Convert Slug square inches to Gram square millimetres
Convert Slug square inches (slug·in²) to Gram square millimetres (g·mm²) instantly and accurately.
Conversion Formula
g·mm² = slug·in² × 9415402.419
About Slug square inches
The slug square inch (slug·in²) equals ≈9.415 × 10⁻³ kg·m², used in US aerospace guidance and flight mechanics. Pre-metric inertial navigation unit (INU) test reports and NACA stability-derivative tables listed gyroscope platform inertia in slug·in²; US autopilot servo actuator sizing also uses slug·in². 1 slug·in² ≈9.415 × 10⁻³ kg·m² ≈32.17 lb·in².
About Gram square millimetres
The gram square millimetre (g·mm²) equals 10⁻⁹ kg·m², the natural unit for MEMS gyroscope resonators and micro-fabricated spinning structures. CubeSat reaction wheel rotors range 1-50 g·mm²; chip-scale IMU proof masses sit below 1 g·mm². Watchmaking balance wheels and miniature turbine blades also fall in this range. 1 g·mm² = 10⁻⁹ kg·m² = 0.01 g·cm².
Quick Reference Table
| Slug square inches (slug·in²) | Gram square millimetres (g·mm²) |
|---|---|
| 1 slug·in² | 9415400 g·mm² |
| 2 slug·in² | 18830800 g·mm² |
| 5 slug·in² | 47077000 g·mm² |
| 10 slug·in² | 94154000 g·mm² |
| 25 slug·in² | 235385000 g·mm² |
| 50 slug·in² | 470770000 g·mm² |
| 100 slug·in² | 941540000 g·mm² |