Convert Millimetres per second squared to Inches per second squared
Convert Millimetres per second squared (mm/s²) to Inches per second squared (in/s²) instantly and accurately.
Conversion Formula
in/s² = mm/s² × 0.03937007874
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 Inches per second squared
The inch per second squared (in/s²) equals exactly 0.0254 m/s², used in US customary engineering for machine tool acceleration, CNC linear stages, and vibration testing. Standard gravity is g₀ = 386.089 in/s², a constant embedded in US dynamics software (ANSYS, Nastran) configured with US customary units. High-performance linear motor stages reach 500-2000 in/s². 1 in/s² = 0.0254 m/s² ≈ 2.59 × 10⁻³ g₀.
Quick Reference Table
| Millimetres per second squared (mm/s²) | Inches per second squared (in/s²) |
|---|---|
| 1 mm/s² | 0.0393701 in/s² |
| 2 mm/s² | 0.0787402 in/s² |
| 5 mm/s² | 0.19685 in/s² |
| 10 mm/s² | 0.393701 in/s² |
| 25 mm/s² | 0.984252 in/s² |
| 50 mm/s² | 1.9685 in/s² |
| 100 mm/s² | 3.93701 in/s² |