Kilometers per hour to Miles per hour Converter
Convert kilometers per hour to miles per hour instantly. 1 km/h = 0.621371 mph. Free two-way converter with the formula and a quick reference table.
How to convert kilometers per hour to miles per hour
miles per hour = kilometers per hour × 0.621371
One kilometer per hour equals 0.621371 miles per hour, so to convert kilometers per hour to miles per hour you multiply by 0.621371. Going the other way, one mile per hour is 1.6093 kilometers per hour. Both units measure speed, so the conversion is an exact ratio that never changes.
10 kilometers per hour = 6.2137 miles per hour. Multiply your kilometer per hour figure by the factor above (or just type it into the box) to convert any amount.
Need the other direction? miles per hour to kilometers per hour
kilometers per hour to miles per hour table
| kilometers per hour (km/h) | miles per hour (mph) |
|---|---|
| 1 | 0.621371 |
| 2 | 1.2427 |
| 3 | 1.8641 |
| 5 | 3.1069 |
| 10 | 6.2137 |
| 20 | 12.4274 |
| 25 | 15.5343 |
| 50 | 31.0686 |
| 100 | 62.1371 |
| 250 | 155.34 |
| 500 | 310.69 |
| 1,000 | 621.37 |
Frequently asked questions
How many miles per hour are in a kilometer per hour?
One kilometer per hour equals 0.621371 miles per hour. So to convert, multiply the number of kilometers per hour by 0.621371.
How do I convert kilometers per hour to miles per hour?
Multiply by 0.621371, or simply enter the value in the converter above — it does the math instantly and works both ways.
Is this conversion exact?
Yes — both units measure the same quantity, so the ratio is fixed and this uses the standard internationally-agreed factor.