Convert Ounce square inches to Pound square feet
Convert Ounce square inches (oz·in²) to Pound square feet (lb·ft²) instantly and accurately.
Conversion Formula
lb·ft² = oz·in² × 0.0004340277778
About Ounce square inches
The ounce square inch (oz·in²) equals ≈1.829 × 10⁻⁵ kg·m², used in US precision instrument engineering for light rotating components. Pre-metric American gyroscope gimbal assemblies and US MIL-SPEC instrument servo actuators cited inertia in oz·in²; NACA gyroscope test reports use oz·in² for small rotating elements. 1 oz·in² ≈1.829 × 10⁻⁵ kg·m² = 16 oz·in² per 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
| Ounce square inches (oz·in²) | Pound square feet (lb·ft²) |
|---|---|
| 1 oz·in² | 0.000434028 lb·ft² |
| 2 oz·in² | 0.000868056 lb·ft² |
| 5 oz·in² | 0.00217014 lb·ft² |
| 10 oz·in² | 0.00434028 lb·ft² |
| 25 oz·in² | 0.0108507 lb·ft² |
| 50 oz·in² | 0.0217014 lb·ft² |
| 100 oz·in² | 0.0434028 lb·ft² |