Handy Units
km/h to mphkm/h → mph
1 km/h = 0.621371 mph · 1 mph = 1.60934 km/h
Formula
mph = km/h ÷ 1.609344
Example: 80 km/h = 80 ÷ 1.609344 = 49.7097 mph
These units differ only by a fixed factor: multiply by it to convert, divide to go back. The factors are exact international definitions (for example 1 inch = 2.54 cm exactly); results are rounded only for display.
km/h and mph chart
| km/h (km/h) | mph (mph) |
|---|---|
| 10 km/h | 6.21371 mph |
| 20 km/h | 12.4274 mph |
| 30 km/h | 18.6411 mph |
| 40 km/h | 24.8548 mph |
| 50 km/h | 31.0686 mph |
| 60 km/h | 37.2823 mph |
| 80 km/h | 49.7097 mph |
| 100 km/h | 62.1371 mph |
| 120 km/h | 74.5645 mph |
| 150 km/h | 93.2057 mph |
| 200 km/h | 124.274 mph |
| 300 km/h | 186.411 mph |
| mph (mph) | km/h (km/h) |
|---|---|
| 10 mph | 16.0934 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 |
| 80 mph | 128.748 km/h |
| 100 mph | 160.934 km/h |
About these units
Kilometers per hour (km/h)Kilometers per hour: the unit for speed and speed limits in most countries.
Miles per hour (mph)Miles per hour, used in the US and UK: 1 mph ≈ 1.609 km/h.
Questions
How many mph are in 1 km/h?
1 km/h = 0.621371 mph.
How many km/h are in 1 mph?
1 mph = 1.60934 km/h.
What is 120 km/h in mph?
About 74.6 mph (120 ÷ 1.609344).