How to use Miles per Hour to Kilometers per Hour
Type a value in miles per hour and the kilometers per hour figure appears straight away. The conversion table further down lists common values.
The formula
km/h = mph × 1.609344
Examples
- 1 miles per hour to kilometers per hour
1.609344 km/h
- 10 miles per hour to kilometers per hour
16.09344 km/h
- 250 miles per hour to kilometers per hour
402.336 km/h
Miles per Hour to Kilometers per Hour conversion table
| Miles per Hour | Kilometers per Hour |
|---|---|
| 1 | 1.6093 km/h |
| 2 | 3.2187 km/h |
| 3 | 4.828 km/h |
| 4 | 6.4374 km/h |
| 5 | 8.0467 km/h |
| 6 | 9.6561 km/h |
| 7 | 11.2654 km/h |
| 8 | 12.8748 km/h |
| 9 | 14.4841 km/h |
| 10 | 16.0934 km/h |
| 15 | 24.1402 km/h |
| 20 | 32.1869 km/h |
| 25 | 40.2336 km/h |
| 30 | 48.2803 km/h |
| 40 | 64.3738 km/h |
| 50 | 80.4672 km/h |
| 75 | 120.7008 km/h |
| 100 | 160.9344 km/h |
| 250 | 402.336 km/h |
| 500 | 804.672 km/h |
| 1,000 | 1,609.344 km/h |
Limitations and assumptions
Review inputs, units and assumptions before relying on the result. Detailed content, accessibility and edge-case review remains ongoing.
Frequently asked questions
How many kilometers per hour are in one mile per hour?
One mile per hour equals 1.609344 km/h. The formula is km/h = mph × 1.609344.
How do I convert miles per hour to kilometers per hour?
Use km/h = mph × 1.609344. For example, 10 miles per hour gives 16.09344 km/h. Enter your own value above and the converter does the arithmetic for you.
How do I convert kilometers per hour back to miles per hour?
Use the Kilometers per Hour to Miles per Hour converter, or invert the factor by dividing instead of multiplying.
Is this conversion exact?
Speed conversions chain a distance factor and a time factor (1 mile = 1.609344 km, 1 hour = 3,600 s), and a knot is one nautical mile per hour.