Convert Gram square millimetres to Pound square feet
Convert Gram square millimetres (g·mm²) to Pound square feet (lb·ft²) instantly and accurately.
Conversion Formula
lb·ft² = g·mm² × 2.373036040e-8
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.
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
| Gram square millimetres (g·mm²) | Pound square feet (lb·ft²) |
|---|---|
| 1 g·mm² | 2.373 × 10-8 lb·ft² |
| 2 g·mm² | 4.746 × 10-8 lb·ft² |
| 5 g·mm² | 1.187 × 10-7 lb·ft² |
| 10 g·mm² | 2.373 × 10-7 lb·ft² |
| 25 g·mm² | 5.933 × 10-7 lb·ft² |
| 50 g·mm² | 1.187 × 10-6 lb·ft² |
| 100 g·mm² | 2.373 × 10-6 lb·ft² |