | 49.7097 mph |
| 100 km/h | 62.1372 mph |
| 120 km/h | 74.5646 mph |
| 150 km/h | 93.2058 mph |
| 200 km/h | 124.2743 mph |