Convert Mile per hour to Kilometre per hour
1 mile per hour = 1.609344 kilometre per hour (km/h). For example, 10 mile per hour = 16.09344 kilometre per hour and 100 mile per hour = 160.9344 kilometre per hour. Type any value below to convert mile per hour to kilometre per hour both ways — it runs entirely in your browser.
Mile per hour to Kilometre per hour conversion formula
To convert mile per hour to kilometre per hour, multiply by 1.609344:
kilometre per hour = mile per hour × 1.609344
Going the other way, 1 kilometre per hour = 0.6213712 mile per hour, so
mile per hour = kilometre per hour × 0.6213712.
Mile per hour to Kilometre per hour — worked examples
| Mile per hour | Kilometre per hour |
|---|---|
| 1 mph | 1.609344 km/h |
| 2 mph | 3.218688 km/h |
| 3 mph | 4.828032 km/h |
| 5 mph | 8.04672 km/h |
| 10 mph | 16.09344 km/h |
| 25 mph | 40.2336 km/h |
| 50 mph | 80.4672 km/h |
| 100 mph | 160.9344 km/h |
Mile per hour ↔ Kilometre per hour reference table
| Mile per hour → Kilometre per hour | Kilometre per hour → Mile per hour |
|---|---|
| 1 mph = 1.609344 km/h | 1 km/h = 0.6213712 mph |
| 2 mph = 3.218688 km/h | 2 km/h = 1.242742 mph |
| 5 mph = 8.04672 km/h | 5 km/h = 3.106856 mph |
| 10 mph = 16.09344 km/h | 10 km/h = 6.213712 mph |
| 20 mph = 32.18688 km/h | 20 km/h = 12.42742 mph |
| 50 mph = 80.4672 km/h | 50 km/h = 31.06856 mph |
| 100 mph = 160.9344 km/h | 100 km/h = 62.13712 mph |
| 250 mph = 402.336 km/h | 250 km/h = 155.3428 mph |
| 500 mph = 804.672 km/h | 500 km/h = 310.6856 mph |
| 1000 mph = 1,609.344 km/h | 1000 km/h = 621.3712 mph |
About mile per hour and kilometre per hour
Mile per hour: Miles per hour — the US/UK road-speed unit. 1 mph = 1.609344 km/h = 0.44704 m/s.
Kilometre per hour: Kilometres per hour — the metric road-speed unit. 1 km/h = 1/3.6 ≈ 0.2778 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 kilometre per hour are in 1 mile per hour?
- 1 mile per hour = 1.609344 kilometre per hour (km/h).
- How do I convert mile per hour to kilometre per hour?
- Multiply the number of mile per hour by 1.609344. For example, 10 mile per hour = 10 × 1.609344 = 16.09344 kilometre per hour.
- How many mile per hour are in 1 kilometre per hour?
- 1 kilometre per hour = 0.6213712 mile per hour.
- Which is bigger, mile per hour or kilometre per hour?
- 1 mile per hour equals 1.609344 kilometre per hour, so a mile per hour is the larger unit.