Convert Miles per Hour to Kilometers per Hour
1 mile per hour = 1.609344 kilometers per hour. Multiply the number of miles per hour by 1.609344.
1 mph = 1.609344 km/h
Multiply the number of miles per hour by 1.609344.
Results are rounded for display. Double-check values for critical work.
Popular speed & velocity conversions
Miles per Hour to Kilometers per Hour table
| Miles per Hour | Kilometers per Hour |
|---|---|
| 1 mph | 1.609344 km/h |
| 2 mph | 3.218688 km/h |
| 3 mph | 4.828032 km/h |
| 4 mph | 6.437376 km/h |
| 5 mph | 8.04672 km/h |
| 10 mph | 16.09344 km/h |
| 20 mph | 32.18688 km/h |
| 25 mph | 40.2336 km/h |
| 50 mph | 80.4672 km/h |
| 100 mph | 160.9344 km/h |
| 500 mph | 804.672 km/h |
| 1000 mph | 1,609.344 km/h |
Miles per Hour to Kilometers per Hour in your head
Multiply by 8, then divide by 5.
That lands within 0.6% of the exact value.
10 mph → 16 km/h in your head, 16.0934 km/h exactly.
About these units
The mile per hour (mph) is an imperial unit of speed & velocity, equal to 0.44704 meters per second.
The kilometer per hour (km/h) is a metric unit of speed & velocity, equal to 0.27777778 meters per second.
Going the other way, 1 kilometer per hour = 0.62137119 miles per hour. Speed limits, wind reports, boat logs and aviation all use different units for the same idea. Convert between metric, imperial, nautical and scientific speeds instantly.
Frequently asked
- How many kilometers per hour are in a mile per hour?
- 1 mile per hour = 1.609344 kilometers per hour.
- How do you convert miles per hour to kilometers per hour?
- Multiply the number of miles per hour by 1.609344.
- What is 10 mph in km/h?
- 10 mph = 16.09344 km/h.