Convert Gal to Millimetres per second squared
Convert Gal (Gal) to Millimetres per second squared (mm/s²) instantly and accurately.
Conversion Formula
mm/s² = Gal × 10
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.
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.
Quick Reference Table
| Gal (Gal) | Millimetres per second squared (mm/s²) |
|---|---|
| 1 Gal | 10 mm/s² |
| 2 Gal | 20 mm/s² |
| 5 Gal | 50 mm/s² |
| 10 Gal | 100 mm/s² |
| 25 Gal | 250 mm/s² |
| 50 Gal | 500 mm/s² |
| 100 Gal | 1000 mm/s² |