KPH to MPH: Kilometers per Hour to Miles per Hour
Kph to mph for speed limits, using the numbers you'll see on road signs.
Enter a number.
The formula
km/h = mph × 1.609344 (exact)
Exact in one direction only, since the mile is defined in terms of the meter.
Speed limit table
| km/h | mph | m/s | Typical context |
|---|---|---|---|
| 20 km/h | 12.4 | 5.6 | shared zone |
| 30 km/h | 18.6 | 8.3 | urban |
| 50 km/h | 31.1 | 13.9 | urban |
| 60 km/h | 37.3 | 16.7 | |
| 70 km/h | 43.5 | 19.4 | |
| 80 km/h | 49.7 | 22.2 | rural |
| 90 km/h | 55.9 | 25.0 | |
| 100 km/h | 62.1 | 27.8 | motorway |
| 110 km/h | 68.4 | 30.6 | motorway |
| 120 km/h | 74.6 | 33.3 | motorway |
| 130 km/h | 80.8 | 36.1 | motorway |
Driving abroad
Most rental cars show both scales on the speedometer, with one as the outer ring and the other inside it. Check which ring is which before you rely on it, since the layout differs by market.
Speed limits are posted in the local unit and enforced in it, so a converted figure is for your understanding rather than a defence. The common European limits of 50, 80, 100 and 130 km/h come out as roughly 31, 50, 62 and 81 mph.
Common questions
What is 100 kph in mph?
100 kilometers per hour is 62.1 miles per hour. The mile is exactly 1,609.344 meters, so the factor is 0.6213712. The rough mental version, multiplying by 0.6, gives 60 and always errs slightly slow rather than fast.
What is 50 kph in mph?
50 kilometers per hour is 31.1 miles per hour. It is the most common urban speed limit outside the United States.
How do I convert kph to mph in my head?
Multiply by 6 and drop a digit. 80 times 6 is 480, so about 48 mph against the true 49.7. Good enough to read a road sign.
Is the conversion factor exact?
No. The mile is defined as exactly 1,609.344 meters, so miles to kilometers is exact, and the kilometers to miles figure of 0.62137119 is a rounded reciprocal.
Related converters and guides
Sources
- NIST Guide to the SI, Appendix B: Conversion Factors. National Institute of Standards and Technology. Source for every conversion factor on this page, and for which factors are exact rather than rounded.