Convert Pound square inches to Gram square millimetres
Convert Pound square inches (lb·in²) to Gram square millimetres (g·mm²) instantly and accurately.
Conversion Formula
g·mm² = lb·in² × 292639.6534
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.
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.
Quick Reference Table
| Pound square inches (lb·in²) | Gram square millimetres (g·mm²) |
|---|---|
| 1 lb·in² | 292640 g·mm² |
| 2 lb·in² | 585279 g·mm² |
| 5 lb·in² | 1463200 g·mm² |
| 10 lb·in² | 2926400 g·mm² |
| 25 lb·in² | 7315990 g·mm² |
| 50 lb·in² | 14632000 g·mm² |
| 100 lb·in² | 29264000 g·mm² |