How to convert: mph → km/h
Convert mph directly to km/h. This page uses a fixed relationship between the two units and performs the calculation instantly in your browser.
mph and km/h measure the same quantity: speed. Converting between them makes it easier to compare a measurement or use it in another unit system.
Worked examples
mph and km/h measure the same quantity: speed. Converting between them makes it easier to compare a measurement or use it in another unit system.
mph and km/h measure the same quantity: speed. Converting between them makes it easier to compare a measurement or use it in another unit system.
mph and km/h measure the same quantity: speed. Converting between them makes it easier to compare a measurement or use it in another unit system.
Conversion table
| mph | km/h |
|---|---|
| 1 mph | 1.60934 km/h |
| 5 mph | 8.04672 km/h |
| 10 mph | 16.0934 km/h |
| 20 mph | 32.1869 km/h |
| 50 mph | 80.4672 km/h |
| 100 mph | 160.934 km/h |
Why this conversion is useful
Speed links distance to time. Conversions become useful when moving between road, scientific, maritime and aviation contexts. Kilometres per hour are common on roads, metres per second in physics, miles per hour in several English-speaking countries, and knots in navigation.