MPH to KPH converter
1 mph = 1.609344 km/h
Multiply mph by 1.609 344 for km/h. 70 mph, the UK motorway limit, is 112.65 km/h.
60 mph = 96.56064 km/h
Formula: km/h = mph × 1.609344
60 mph in every speed unit
- metre per second
- kilometre per hour
- knot
- foot per second
How to convert miles per hour to kilometres per hour
km/h = mph × 1.609344
Example: 60 mph × 1.609344 = 96.56064 km/h.
mile per hour: 1 mph = 1609.344 m ÷ 3600 s = 0.447 04 m/s (NIST SP 811, App. B (1959 yard & pound agreement))
kilometre per hour: 1 km/h = 1000 m ÷ 3600 s = 1/3.6 m/s (BIPM SI Brochure)
Going the other way? Use the kph to mph converter.
Where the number 1.609344 comes from
Nothing is measured here. Every step below is a definition written into law or into the SI.
1 mph
MPH to KPH table
| miles per hour (mph) | kilometres per hour (km/h) |
|---|---|
| 5 | 8.04672 |
| 10 | 16.09344 |
| 15 | 24.14016 |
| 20 | 32.18688 |
| 25 | 40.2336 |
| 30 | 48.28032 |
| 35 | 56.32704 |
| 40 | 64.37376 |
| 45 | 72.42048 |
| 50 | 80.4672 |
| 55 | 88.51392 |
| 60 | 96.56064 |
| 65 | 104.6074 |
| 70 | 112.6541 |
| 75 | 120.7008 |
| 80 | 128.7475 |
| 90 | 144.841 |
| 100 | 160.9344 |
| 120 | 193.1213 |
| 150 | 241.4016 |
| 200 | 321.8688 |
Questions
How many kilometres per hour are in 1 mile per hour?
1 mph = 1.609344 km/h.
What is the formula to convert miles per hour to kilometres per hour?
km/h = mph × 1.609344. 1 mph = 1609.344 m ÷ 3600 s = 0.447 04 m/s; 1 km/h = 1000 m ÷ 3600 s = 1/3.6 m/s.
Is this conversion exact?
Yes. Both units are defined exactly (NIST SP 811, App. B (1959 yard & pound agreement); BIPM SI Brochure), so the factor is exact and results are only rounded for display.
What is 60 mph in km/h?
60 mph = 96.56064 km/h.