Speed converter
Speed converter
Convert driving, running, cycling, wind, and marine speeds instantly.
Quick conversion table
| Mile per hour | Kilometer per hour |
|---|---|
| 1 mph | 1.6093 kph |
| 5 mph | 8.0467 kph |
| 10 mph | 16.0934 kph |
| 25 mph | 40.2336 kph |
| 50 mph | 80.4672 kph |
| 100 mph | 160.9344 kph |
Useful notes
Road and weather
Mph and kph cover driving, while knots help with wind and marine reports.
Engineering speed
Meters per second and feet per second keep physics and technical references accessible.
Frequently asked questions
How do I use the speed converter?
Enter a value, choose miles per hour as the starting unit, then choose kilometers per hour as the converted unit. The result updates as you type.
Can I type in either conversion field?
Yes. The converter is bidirectional, so editing either field recalculates the other side.
Can I share a conversion result?
Yes. Use the copy link button after entering your values. The current units and value are included in the page URL.
Will my last conversion be remembered?
Yes. The tool saves the last value and unit choices in this browser, and restores them when you come back.
How precise are the results?
Speed results use standard distance-over-time factors for road, weather, marine, and engineering units.