4 min read
2026-02-27
60 mph × 1.6 = 96 km/h. Return: km/h ÷ 1.6. Or easier - divide by 5 and multiply by 8.
Wind 10 m/s = 36 km/h. This is a factor worth remembering.
Mach 1 = speed of sound ≈ 1235 km/h (at sea level). At altitude, the speed of sound is slower due to air temperature.
| Points | Speed (m/s) | Speed (km/h) | Description |
|---|---|---|---|
| 0 | 0–0.2 | 0–1 | Calm |
| 3 | 3.4–5.4 | 12–19 | Light wind |
| 6 | 10.8–13.8 | 39–49 | Strong wind |
| 9 | 20.8–24.4 | 75–88 | Storm |
| 12 | >32.7 | >117 | Hurricane |
Runners use min/km. 10 km/h = 6:00 min/km. 12 km/h = 5:00 min/km.
See also: Length Converter, Pressure Converter