About mph to km/h
Convert US and UK speed limits and car top speeds to km/h.
To convert, multiply the value in miles per hour by 1.609344. For example, 55 mph = 88.5139 km/h.
Miles per hour: miles traveled in one hour, exactly 1.609344 km/h. Kilometers per hour: kilometers traveled in one hour.
Miles per hour to kilometers per hour conversion table
Formula: km/h = mph × 1.609344
| Miles per hour | Kilometers per hour |
|---|---|
| 5 mph | 8.04672 km/h |
| 10 mph | 16.0934 km/h |
| 15 mph | 24.1402 km/h |
| 20 mph | 32.1869 km/h |
| 25 mph | 40.2336 km/h |
| 30 mph | 48.2803 km/h |
| 40 mph | 64.3738 km/h |
| 50 mph | 80.4672 km/h |
| 55 mph | 88.5139 km/h |
| 60 mph | 96.5606 km/h |
| 65 mph | 104.607 km/h |
| 70 mph | 112.654 km/h |
| 75 mph | 120.701 km/h |
| 80 mph | 128.748 km/h |
| 100 mph | 160.934 km/h |
| 150 mph | 241.402 km/h |
Values rounded to 6 significant figures.
How to do it
- 1
Type a value in miles per hour in the converter above (it is preset to mph → km/h).
- 2
Read the result instantly; tap Swap units to convert the other way.
- 3
Use the table for common values or the formula km/h = mph × 1.609344 to convert by hand.