Convert Slug square feet to Gram square millimetres
Convert Slug square feet (slug·ft²) to Gram square millimetres (g·mm²) instantly and accurately.
Conversion Formula
g·mm² = slug·ft² × 1355817948
About Slug square feet
The slug square foot (slug·ft²) equals ≈1.3558 kg·m², the fundamental moment of inertia unit in US customary aerodynamics and spacecraft attitude dynamics. Pre-SI spacecraft inertia tensors are tabulated in slug·ft² - NASA Apollo CSM principal moments ranged 12 000-90 000 slug·ft². USAF flight manuals and NACA stability reports use slug·ft². 1 slug·ft² ≈1.3558 kg·m² = 32.174 lb·ft².
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 feet (slug·ft²) | Gram square millimetres (g·mm²) |
|---|---|
| 1 slug·ft² | 1.356 × 109 g·mm² |
| 2 slug·ft² | 2.712 × 109 g·mm² |
| 5 slug·ft² | 6.779 × 109 g·mm² |
| 10 slug·ft² | 1.356 × 1010 g·mm² |
| 25 slug·ft² | 3.39 × 1010 g·mm² |
| 50 slug·ft² | 6.779 × 1010 g·mm² |
| 100 slug·ft² | 1.356 × 1011 g·mm² |