How to convert miles per hour to kilometers per hour
To convert miles per hour (mph) to kilometers per hour (km/h), multiply the value in miles per hour by 1.609344.
km/h = mph × 1.609344
Example: 10 mph = 16.09344 km/h.
You can also type 10 mph to km/h into the smart calculator, or mix units: 1 mph + 1 km/h.
Miles per Hour to Kilometers per Hour conversion table
| Miles per Hour | Kilometers per Hour |
|---|---|
| 0.01 mph | 0.01609344 km/h |
| 0.1 mph | 0.1609344 km/h |
| 0.25 mph | 0.402336 km/h |
| 0.5 mph | 0.804672 km/h |
| 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 |
| 6 mph | 9.656064 km/h |
| 7 mph | 11.265408 km/h |
| 8 mph | 12.874752 km/h |
| 9 mph | 14.484096 km/h |
| 10 mph | 16.09344 km/h |
| 12 mph | 19.312128 km/h |
| 15 mph | 24.14016 km/h |
| 20 mph | 32.18688 km/h |
| 25 mph | 40.2336 km/h |
| 30 mph | 48.28032 km/h |
| 40 mph | 64.37376 km/h |
| 50 mph | 80.4672 km/h |
| 60 mph | 96.56064 km/h |
| 75 mph | 120.7008 km/h |
| 100 mph | 160.9344 km/h |
| 250 mph | 402.336 km/h |
| 500 mph | 804.672 km/h |
| 1,000 mph | 1,609.344 km/h |
Converting kilometers per hour back to miles per hour
1 km/h = 0.6213711922 mph. See the Kilometers per Hour to Miles per Hour converter, or press the swap button above.
About the units
Mile per hour (mph)
Exactly 0.44704 meters per second, the road speed unit in the US and UK.
Kilometer per hour (km/h)
The road speed unit in most of the world.
Speed is distance travelled per unit of time. The SI unit is the meter per second. Road speeds use km/h or mph, and a knot is one nautical mile per hour.
Questions and answers
How many kilometers per hour are in a mile per hour?
One mile per hour (mph) equals 1.609344 kilometers per hour (km/h).
How do I convert miles per hour to kilometers per hour?
To convert miles per hour to kilometers per hour, multiply the value in miles per hour by 1.609344. The formula is km/h = mph × 1.609344. For example, 10 mph = 16.09344 km/h.
What is 10 mph in km/h?
10 miles per hour is 16.09344 kilometers per hour.
Which is bigger, a mile per hour or a kilometer per hour?
A mile per hour is bigger: 1 mph = 1.609344 km/h.
What is a knot?
A knot is one nautical mile per hour: exactly 1.852 km/h, or about 1.151 mph.
Does this mph to km/h converter work offline?
Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.