Convert Millimetres per Second to Kilometres per Second
Convert Millimetres per Second (mm/s) to Kilometres per Second (km/s) instantly and accurately.
Conversion Formula
km/s = mm/s × 1.000000000e-6
About Millimetres per Second
A millimetre per second (mm/s) is 10⁻³ m/s - the speed of slow industrial mechanisms and recognisable biological motion. FDM 3D printers move at 40-120 mm/s for perimeters and 150-300 mm/s for infill. Garden snails travel 0.5-1.5 mm/s; earthworms 3-5 mm/s. CNC finishing operations run 1-several hundred mm/s. Hydraulic precision slides work at mm/s for surface preparation. Ultrasound particle velocities in soft tissue are also in this range. 1 mm/s = 10⁻³ m/s.
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
| Millimetres per Second (mm/s) | Kilometres per Second (km/s) |
|---|---|
| 1 mm/s | 1 × 10-6 km/s |
| 2 mm/s | 2 × 10-6 km/s |
| 5 mm/s | 5 × 10-6 km/s |
| 10 mm/s | 1 × 10-5 km/s |
| 25 mm/s | 2.5 × 10-5 km/s |
| 50 mm/s | 5 × 10-5 km/s |
| 100 mm/s | 1 × 10-4 km/s |