Speed Converter
Convert between kilometres per hour, miles per hour, metres per second, knots and feet per second.
0.621372
1 km/h=0.621372 mph
Common conversions
| Value | km/h → mph | mph → km/h | km/h → m/s | kn → km/h |
|---|---|---|---|---|
| 1 | 0.621372 | 1.6093 | 0.277778 | 1.852 |
| 5 | 3.1069 | 8.0467 | 1.3889 | 9.26 |
| 10 | 6.2137 | 16.0934 | 2.7778 | 18.52 |
| 20 | 12.4274 | 32.1869 | 5.5556 | 37.0399 |
| 30 | 18.6412 | 48.2803 | 8.3333 | 55.5599 |
| 50 | 31.0686 | 80.4671 | 13.8889 | 92.5998 |
| 60 | 37.2823 | 96.5606 | 16.6667 | 111.1198 |
| 80 | 49.7097 | 128.7474 | 22.2222 | 148.1598 |
| 100 | 62.1372 | 160.9343 | 27.7778 | 185.1997 |
| 120 | 74.5646 | 193.1211 | 33.3334 | 222.2396 |
Frequently asked questions
What is 1 kilometre per hour in mile per hour?
1 km/h = 0.621372 mph. Use the converter above to enter any value and get the precise conversion.
Which units does the speed category support?
5 units: metre per second, kilometre per hour, mile per hour, knot, foot per second.
Are the speed conversions accurate?
Yes — they use the official SI and BIPM definitions. Results are rounded to 4–6 significant figures.