Convert Slug square inches to Pound square inches
Convert Slug square inches (slug·in²) to Pound square inches (lb·in²) instantly and accurately.
Conversion Formula
lb·in² = slug·in² × 32.17404856
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 Pound square inches
The pound square inch (lb·in²) equals ≈2.926 × 10⁻⁴ kg·m², the standard US customary unit for motor and machinery rotors. Rockwell Automation, Parker Hannifin, and Allied Motion servo sizing catalogs express rotor inertia in lb·in²; US machine-tool spindle and conveyor drive specifications use lb·in². High-speed spindle rotors: 5-50 lb·in². 1 lb·in² ≈2.926 × 10⁻⁴ kg·m² = 1/144 lb·ft².
Quick Reference Table
| Slug square inches (slug·in²) | Pound square inches (lb·in²) |
|---|---|
| 1 slug·in² | 32.174 lb·in² |
| 2 slug·in² | 64.3481 lb·in² |
| 5 slug·in² | 160.87 lb·in² |
| 10 slug·in² | 321.74 lb·in² |
| 25 slug·in² | 804.351 lb·in² |
| 50 slug·in² | 1608.7 lb·in² |
| 100 slug·in² | 3217.4 lb·in² |