How to convert kilometres per hour to miles per hour
Enter a speed in kilometres per hour and read it in miles per hour. The result updates as you type, and you can swap the units or copy the answer.
One kilometre per hour is 0.621371192237 mph, which follows from the mile being exactly 1.609344 km.
1 kilometre per hour = 0.621371192237 miles per hour
Formula: miles per hour = kilometres per hour × 0.621371192237
- Multiply the speed in km/h by 0.621371192237.
- For a quick estimate, multiply by 5 and divide by 8 (which is 0.625). It is within about 0.6% of the exact value. Multiplying by 0.6 is quicker but runs about 3.4% low.
Common conversions
| Kilometres per hour (km/h) | Miles per hour (mph) |
|---|---|
| 10 km/h | 6.21371 mph |
| 20 km/h | 12.4274 mph |
| 30 km/h | 18.6411 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 |
| 110 km/h | 68.3508 mph |
| 120 km/h | 74.5645 mph |
| 130 km/h | 80.7783 mph |
Values are computed by the same converter as above, rounded to six significant digits. Need the other direction? See Miles per Hour to Kilometres per Hour.
Worked examples
A town speed limit
A 50 km/h limit, common in European towns, is 50 km/h = 31.1 mph.
A rural road
100 km/h is 100 km/h = 62.1 mph.
A motorway
A 130 km/h motorway limit is 130 km/h = 80.8 mph, and 130 km/h is also the recommended maximum on German autobahns without a posted limit.
Things to keep in mind
- Speedometers on cars in the UK and US show miles per hour, sometimes with kilometres per hour in smaller print.
- Speeds in km/h are written kph, kmph or km/h. They all mean the same unit.