MPH to KM/H Converter
Convert miles per hour to kilometres per hour in your browser, with a full reference table and the formula behind it. Free, instant, no sign-up.
How to convert miles per hour to kilometres per hour
kilometres per hour = miles per hour × 1.6093
One miles per hour is 1.6093 kilometres per hour, so any conversion is a single multiplication. To go the other way, divide by 1.6093 instead. The converter above is already set to miles per hour and kilometres per hour, so you can type any value and read the answer straight away.
MPH to KM/H conversion table
Common values, worked out in advance:
| Miles per hour (mph) | Kilometres per hour (km/h) |
|---|---|
| 10 mph | 16.0934 km/h |
| 20 mph | 32.1869 km/h |
| 30 mph | 48.2803 km/h |
| 40 mph | 64.3738 km/h |
| 50 mph | 80.4672 km/h |
| 60 mph | 96.5606 km/h |
| 80 mph | 128.7475 km/h |
| 100 mph | 160.9344 km/h |
| 120 mph | 193.1213 km/h |
| 140 mph | 225.3082 km/h |
The quick mental version
For a rough answer without a calculator, remember that 1 km/h is about 0.621371 mph. That is usually close enough for shopping, travel and DIY, and the converter above gives you the exact figure when it matters.
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Frequently asked questions
How many kilometres per hour are in 1 mph?
One mph is 1.6093 km/h. The table above covers the values people look up most often.
What is the formula to convert miles per hour to kilometres per hour?
kilometres per hour = miles per hour × 1.6093. One miles per hour is 1.6093 kilometres per hour, so any conversion is a single multiplication. To go the other way, divide by 1.6093 instead.
Is this mph to km/h converter accurate?
Yes. It uses the exact internationally defined conversion factors and calculates in your browser, so nothing is rounded until the result is displayed.
Can I convert kilometres per hour back to miles per hour here?
Yes. Use the swap button in the converter to reverse the direction, or pick any other pair of units from the two dropdowns.