Convert Mile per Hour to Kilometer per Hour
Use this free converter to change miles per hour (mph) into kilometers per hour (km/h). Mile per hour and kilometer per hour both measure speed. As a quick reference, 1 mph equals 1.609344 km/h, and 1 km/h equals 0.62137119 mph.
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Kilometer per Hour (km/h)
1.609344
1 mph = 1.609344 km/h
Speed conversion table
| Mile per Hour | Kilometer per Hour |
|---|---|
| 0.01 | 0.01609344 |
| 0.1 | 0.1609344 |
| 0.5 | 0.804672 |
| 1 | 1.609344 |
| 2 | 3.218688 |
| 3 | 4.828032 |
| 5 | 8.04672 |
| 10 | 16.09344 |
| 20 | 32.18688 |
| 25 | 40.2336 |
| 50 | 80.4672 |
| 100 | 160.9344 |
| 1,000 | 1609.344 |
How to convert Mile per Hour to Kilometer per Hour
Multiply the mile per hour value by 1.609344 to get kilometers per hour.
- Enter the number of miles per hour you want to convert.
- The converter instantly shows the equivalent value in kilometers per hour.
- Worked example: 15 mph × 1.609344 = 24.14016 km/h.
- Use the swap button to reverse the conversion (kilometer per hour to mile per hour).
About these units
Mile per Hour (mph)
- Definition
- A mile per hour (mph) expresses speed as the number of miles travelled in one hour.
- History
- It developed with road and rail travel in Britain and the United States.
- Current use
- Miles per hour are used for speed limits and vehicle speeds in the US and UK.
Kilometer per Hour (km/h)
- Definition
- A kilometer per hour (km/h) expresses speed as the number of kilometers travelled in one hour.
- History
- It became common alongside metric road networks and the automobile.
- Current use
- Kilometers per hour are the standard speed unit on roads in most of the world.
Frequently asked questions
How many kilometers per hour are in a mile per hour?
There are 1.609344 km/h in 1 mph. To convert, multiply the number of miles per hour by 1.609344.
How do I convert miles per hour to kilometers per hour?
Multiply the mile per hour value by 1.609344 to get kilometers per hour. For example, 10 mph = 16.09344 km/h.
Is this mile per hour-to-kilometer per hour converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Mile per Hour to other speed units
| Unit | 1 Mile per Hour equals |
|---|---|
| Meter per Second (m/s) | 0.44704 m/s |
| Kilometer per Hour (km/h) | 1.609344 km/h |
| Knot (kn) | 0.86897624 kn |
| Foot per Second (ft/s) | 1.4666667 ft/s |
| Mach (Ma) | 0.0013033236 Ma |