Kilometers per hour to Miles per hour Converter
Convert Kilometers per hour (km/h) to Miles per hour (mph). Results update as you type, with a conversion table and the formula below.
1 km/h =
0.621371 mph
km/h to mph conversion table
| km/h | mph |
|---|---|
| 1 | 0.621371 |
| 2 | 1.2427 |
| 3 | 1.8641 |
| 4 | 2.4855 |
| 5 | 3.1069 |
| 6 | 3.7282 |
| 7 | 4.3496 |
| 8 | 4.971 |
| 9 | 5.5923 |
| 10 | 6.2137 |
| 15 | 9.3206 |
| km/h | mph |
|---|---|
| 20 | 12.4274 |
| 25 | 15.5343 |
| 30 | 18.6411 |
| 40 | 24.8548 |
| 50 | 31.0686 |
| 60 | 37.2823 |
| 70 | 43.496 |
| 80 | 49.7097 |
| 90 | 55.9234 |
| 100 | 62.1371 |
How to use
- Type the km/h value to convert.
- The result appears instantly in mph; the swap button reverses direction.
- For common values, check the conversion table below.
Frequently asked questions
How many mph is 1 km/h?+
1 km/h = 0.621371 mph. The table below lists the values you'll reach for most often.
How accurate are the results?+
The math uses internationally standardized definitions; only the display is rounded to significant digits. Accurate enough for school, work and daily life.
How do I convert mph back to km/h?+
Hit the swap arrows in the middle of the converter above — the direction flips and your value is kept.
Is it really free?+
Yes. No sign-up, no install, no usage limits. The site is ad-supported.
Unit guide
The formula
1 km/h equals 0.621371 mph — multiply a km/h value by 0.621371 to get mph. Example: 5 km/h × 0.621371 = 3.1069 mph.
Going the other way, 1 mph = 1.6093 km/h — multiply by 1.6093, or hit the swap button on the converter above.
When is this conversion needed?
Useful for speed-limit signs abroad, storm wind speeds (knots) and running or cycling pace math.