Miles per hour to Kilometres per hour
Convert miles per hour (mph) to kilometres per hour (km/h) instantly — with formula and reference table.
Quick answer: 1 mph = 1.609344 km/h. To convert miles per hour to kilometres per hour, multiply by mph × 1.609344.
Converting miles per hour to kilometres per hour
This converter changes a value in miles per hour (mph) into kilometres per hour (km/h). One miles per hour equals 1.609344 km/h. Speed in mph converts to km/h with the same factor as miles to kilometres (1.609344), since both are distance-over-time. The conversion runs entirely in your browser — enter a value and the result updates instantly, in either direction.
Formula
km/h = mph × 1.609344
Example
Convert 10 mph to km/h: 10 × 1.609344 = 16.09344 km/h.
Miles per hour to Kilometres per hour conversion table
| Miles per hour (mph) | Kilometres per hour (km/h) |
|---|---|
| 1 mph | 1.609344 km/h |
| 2 mph | 3.218688 km/h |
| 3 mph | 4.828032 km/h |
| 5 mph | 8.04672 km/h |
| 10 mph | 16.09344 km/h |
| 20 mph | 32.18688 km/h |
| 25 mph | 40.2336 km/h |
| 50 mph | 80.4672 km/h |
| 100 mph | 160.9344 km/h |
How to use this converter
- Enter a value in the miles per hour (mph) field.
- Read the converted value in kilometres per hour (km/h) below.
- Type into the km/h field instead to convert in reverse, or use the swap button.
Frequently asked questions
How do I convert mph to km/h?
Multiply the speed in mph by 1.609344. 60 mph = 96.56 km/h.
What is 70 mph in km/h?
70 × 1.609344 = 112.65 km/h.
What is a typical highway speed?
US highways are often 65–70 mph (105–113 km/h); European motorways are often 120–130 km/h (75–81 mph).