Common
Speed Converter
Road, air, sea and science speeds: km/h, mph, knots, Mach and the speed of light.
That is below absolute zero (−273.15 °C), which isn’t physically possible.
1 Kilometer per hour = 0.6213711922 Miles per hour
Formula: divide the speed value by 1.609344
1 km/h in every speed unit
Tap a row to convert to that unit.
How to convert speed units
Road, air, sea and science speeds: km/h, mph, knots, Mach and the speed of light. Every conversion goes through one base unit, the meter per second, using exact factors, so results don’t drift.
Kilometers per hour to miles per hour (km/h to mph)
To convert kilometers per hour to miles per hour, divide by 1.609344. 1 kilometer per hour = 0.6213712 miles per hour.
| km/h | mph |
|---|---|
| 1 km/h | 0.6213712 mph |
| 2 km/h | 1.242742 mph |
| 5 km/h | 3.106856 mph |
| 10 km/h | 6.213712 mph |
| 20 km/h | 12.42742 mph |
| 50 km/h | 31.06856 mph |
| 100 km/h | 62.13712 mph |
Miles per hour to kilometers per hour (mph to km/h)
To convert miles per hour to kilometers per hour, multiply by 1.609344. 1 mile per hour = 1.609344 kilometers per hour.
| mph | km/h |
|---|---|
| 1 mph | 1.609344 km/h |
| 2 mph | 3.218688 km/h |
| 5 mph | 8.04672 km/h |
| 10 mph | 16.09344 km/h |
| 20 mph | 32.18688 km/h |
| 50 mph | 80.4672 km/h |
| 100 mph | 160.9344 km/h |
Meters per second to kilometers per hour (m/s to km/h)
To convert meters per second to kilometers per hour, multiply by 3.6. 1 meter per second = 3.6 kilometers per hour.
Kilometers per hour to meters per second (km/h to m/s)
To convert kilometers per hour to meters per second, divide by 3.6. 1 kilometer per hour = 0.2777778 meters per second.