Convert kilometers per hour to miles per hour
Enter a value in kilometers per hour to convert it to miles per hour.
kilometers per hour to miles per hour reference
| kilometers per hour | miles per hour |
|---|---|
| 1 km/h | 0.6214 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 |
The conversion factor
One kilometer per hour is 0.62137119 miles per hour. So to convert, multiply your figure in kilometers per hour by 0.62137119. To go the other way, multiply miles per hour by 1.609344, or use the miles per hour to kilometers per hour converter.
Doing it in your head
For a quick estimate, round the factor: roughly "divide by 2". Use the exact converter above when the number matters.
Where this conversion comes up
Driving abroad, running and cycling pace, wind speed, and vehicle specs.
See the common unit conversions cheat sheet for the factors worth memorising.
Related tools
Frequently asked questions
How many miles per hour are in a kilometer per hour?
1 kilometer per hour = 0.621371 miles per hour.
What is the formula to convert kilometers per hour to miles per hour?
Multiply the number of kilometers per hour by 0.62137119. To go back the other way, multiply miles per hour by 1.609344.
What is 10 kilometers per hour in miles per hour?
10 kilometers per hour = 6.2137 miles per hour. The reference table below lists more common values.
Is this converter accurate?
It uses the internationally defined conversion factors and computes at full floating-point precision, then rounds only the displayed result. For everyday purposes it is exact; for legal, engineering or scientific work, confirm the required number of significant figures.
Does it work offline?
Yes. The conversion runs in your browser with no server call, so it keeps working with no connection, and nothing you enter is uploaded.
Last reviewed: September 2026. Figures and formulas are checked against their published sources; see the site's data notes.