Speed conversion
Convert MPH to KM/H
1 mile per hour equals 1.609 km/h. To convert mph to km/h, multiply the speed by 1.609344.
Miles per hour to kilometers per hour is the conversion for driving abroad, reading a foreign speedometer, and comparing car specs or running paces. Enter any mph value and the km/h 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 miles per hour to kilometers per hour
Formula
km/h = mph × 1.609344 mph = km/h ÷ 1.609344Because one mile is exactly 1.609344 kilometers, a speed in mph converts to km/h with the same factor — the conversion is exact.
| Miles per hour | Kilometers per hour |
|---|---|
| 5 mph | 8.047 km/h |
| 10 mph | 16.09 km/h |
| 20 mph | 32.19 km/h |
| 30 mph | 48.28 km/h city limit |
| 40 mph | 64.37 km/h |
| 55 mph | 88.51 km/h US highway |
| 60 mph | 96.56 km/h |
| 65 mph | 104.61 km/h US freeway |
| 70 mph | 112.65 km/h |
| 100 mph | 160.93 km/h |
Worked example
A rental car abroad shows speed in km/h but you think in mph. A 65 mph US freeway speed is 65 × 1.609344 ≈ 105 km/h. A 30 mph city limit is about 48 km/h, and 70 mph is roughly 113 km/h.
Shortcut. Quick estimate: multiply mph by 1.6. 60 mph ≈ 96 km/h (96.6 exactly). To roughly reverse it, take 60% of the km/h figure.
Good to know
MPH-to-km/h is a clean single multiplier, the same 1.609344 used for miles-to-kilometers. It's handy for matching foreign road signs and posted limits: 50 km/h ≈ 31 mph, 100 km/h ≈ 62 mph, 120 km/h ≈ 75 mph.
Frequently asked questions
How many km/h is 1 mph?
One mile per hour is 1.609 km/h. Multiply any mph figure by 1.609344 to get km/h.
What is 60 mph in km/h?
60 mph equals about 96.6 km/h. 70 mph is 112.7 km/h and 80 mph is 128.7 km/h.
How do I convert mph to km/h quickly?
Multiply by 1.6. A 50 mph speed is about 80 km/h (80.5 exactly).
What is 100 km/h in mph?
100 km/h is about 62.1 mph — divide km/h by 1.609344 to reverse the conversion.
Is mph faster than km/h?
For the same number, yes: 100 mph is faster than 100 km/h, because one mph (1.609 km/h) covers more ground than one km/h.