Convert Pound square feet to Gram square metres
Convert Pound square feet (lb·ft²) to Gram square metres (g·m²) instantly and accurately.
Conversion Formula
g·m² = lb·ft² × 42.14011009
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.
About Gram square metres
The gram square metre (g·m²) equals 10⁻³ kg·m², used for very light rotors with large radii. Lightweight UAV propeller blades, model aircraft propellers, and thin foam circular discs are characterised in g·m²; it bridges g·cm² and kg·m² in laboratory-scale spinning experiments. 1 g·m² = 10⁻³ kg·m² = 10 kg·cm² = 10 000 g·cm².
Quick Reference Table
| Pound square feet (lb·ft²) | Gram square metres (g·m²) |
|---|---|
| 1 lb·ft² | 42.1401 g·m² |
| 2 lb·ft² | 84.2802 g·m² |
| 5 lb·ft² | 210.701 g·m² |
| 10 lb·ft² | 421.401 g·m² |
| 25 lb·ft² | 1053.5 g·m² |
| 50 lb·ft² | 2107.01 g·m² |
| 100 lb·ft² | 4214.01 g·m² |