Miles per hour to km/h converter
1 Miles per hour (mph) = 1.609344 Kilometres per hour (km/h)
How to convert mph to km/h
One mile is exactly 1.609344 km, so to convert mph to km/h you multiply by 1.609344, and to convert km/h to mph you divide by it (or multiply by 0.6214). A quick mental shortcut: multiply mph by 1.6, or take km/h, halve it and add a quarter of that half (100 km/h → 50 + 12.5 ≈ 62 mph).
Useful real-world numbers: the UK motorway limit of 70 mph is 112.7 km/h, and South Africa’s 120 km/h freeway limit is 74.6 mph. Speedometers in the UK and US show mph first; most other countries use km/h. Wind speeds and boats often use knots: 1 knot is 1.852 km/h, about 1.15 mph.
mph to km/h chart
| Miles per hour (mph) | Kilometres per hour (km/h) |
|---|---|
| 10 | 16.09344 |
| 20 | 32.18688 |
| 30 | 48.28032 |
| 40 | 64.37376 |
| 50 | 80.4672 |
| 60 | 96.56064 |
| 70 | 112.6541 |
| 80 | 128.7475 |
| 100 | 160.9344 |
| 120 | 193.1213 |
| 150 | 241.4016 |
| 200 | 321.8688 |
Frequently asked questions
How many km/h is 1 mph?
1 mile per hour is exactly 1.609344 kilometres per hour.
What is 100 km/h in mph?
100 km/h is 62.14 mph.
Is kph the same as km/h?
Yes. Kph, km/h and kmh all mean kilometres per hour; km/h is the official way to write it.
How fast is 60 mph in km/h?
60 mph is 96.56 km/h, which is why it is often rounded to “about 100 km/h”.