Mile per Hour to Kilometer per Hour
1 mph = 1.609344 km/h
How to convert mile per hour to kilometer per hour
Enter the value in mile per hour (mph) above and the equivalent in kilometer per hour (km/h) updates as you type. This conversion comes up when driving abroad: speed limit signs in a unit your speedometer does not show prominently.
- A common highway limit: 100 km/h is about 62 mph → that is 62.137119 mph in mile per hour.
- City limit: 30 km/h is about 19 mph → that is 18.641136 mph in mile per hour.
Typical situations: understanding running paces quoted in minutes per mile vs per km; comparing internet speeds (Mbps) with download times people quote in MB/s; interpreting wind speeds in weather forecasts across systems.
You can also convert in the other direction: Kilometer per Hour to Mile per Hour
Mile per Hour to Kilometer per Hour conversion table
| Mile per Hour (mph) | Kilometer per Hour (km/h) |
|---|---|
| 1 | 1.609344 |
| 2 | 3.218688 |
| 5 | 8.04672 |
| 10 | 16.09344 |
| 25 | 40.2336 |
| 50 | 80.4672 |
| 100 | 160.9344 |
Watch out for
- UK road signs are in mph while fuel is sold in liters; mixed system
- Confusing km/h with mph in a 30-vs-50 context nearly doubles or halves the real speed
Frequently asked questions
How many kilometers per hour is 1 mile per hour?
1 mile per hour = 1.609344 kilometers per hour.
What is the formula to convert mile per hour to kilometers per hour?
The formula is: km/h = mph × 1.609344.
What is 10 miles per hour in kilometers per hour?
10 miles per hour = 16.09344 kilometers per hour.