Convert Millimetres per second squared to Gal
Convert Millimetres per second squared (mm/s²) to Gal (Gal) instantly and accurately.
Conversion Formula
Gal = mm/s² × 0.1
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 Gal
The gal (Gal) equals 1 cm/s² = 0.01 m/s², named after Galileo Galilei in recognition of his free-fall experiments. Earth's surface gravity is approximately 980 Gal; the GRS80 normal gravity formula gives 978.03 Gal at the equator and 983.22 Gal at the poles. The BIPM SI Brochure recognises the Gal as a non-SI unit accepted in geophysics. 1 Gal = 0.01 m/s² = 1 cm/s² = 1000 mGal ≈ 1.02 × 10⁻³ g₀.
Quick Reference Table
| Millimetres per second squared (mm/s²) | Gal (Gal) |
|---|---|
| 1 mm/s² | 0.1 Gal |
| 2 mm/s² | 0.2 Gal |
| 5 mm/s² | 0.5 Gal |
| 10 mm/s² | 1 Gal |
| 25 mm/s² | 2.5 Gal |
| 50 mm/s² | 5 Gal |
| 100 mm/s² | 10 Gal |