Kilometer per Hour to Mile per Hour
1 km/h = 0.6213711922 mph
How to convert kilometer per hour to mile per hour
Enter the value in kilometer per hour (km/h) above and the equivalent in mile per hour (mph) updates as you type. This conversion comes up when driving abroad: speed limit signs in a unit your speedometer does not show prominently.
- A common highway limit: 100 km/h is about 62 mph → that is 62.137119 mph in mile per hour.
- City limit: 30 km/h is about 19 mph → that is 18.641136 mph in mile per hour.
Typical situations: understanding running paces quoted in minutes per mile vs per km; comparing internet speeds (Mbps) with download times people quote in MB/s; interpreting wind speeds in weather forecasts across systems.
You can also convert in the other direction: Mile per Hour to Kilometer per Hour
Kilometer per Hour to Mile per Hour conversion table
| Kilometer per Hour (km/h) | Mile per Hour (mph) |
|---|---|
| 1 | 0.621371 |
| 2 | 1.242742 |
| 5 | 3.106856 |
| 10 | 6.213712 |
| 25 | 15.53428 |
| 50 | 31.06856 |
| 100 | 62.137119 |
Watch out for
- UK road signs are in mph while fuel is sold in liters; mixed system
- Confusing km/h with mph in a 30-vs-50 context nearly doubles or halves the real speed
Frequently asked questions
How many miles per hour is 1 kilometer per hour?
1 kilometer per hour = 0.621371 miles per hour.
What is the formula to convert kilometer per hour to miles per hour?
The formula is: mph = km/h × 0.621371.
What is 10 kilometers per hour in miles per hour?
10 kilometers per hour = 6.213712 miles per hour.