Miles per hour to Kilometers per hour Converter (mph to km/h)
Convert miles per hour to kilometers per hour instantly with our free mph to km/h calculator. Enter a value to see the result.
How to convert miles per hour to kilometers per hour
To change mph into km/h, use this formula:
Quick mental estimate: multiply by about 1.6.
Example: to convert 25 mph to km/h, calculate 40.2336 km/h. To go the other way, use mph = km/h ÷ 1.60934.
Popular miles per hour to kilometers per hour conversions
- 1 mph to km/h = 1.60934 km/h
- 2 mph to km/h = 3.21869 km/h
- 3 mph to km/h = 4.82803 km/h
- 5 mph to km/h = 8.04672 km/h
- 10 mph to km/h = 16.0934 km/h
- 15 mph to km/h = 24.1402 km/h
- 20 mph to km/h = 32.1869 km/h
- 25 mph to km/h = 40.2336 km/h
- 30 mph to km/h = 48.2803 km/h
- 40 mph to km/h = 64.3738 km/h
- 50 mph to km/h = 80.4672 km/h
- 60 mph to km/h = 96.5606 km/h
- 70 mph to km/h = 112.654 km/h
- 80 mph to km/h = 128.748 km/h
- 90 mph to km/h = 144.841 km/h
- 100 mph to km/h = 160.934 km/h
Miles per hour to Kilometers per hour conversion chart
| Miles per hour (mph) | Kilometers per hour (km/h) |
|---|---|
| 1 mph | 1.60934 km/h |
| 2 mph | 3.21869 km/h |
| 5 mph | 8.04672 km/h |
| 10 mph | 16.0934 km/h |
| 20 mph | 32.1869 km/h |
| 25 mph | 40.2336 km/h |
| 50 mph | 80.4672 km/h |
| 75 mph | 120.701 km/h |
| 100 mph | 160.934 km/h |
| 250 mph | 402.336 km/h |
| 500 mph | 804.672 km/h |
| 1,000 mph | 1,609.34 km/h |
When do you need mph to km/h conversion?
This conversion is commonly used for driving, aviation, sailing and sports. Different countries and industries use different units, so converting miles per hour to kilometers per hour helps you compare measurements accurately.
Frequently asked questions
How many kilometers per hour are in 1 miles per hour?
1 mph equals 1.60934 km/h.
How do I convert miles per hour to kilometers per hour?
Use the formula km/h = mph × 1.60934. For example, 25 mph = 40.2336 km/h.
What is 10 mph in km/h?
10 mph = 16.0934 km/h.
What is 100 mph in km/h?
100 mph = 160.934 km/h.
How do I convert km/h back to mph?
Use mph = km/h ÷ 1.60934. You can also use our Kilometers per hour to Miles per hour converter.
Is this mph to km/h converter accurate?
Yes. It uses standard international conversion factors and shows up to 6 significant digits.