Convert Millimetres per second squared to Kilometres per second squared
Convert Millimetres per second squared (mm/s²) to Kilometres per second squared (km/s²) instantly and accurately.
Conversion Formula
km/s² = mm/s² × 1.000000000e-6
About Millimetres per second squared
The millimetre per second squared (mm/s²) equals 10⁻³ m/s², the standard unit for vibration acceleration in machine condition monitoring. ISO 10816 and ISO 20816 define machinery vibration limits in mm/s and mm/s²; ISO 10816-3 Zone A boundary for industrial machinery is ≈32 mm/s² at 2.2 Hz. Seismically, MMI VI ground shaking (masonry damage threshold) corresponds to 620-1250 mm/s² peak ground acceleration. 1 mm/s² = 10⁻³ m/s² ≈ 1.02 × 10⁻⁴ g₀.
About Kilometres per second squared
The kilometre per second squared (km/s²) equals 1000 m/s², useful in astrodynamics where velocities are naturally in km/s. Solar system surface gravities: Earth ≈ 9.807 × 10⁻³ km/s², Moon ≈ 1.62 × 10⁻³ km/s², Jupiter ≈ 0.0248 km/s², Sun ≈ 0.274 km/s². Spacecraft trajectory simulators (GMAT, STK) express perturbation accelerations in km/s² through the equation of motion ā = -μr/r³ + δa_perturb. Ion engine thrust on a 600 kg probe (8 mN) gives ≈ 1.3 × 10⁻⁸ km/s². 1 km/s² = 1000 m/s² ≈ 101.97 g₀.
Quick Reference Table
| Millimetres per second squared (mm/s²) | Kilometres per second squared (km/s²) |
|---|---|
| 1 mm/s² | 1 × 10-6 km/s² |
| 2 mm/s² | 2 × 10-6 km/s² |
| 5 mm/s² | 5 × 10-6 km/s² |
| 10 mm/s² | 1 × 10-5 km/s² |
| 25 mm/s² | 2.5 × 10-5 km/s² |
| 50 mm/s² | 5 × 10-5 km/s² |
| 100 mm/s² | 1 × 10-4 km/s² |