speed conversion
Convert Kilometers per hour to Miles per hour
One kilometer per hour equals 0.62137 miles per hour. Enter any value below for an exact conversion.
How to convert Kilometers per hour to Miles per hour
- Type the number of kilometers per hour into the first field.
- The equivalent in miles per hour appears immediately.
- Swap the units to convert in the opposite direction.
Kilometers per hour to Miles per hour formula
mph = km/h × 0.62137
Worked example: to convert 12 km/h, multiply 12 × 0.62137 = 7.4565 mph.
This conversion factor is exact by international definition rather than measured, so the only rounding is whatever you apply to the final answer.
Kilometers per hour to Miles per hour conversion table
| Kilometers per hour | Miles per hour |
|---|---|
| 1 km/h | 0.62137 mph |
| 2 km/h | 1.2427 mph |
| 5 km/h | 3.1069 mph |
| 10 km/h | 6.2137 mph |
| 25 km/h | 15.5343 mph |
| 50 km/h | 31.0686 mph |
| 100 km/h | 62.1371 mph |
What is a kilometer per hour?
The standard speed unit for road traffic in most of the world, and the unit used on European and Canadian road signs.
What is a mile per hour?
Used for road speed in the United States and the United Kingdom. The UK is unusual in signing distance in miles while selling fuel in liters.
Frequently asked questions
How many miles per hour are in a kilometer per hour?
One kilometer per hour is 0.62137 miles per hour.
How do I convert kilometers per hour to miles per hour in my head?
Multiply by 6 and drop a digit. 100 km/h → 62 mph.
Is the conversion exact?
Yes. Both units are defined in terms of each other by international agreement, so the factor 0.62137 is exact rather than approximate.
How many kilometers per hour is 100 mph?
100 mph is 160.93 km/h.
Which countries use miles per hour?
The United States and the United Kingdom for road speed.
Is my data uploaded to convert it?
No. The arithmetic runs in your browser. Nothing is sent anywhere.