1 mph equals 1.60934 km/h. To convert mph to km/h, multiply the value by 1.60934; divide by 1.60934 to convert back. Enter any number above and the result appears instantly — free and entirely in your browser.
How do you convert mph to km/h?
The conversion formula is km/h = mph × 1.60934. The conversion factor is fixed by definition, so the result is always exact.
mph to km/h conversion table
| mph | km/h |
|---|---|
| 10 mph | 16.0934 km/h |
| 30 mph | 48.2803 km/h |
| 50 mph | 80.4672 km/h |
| 80 mph | 128.748 km/h |
| 100 mph | 160.934 km/h |
| 130 mph | 209.215 km/h |
What is mph (mph)?
Miles per hour (mph) is the road-speed unit in the US and UK. One mph equals exactly 1.609344 km/h — a 70 mph motorway limit is about 113 km/h.
What is km/h (km/h)?
Kilometres per hour (km/h) is the everyday speed unit for road traffic in most of the world: speedometers, speed limits and weather reports all use it.
Why convert mph to km/h?
Road speeds are posted in km/h in most countries but in mph in the US and UK; shipping and aviation use knots, physics and wind data use metres per second. Converting between them is routine for travel, sailing and sport.
One knot is exactly 1.852 km/h — one international nautical mile (1,852 m, standardised in 1929) per hour. And 100 km/h equals 62.137 mph or 27.778 m/s.
How to convert mph to km/h
- Enter the value in mph into the left field of the converter.
- Read the result in km/h instantly in the right field — it updates automatically.
- Use the swap button to reverse the direction (km/h to mph).
The converter runs entirely in your browser: no uploads, no queue, no limits. You can even use it offline.