Miles per Hour to Kilometers per Hour Converter
Convert miles per hour (mph) to kilometers per hour (km/h), with the formula, a conversion table and exact factors.
Change the values and press Calculate to work out your own figures.
Enter a speed, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.
Show the working
- 1 mph = 1.609344 km/h
- 1 × 1.609344 = 1.609344 km/h
How to convert miles per hour to kilometers per hour
1 mph = 1.609344 km/h, so multiply by 1.609344 to go from miles per hour to kilometers per hour. Going the other way, 1 km/h = 0.621371192237 mph.
km/h = mph × 1.609344 mph = km/h × 0.621371192237
Worked example:
1 mph = 1.609344 km/h 5 × 1.609344 = 8.04672 km/h
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 |
| 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 |
| 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 |
| 75 mph | 120.7008 km/h |
| 100 mph | 160.9344 km/h |
| 250 mph | 402.336 km/h |
| 500 mph | 804.672 km/h |
| 1000 mph | 1,609.344 km/h |
About the units
- Miles per Hour (mph)
- Miles per hour, a US customary unit. Definition: NIST Handbook 44 (2024), Appendix C: General Tables of Units of Measurement.
- Kilometers per Hour (km/h)
- Kilometers per hour, a metric unit. Definition: BIPM SI Brochure, 9th edition (SI units, prefixes and units accepted for use with the SI).