1 metre per second = 3.6 kilometres per hour
Multiply by 3.6. Metres per second is the physics unit and the meteorological one; km/h is the civil one, and 3.6 is the only bridge you need.
Formula km/h = m/s × 3.6
Type in either field — the other updates on every keystroke. Need other units? Open the full speed converter.
| Metre per second | Kilometre per hour |
|---|---|
| 1 m/s | 3.6 km/h |
| 2 m/s | 7.2 km/h |
| 3 m/s | 10.8 km/h |
| 4 m/s | 14.4 km/h |
| 5 m/s | 18 km/h |
| 10 m/s | 36 km/h |
| 15 m/s | 54 km/h |
| 20 m/s | 72 km/h |
| 25 m/s | 90 km/h |
| 50 m/s | 180 km/h |
| 100 m/s | 360 km/h |
| 500 m/s | 1800 km/h |
| 1000 m/s | 3600 km/h |
| Kilometre per hour | Metre per second |
|---|---|
| 1 km/h | 0.277778 m/s |
| 2 km/h | 0.555556 m/s |
| 3 km/h | 0.833333 m/s |
| 4 km/h | 1.111111 m/s |
| 5 km/h | 1.388889 m/s |
| 10 km/h | 2.777778 m/s |
| 15 km/h | 4.166667 m/s |
| 20 km/h | 5.555556 m/s |
| 25 km/h | 6.944444 m/s |
| 50 km/h | 13.888889 m/s |
| 100 km/h | 27.777778 m/s |
| 500 km/h | 138.888889 m/s |
| 1000 km/h | 277.777778 m/s |
| Situation | From | To |
|---|---|---|
| Walking pace | 1.4 m/s | 5.04 km/h |
| Jogging | 3 m/s | 10.8 km/h |
| Cycling | 7 m/s | 25.2 km/h |
| Sprinter | 10 m/s | 36 km/h |
| Motorway car | 30 m/s | 108 km/h |
| Speed of sound | 343 m/s | 1,235 km/h |
Multiply by 3.6, or multiply by 4 and take off 10%. 10 m/s is about 36 km/h.
Weather services and physics use metres per second, while road speeds use km/h. A wind of 20 m/s is 72 km/h.
Divide by 3.6 to go back from km/h, not by 3.6 km. A speed of 36 km/h is only 10 m/s.
The factor 3.6 is simply 3,600 seconds in an hour divided by 1,000 metres in a kilometre.