Convert Slug square inches to Pound square feet
Convert Slug square inches (slug·in²) to Pound square feet (lb·ft²) instantly and accurately.
Conversion Formula
lb·ft² = slug·in² × 0.2234308928
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 feet
The pound square foot (lb·ft²) equals ≈0.04214 kg·m², the dominant imperial unit for machine and vehicle rotational inertias. Aircraft control-surface counterbalancing, propeller blade inertia, and turbocharger rotor dynamics are specified in lb·ft²; steam turbine discs and helicopter tail-rotor assemblies: 1-10 000 lb·ft². 1 lb·ft² ≈0.04214 kg·m² = 144 lb·in² ≈0.03108 slug·ft².
Quick Reference Table
| Slug square inches (slug·in²) | Pound square feet (lb·ft²) |
|---|---|
| 1 slug·in² | 0.223431 lb·ft² |
| 2 slug·in² | 0.446862 lb·ft² |
| 5 slug·in² | 1.11715 lb·ft² |
| 10 slug·in² | 2.23431 lb·ft² |
| 25 slug·in² | 5.58577 lb·ft² |
| 50 slug·in² | 11.1715 lb·ft² |
| 100 slug·in² | 22.3431 lb·ft² |