How do you convert km/h to mph?
Divide by 1.609344, or multiply by about 0.621371. 100 km/h is 62.14 mph and 50 km/h is 31.07 mph.
- 1 km/h
- 0.6214 mph
- 1 mph
- 1.6093 km/h
- 100 km/h
- 62.14 mph
Km/h to mph table
| Kilometers per hour (km/h) | Miles per hour (mph) |
|---|---|
| 1 | 0.6213712 |
| 2 | 1.242742 |
| 3 | 1.864114 |
| 4 | 2.485485 |
| 5 | 3.106856 |
| 6 | 3.728227 |
| 7 | 4.349598 |
| 8 | 4.97097 |
| 9 | 5.592341 |
| 10 | 6.213712 |
| Kilometers per hour (km/h) | Miles per hour (mph) |
|---|---|
| 12 | 7.456454 |
| 15 | 9.320568 |
| 20 | 12.42742 |
| 25 | 15.53428 |
| 30 | 18.64114 |
| 40 | 24.85485 |
| 50 | 31.06856 |
| 60 | 37.28227 |
| 75 | 46.60284 |
| 100 | 62.13712 |
Speed limits abroad
- 31 mph50 km/h, a typical town limit
- 62 mph100 km/h
- 75 mph120 km/h
- 81 mph130 km/h, a common motorway limit in Europe
Cars sold for the US or UK show miles per hour, and many have a small km/h scale or a display setting. When the speedometer only shows one unit, keep a margin: 80 km/h is 49.7 mph, so stay under 50.
Speed cameras in metric countries measure in km/h and fines are based on that figure, so a rough conversion in your head should always err on the slow side.
Where the factor comes from
The factor is exact because the mile is exactly 1.609344 km (NIST SP 811). The hour is the same on both sides, so km/h to mph is the same math as kilometers to miles.
For the reverse, see mph to km/h. Wind and sailing speeds are often in knots, covered on knots to mph.
Cycling and running speeds are often quoted in km/h, even in the US. A 30 km/h group ride is 18.6 mph, and a 12 km/h treadmill setting is 7.46 mph, about an 8-minute mile. Weather apps let you pick either unit for wind, so check the settings before comparing two forecasts.
The converter keeps every digit, so a value such as 87 km/h gives 54.06 mph; round only the final figure you plan to use.
Km/h to mph questions
What is 60 km/h in mph?
60 km/h is 37.28 mph.
Is 120 km/h faster than 70 mph?
Yes, slightly. 120 km/h is 74.56 mph.
How many km/h is 1 mph?
1 mph is exactly 1.609344 km/h.
How fast is 200 km/h in mph?
200 km/h is 124.27 mph.