How to convert MPH to km/h
To convert mph to km/h, multiply by 1.609344. For example, 5 mph × 1.609344 = 8.04672 kmh.
MPH to km/h conversion table
| MPH (mph) | km/h (kmh) |
|---|---|
| 0.25 | 0.402336 |
| 0.5 | 0.804672 |
| 1 | 1.609344 |
| 2 | 3.218688 |
| 3 | 4.828032 |
| 5 | 8.04672 |
| 10 | 16.09344 |
| 15 | 24.14016 |
| 20 | 32.18688 |
| 25 | 40.2336 |
| 50 | 80.4672 |
| 75 | 120.7008 |
| 100 | 160.9344 |
| 250 | 402.336 |
| 500 | 804.672 |
| 1000 | 1609.344 |
About the units
Miles per hour (mph) — miles per hour, the speed unit on US and UK road signs.
Kilometers per hour (kmh) — kilometers per hour, the speed unit used on roads in most of the world.
Frequently asked questions
How many km/h are in one mph?
One mph equals 1.609344 km/h.
What is the formula to convert mph to km/h?
Multiply the value in mph by 1.609344. For example, 10 mph × 1.609344 = 16.09344 kmh.
How do I convert km/h back to mph?
Divide by 1.609344 — or multiply by 0.62137119. You can also type directly in the second box of the converter above.
Is this converter accurate?
Yes. It uses the internationally defined conversion factors (for example, 1 inch = 2.54 cm exactly and 1 pound = 0.45359237 kg exactly) and shows up to 10 significant digits.
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