km/h to mph Converter
Convert km/h to mph instantly: 1 km/h = 0.621371 mph. Free converter with the formula, a reference table and FAQs — no sign-up.
| km/h | mph |
|---|
How to convert km/h to mph
Enter your value
Type the number of km/h you want to convert into the left box. The result in mph appears instantly in the right box. You can also type into the right box to convert in the other direction.
Use the swap button
Click the ⇄ Swap button to reverse the conversion — mph to km/h. Your current value carries across so you don't have to re-enter anything.
About km/h and mph
km/h and mph are common speed measurements.
Worked examples: km/h to mph
Multiply the km/h value by 0.621371 to get mph. A few quick examples:
- 5 km/h × 0.621371 = 3.10685 mph
- 25 km/h × 0.621371 = 15.5343 mph
- 250 km/h × 0.621371 = 155.343 mph
Related conversions
km/h to mph: speed limits and quick checks
Multiply km/h by 0.621371 to get mph. A rough mental shortcut is to take half and add a tenth.
| km/h | mph |
|---|---|
| 30 | 18.6 |
| 50 | 31.1 |
| 60 | 37.3 |
| 80 | 49.7 |
| 100 | 62.1 |
| 110 | 68.4 |
| 120 | 74.6 |
| 130 | 80.8 |
| km/h | mph |
|---|---|
| 1 | 0.6214 |
| 5 | 3.107 |
| 10 | 6.214 |
| 20 | 12.43 |
| 30 | 18.64 |
| 50 | 31.07 |
Frequently asked questions
How do I convert km/h to mph?
To convert km/h to mph, multiply by 0.621371. Or use the calculator above for instant results.
How many mph are in 1 km/h?
1 km/h equals 0.621371 mph.
Is the km/h to mph converter free?
Yes, the km/h to mph converter is completely free with no sign-up required, no downloads, and it works offline once the page has loaded.