Convert Metres per Second to Kilometres per Second
Convert Metres per Second (m/s) to Kilometres per Second (km/s) instantly and accurately.
Conversion Formula
km/s = m/s × 0.001
About Metres per Second
The metre per second (m/s) is the SI unit of speed. Brisk walking ~1.4 m/s; Usain Bolt's peak sprint ~12.4 m/s; speed of sound in air at 20°C 343.2 m/s; in water 1,481 m/s. Rifle muzzle velocities 370-1,200 m/s. Speed of light = exactly 299,792,458 m/s (the defined constant from which the metre is derived since 1983). 1 m/s = 3.6 km/h = 2.23694 mph = 1.94384 kn.
About Kilometres per Second
A kilometre per second (km/s) = 1,000 m/s - the scale of orbital mechanics and hypervelocity. ISS orbital speed ≈ 7.66 km/s; Earth escape velocity 11.186 km/s. Voyager 1 travels ~17 km/s relative to the Sun. Meteoroids enter Earth's atmosphere at 11-72 km/s; solar wind 400-800 km/s. High-explosive detonation fronts propagate at 6.9-8.8 km/s. 1 km/s = 3,600 km/h = 2,236.9 mph.
Quick Reference Table
| Metres per Second (m/s) | Kilometres per Second (km/s) |
|---|---|
| 1 m/s | 0.001 km/s |
| 2 m/s | 0.002 km/s |
| 5 m/s | 0.005 km/s |
| 10 m/s | 0.01 km/s |
| 25 m/s | 0.025 km/s |
| 50 m/s | 0.05 km/s |
| 100 m/s | 0.1 km/s |