Convert Kilometre per hour to Mile per hour
1 kilometre per hour = 0.6213712 mile per hour (mph). For example, 10 kilometre per hour = 6.213712 mile per hour and 100 kilometre per hour = 62.13712 mile per hour. Type any value below to convert kilometre per hour to mile per hour both ways — it runs entirely in your browser.
Kilometre per hour to Mile per hour conversion formula
To convert kilometre per hour to mile per hour, multiply by 0.6213712:
mile per hour = kilometre per hour × 0.6213712
Going the other way, 1 mile per hour = 1.609344 kilometre per hour, so
kilometre per hour = mile per hour × 1.609344.
Kilometre per hour to Mile per hour — worked examples
| Kilometre per hour | Mile per hour |
|---|---|
| 1 km/h | 0.6213712 mph |
| 2 km/h | 1.242742 mph |
| 3 km/h | 1.864114 mph |
| 5 km/h | 3.106856 mph |
| 10 km/h | 6.213712 mph |
| 25 km/h | 15.53428 mph |
| 50 km/h | 31.06856 mph |
| 100 km/h | 62.13712 mph |
Kilometre per hour ↔ Mile per hour reference table
| Kilometre per hour → Mile per hour | Mile per hour → Kilometre per hour |
|---|---|
| 1 km/h = 0.6213712 mph | 1 mph = 1.609344 km/h |
| 2 km/h = 1.242742 mph | 2 mph = 3.218688 km/h |
| 5 km/h = 3.106856 mph | 5 mph = 8.04672 km/h |
| 10 km/h = 6.213712 mph | 10 mph = 16.09344 km/h |
| 20 km/h = 12.42742 mph | 20 mph = 32.18688 km/h |
| 50 km/h = 31.06856 mph | 50 mph = 80.4672 km/h |
| 100 km/h = 62.13712 mph | 100 mph = 160.9344 km/h |
| 250 km/h = 155.3428 mph | 250 mph = 402.336 km/h |
| 500 km/h = 310.6856 mph | 500 mph = 804.672 km/h |
| 1000 km/h = 621.3712 mph | 1000 mph = 1,609.344 km/h |
About kilometre per hour and mile per hour
Kilometre per hour: Kilometres per hour — the metric road-speed unit. 1 km/h = 1/3.6 ≈ 0.2778 m/s.
Mile per hour: Miles per hour — the US/UK road-speed unit. 1 mph = 1.609344 km/h = 0.44704 m/s.
All speed factors are exact: 1 m/s = 3.6 km/h, 1 mph = 1.609344 km/h, 1 knot = 1.852 km/h, 1 ft/s = 0.3048 m/s. So the live tool and every number on this page always agree.
Frequently asked questions
- How many mile per hour are in 1 kilometre per hour?
- 1 kilometre per hour = 0.6213712 mile per hour (mph).
- How do I convert kilometre per hour to mile per hour?
- Multiply the number of kilometre per hour by 0.6213712. For example, 10 kilometre per hour = 10 × 0.6213712 = 6.213712 mile per hour.
- How many kilometre per hour are in 1 mile per hour?
- 1 mile per hour = 1.609344 kilometre per hour.
- Which is bigger, kilometre per hour or mile per hour?
- 1 mile per hour equals 1.609344 kilometre per hour, so a mile per hour is the larger unit.