Kilometers per Hour to Miles per Hour
One kilometer per hour equals 0.621371 miles per hour.
Miles per Hour = kilometers per hour ÷ 1.609344
By Piero Nanni · Last checked
Kilometers per Hour to Miles per Hour Calculator
How to Convert Kilometers per Hour to Miles per Hour
Formula:
Miles per Hour = kilometers per hour ÷ 1.609344
Worked example:
80 kilometers per hour ÷ 1.609344 = 49.7097 miles per hour
Kilometers per Hour to Miles per Hour Conversion Table
| km/h | mph |
|---|---|
| 10 | 6.2137 |
| 15 | 9.3206 |
| 20 | 12.4274 |
| 25 | 15.5343 |
| 30 | 18.6411 |
| 40 | 24.8548 |
| 50 | 31.0686 |
| 60 | 37.2823 |
| 70 | 43.496 |
| 75 | 46.6028 |
| 80 | 49.7097 |
| 90 | 55.9234 |
| 100 | 62.1371 |
| 110 | 68.3508 |
| 120 | 74.5645 |
| 130 | 80.7783 |
| 150 | 93.2057 |
| 200 | 124.2742 |
About This Conversion
Kilometers per hour to miles per hour is the conversion drivers need when crossing between metric and imperial road systems. The factor is the same 1.609344 that relates the distances, because both units share the same hour.
The speed limits themselves reveal the rounding conventions each country chose. 50 km/h is 31 mph against a UK 30 mph limit, 100 km/h is 62 mph, and 120 km/h is 75 mph. None of the common metric limits converts to a round imperial number, which is why signs are set independently rather than converted.
Frequently Asked Questions
What is 100 km/h in mph?
100 km/h is 62.14 mph.
What is 50 km/h in mph?
50 km/h is 31.07 mph, close to the 30 mph urban limit used in the UK.
What is 130 km/h in mph?
130 km/h is 80.78 mph, the motorway limit in France in dry conditions.
How do I estimate km/h to mph while driving?
Take six tenths of the number. 80 km/h gives 48, against a true 49.7 mph.
Sources
Worth Knowing
Related Conversions
Converting the other way? Miles per Hour to Kilometers per Hour
Need a different unit? Open the full speed converter