Miles per hour to Kilometres per hour Converter
Convert miles per hour (mph) to kilometres per hour (km/h) instantly. Speed conversions come up with expressway limits in km/h, foreign car specs in mph and wind speeds reported in knots by the Meteorological Service.
Result
- Kilometres per hour
- 1.6093 km/h
How to use the miles per hour to kilometres per hour converter
- Enter the miles per hour (mph).
- The results update as you type, or press Calculate.
- Read the kilometres per hour first, then the supporting figures below it.
Formula
Kilometres per hour = miles per hour × 1.609344
Worked example
For example, with these inputs:
- Miles per hour (mph): 1
the calculator returns:
- Kilometres per hour: 1.6093 km/h
Miles per hour to Kilometres per hour table
| Miles per hour | Kilometres per hour |
|---|---|
| 1 mph | 1.6093 km/h |
| 2 mph | 3.2187 km/h |
| 5 mph | 8.0467 km/h |
| 10 mph | 16.0934 km/h |
| 20 mph | 32.1869 km/h |
| 25 mph | 40.2336 km/h |
| 50 mph | 80.4672 km/h |
| 100 mph | 160.9344 km/h |
| 250 mph | 402.336 km/h |
| 500 mph | 804.672 km/h |
| 1,000 mph | 1,609.34 km/h |
About this conversion
Speed conversions come up with expressway limits in km/h, foreign car specs in mph and wind speeds reported in knots by the Meteorological Service.
Many conversion factors are exact by definition. The inch has been defined as exactly 2.54 centimetres since 1959, and the pound as exactly 0.45359237 kilograms, so conversions involving them can be as precise as you need.
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
Frequently asked questions
How many kilometres per hour are in one miles per hour?
1 mph = 1.6093 km/h.
How do I convert mph to km/h?
Kilometres per hour = miles per hour × 1.609344.