How to convert km/h to MPH
The conversion is a single multiplication: 1 km/h = 0.621371 mph. To convert km/h to mph, multiply by 0.621371. To go back, multiply mph by 1.609344 (or divide by 0.621371). These factors are exact by definition.
Examples
- 60 km/h = 37.282272 mph
- 100 km/h = 62.137119 mph
km/h to MPH conversion table
| km/h (km/h) | MPH (mph) |
|---|---|
| 1 | 0.621371 |
| 5 | 3.106856 |
| 10 | 6.213712 |
| 20 | 12.427424 |
| 30 | 18.641136 |
| 50 | 31.06856 |
| 60 | 37.282272 |
| 70 | 43.495983 |
| 80 | 49.709695 |
| 100 | 62.137119 |
Frequently asked questions
- How do I convert MPH back to km/h?
- Use the MPH to km/h converter, or just swap the units on the full unit converter — it shows every unit in the category at once.
- Are these conversion factors exact?
- Yes. The English units have been defined in metric terms since 1959, so the factors used here are exact by definition, not rounded approximations. Displayed results are rounded only for readability.
- Can I convert other units too?
- The unit converter also handles length, weight, volume, temperature, area, speed, pressure, energy, power, torque, and fuel economy — each with every unit shown side by side.