Metres per second (m/s) is the scientific unit for speed — used in physics and technical work — while everyday speed is shown in km/h or mph. Converting is straightforward.
The formulas
- m/s → km/h: multiply by 3.6
- m/s → mph: multiply by 2.23694
- km/h → m/s: divide by 3.6
- mph → m/s: divide by 2.23694
So 1 m/s = 3.6 km/h = 2.237 mph.
The most useful one to remember: multiply m/s by 3.6 to get km/h.
Quick conversion table
| m/s | km/h | mph |
|---|---|---|
| 1 | 3.6 | 2.2 |
| 2 | 7.2 | 4.5 |
| 5 | 18.0 | 11.2 |
| 10 | 36.0 | 22.4 |
| 15 | 54.0 | 33.6 |
| 20 | 72.0 | 44.7 |
| 25 | 90.0 | 55.9 |
| 30 | 108.0 | 67.1 |
Where m/s is used
You'll see m/s in physics problems, wind-speed reports, athletics (a sprinter's velocity), and engineering. For road speed, km/h and mph are the norm.
See your speed in m/s live
You don't have to convert in your head — the GPS Speedometer can show your live speed directly in m/s (tap the m/s unit), as well as km/h, mph and knots. It's free, works in your browser, and your location never leaves your device.