The short answer
- 1 km/h ≈ 0.6213712 mph
- 1 mph = 1.609344 km/h
Worked example100 km/h ÷ 1.609344 = 62.13712 mph
UNIT CONVERSION
← Speed converterKilometres per hour to miles per hour
To convert kilometres per hour to miles per hour, divide the number of kilometres per hour by 1.609344.
What the units mean
Kilometre per hour. Kilometres per hour. 1 km/h is exactly 1/3.6 metres per second.
Mile per hour. Miles per hour. The international mile is exactly 1,609.344 metres, so 1 mph is exactly 0.44704 metres per second.
Kilometres per hour to miles per hour table
| Kilometres per hour (km/h) | Miles per hour (mph) |
|---|---|
| 5 | 3.106856 |
| 10 | 6.213712 |
| 20 | 12.42742 |
| 30 | 18.64114 |
| 40 | 24.85485 |
| 50 | 31.06856 |
| 60 | 37.28227 |
| 70 | 43.49598 |
| 80 | 49.7097 |
| 90 | 55.92341 |
| 100 | 62.13712 |
| 110 | 68.35083 |
| 120 | 74.56454 |
| 130 | 80.77825 |
| 140 | 86.99197 |
| 150 | 93.20568 |
| 160 | 99.41939 |
| 200 | 124.2742 |
| 250 | 155.3428 |
| 300 | 186.4114 |
Values are rounded to 7 significant figures.
Common questions
How do I convert kilometres per hour to miles per hour?
Divide the number of kilometres per hour by 1.609344. For example, 100 km/h ÷ 1.609344 = 62.13712 mph.
How many miles per hour are in one kilometre per hour?
One kilometre per hour is about 0.6213712 miles per hour.
Is this conversion exact?
Yes. Both units have exact legal definitions, so the factor is exact. Values on this page are rounded to 7 significant figures.