EngiRef / Speed conversion
Convert Miles/hour to Kilometers/hour (mph to km/h)
1 mph = 1.609344 km/h. Convert miles/hour to kilometers/hour with the exact factor, a common-values table and a free converter.
Conversion factor
km/h = mph × 1.609344
1 mph = 1.609344 km/h
Multiply by 1.609344 km/h to go from miles/hour to kilometers/hour, or divide by it to come back. The factor and every value below are computed by the same converter that runs at /convert, so this page and the tool cannot disagree.
mph to km/h table
| Miles/hour (mph) | Kilometers/hour (km/h) |
|---|---|
| 1 mph | 1.609344 km/h |
| 2 mph | 3.218688 km/h |
| 5 mph | 8.04672 km/h |
| 10 mph | 16.09344 km/h |
| 20 mph | 32.18688 km/h |
| 50 mph | 80.4672 km/h |
| 100 mph | 160.9344 km/h |
Every figure is computed at build time by the site’s own converter from the speed unit registry. For a value that is not listed, put it into the interactive converter.
Frequently asked questions
How many kilometers/hour are in one mile/hour?
One mile/hour is 1.609344 km/h, so 100 mph is 160.9344 km/h.
What is the formula to convert miles/hour to kilometers/hour?
km/h = mph × 1.609344. Multiply the value in miles/hour by 1.609344 to get kilometers/hour.
How do I convert kilometers/hour back to miles/hour?
mph = km/h × 0.621371192, so 1 km/h is 0.621371192 mph. The km/h to mph page carries the same table in that direction.