How to convert kilometers per hour to miles per hour
Kilometers per Hour and Miles per Hour both measure speed, so converting is a single multiplication. One km/h equals 0.621372 mph, so you multiply your kilometers per hour value by 0.621372.
Formula: miles per hour = kilometers per hour × 0.621372. For example, 10 km/h = 6.213717 mph.
Kilometers per Hour to Miles per Hour conversion table
| Kilometers per Hour (km/h) | Miles per Hour (mph) |
|---|---|
| 1 | 0.621372 |
| 2 | 1.242743 |
| 5 | 3.106858 |
| 10 | 6.213717 |
| 25 | 15.534292 |
| 50 | 31.068584 |
| 100 | 62.137169 |
| 1,000 | 621.371689 |
Kilometers per Hour and Miles per Hour explained
Kilometers per Hour (km/h): The metric speed unit for vehicles in most of the world.
Miles per Hour (mph): The imperial speed unit for vehicles in the US and UK.
When you'd convert kilometers per hour to miles per hour
You'll convert kilometers per hour to miles per hour whenever a measurement is given in one unit but you need it in the other — comparing kilometers per hour and miles per hour figures across regions, following a recipe or spec, or double-checking a number. Because 1 km/h is exactly 0.621372 mph, the result is precise every time.
Frequently asked questions
How many miles per hour are in a kilometers per hour?
One km/h equals 0.621372 mph. Multiply your kilometers per hour figure by 0.621372 to get miles per hour.
What is the formula to convert kilometers per hour to miles per hour?
miles per hour = kilometers per hour × 0.621372. The factor 0.621372 is exact.
What is 2 kilometers per hour in miles per hour?
2 km/h = 1.242743 mph. You can enter any value in the converter above to get an instant result.
Is this Kilometers per Hour to Miles per Hour converter accurate?
Yes. It uses the standard conversion factor (1 km/h = 0.621372 mph) defined by BIPM — SI Brochure (derived units), so results are exact to several decimal places.