Miles per hour to kilometers per hour (mph to km/h)
Multiply miles per hour by 1.609 to get kilometers per hour. The UK motorway limit of 70 mph is 112.7 km/h, and a US highway 55 mph is 88.5 km/h. Add 60 percent as a mental shortcut.
Kilometers per hour (km/h)
km/h = mph x 1.60934
Going the other way? Use the km/h to mph converter.
mph to km/h conversion table
| Miles per hour (mph) | Kilometers per hour (km/h) |
|---|---|
| 10 | 16.1 |
| 20 | 32.2 |
| 30 | 48.3 |
| 40 | 64.4 |
| 50 | 80.5 |
| 55 | 88.5 |
| 60 | 96.6 |
| 70 | 112.7 |
| 80 | 128.7 |
| 100 | 160.9 |
How to convert miles per hour to kilometers per hour
The formula is km/h = mph x 1.60934. Type any value into the converter above for
an exact result, or use the table for the most common conversions. For other units, the
full speed converter handles every combination, and
the unit converter covers length, weight, temperature,
speed, area, volume and data in one place.
Frequently asked questions
How many kilometers per hour are in 1 mile per hour?
1 mph = 1.60934 km/h. The formula is km/h = mph x 1.60934; the converter applies it to whatever you type and rounds only for display.
What is 55 mph in km/h?
55 mph = 88.5 km/h, using km/h = mph x 1.60934.
How do I convert kilometers per hour back to miles per hour?
Use mph = km/h x 0.621371. For example, 110 km/h = 68.4 mph. The km/h to mph converter does this for you.