Speed conversion
Convert KM/H to MPH
1 km/h equals 0.6214 mph. To convert km/h to mph, multiply the speed by 0.6214 (or divide by 1.609344).
Kilometers per hour to miles per hour is the conversion for understanding a foreign speed limit, a car's metric top speed, or a treadmill set in km/h. Enter any km/h value and the mph appears instantly, with the exact factor shown.
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Computed at full precision in your browser; the result is rounded for display.
How to convert kilometers per hour to miles per hour
Formula
mph = km/h × 0.6214 km/h = mph × 1.609344One mile per hour is exactly 1.609344 km/h, so one km/h is 1 ÷ 1.609344 = 0.621371… mph.
| Kilometers per hour | Miles per hour |
|---|---|
| 10 km/h | 6.214 mph |
| 30 km/h | 18.64 mph city zone |
| 50 km/h | 31.07 mph urban limit |
| 60 km/h | 37.28 mph |
| 80 km/h | 49.71 mph |
| 90 km/h | 55.92 mph |
| 100 km/h | 62.14 mph highway |
| 110 km/h | 68.35 mph |
| 120 km/h | 74.56 mph motorway |
| 130 km/h | 80.78 mph |
Worked example
A motorway sign abroad reads 120 km/h and you think in mph. Multiply 120 × 0.6214 to get about 74.6 mph. A 50 km/h urban limit is roughly 31 mph, and 100 km/h is about 62 mph.
Shortcut. Quick estimate: take 60% of the km/h figure. 100 km/h ≈ 60 mph (62 exactly); 130 km/h ≈ 78 mph.
Good to know
KM/H-to-mph is a single multiplier, the inverse of the mph-to-km/h factor. Useful for foreign driving: most European urban limits of 50 km/h are about 31 mph, rural 90 km/h roads about 56 mph, and motorways of 120–130 km/h about 75–81 mph.
Frequently asked questions
How many mph is 1 km/h?
One km/h is 0.6214 mph. Multiply any km/h figure by 0.6214 to get mph.
What is 100 km/h in mph?
100 km/h equals about 62.1 mph. 120 km/h is 74.6 mph and 130 km/h is 80.8 mph.
How do I convert km/h to mph in my head?
Take roughly 60% of the number. 80 km/h is about 48 mph (49.7 exactly).
What is 60 mph in km/h?
60 mph is about 96.6 km/h — multiply mph by 1.609344 to reverse the conversion.
Why are foreign speed limits in km/h?
Most countries outside the US and UK use the metric system, so road signs post limits in km/h. Converting to mph helps US drivers judge their speed abroad.