Convert Pound square inches to Kilogram square metres
Convert Pound square inches (lb·in²) to Kilogram square metres (kg·m²) instantly and accurately.
Conversion Formula
kg·m² = lb·in² × 0.0002926396534
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 Kilogram square metres
The kilogram square metre (kg·m²) is the SI coherent derived unit of moment of inertia. It defines the rotational analogue of mass in Newton's second law: τ = Iα (torque in N·m, angular acceleration in rad/s²). A solid disc of 10 kg and 0.5 m radius has I = 1.25 kg·m². Electric motor rotors: 0.001-10 kg·m². Wind turbine rotors: 10⁶-10⁸ kg·m². 1 kg·m² = 10 000 kg·cm² ≈0.7376 slug·ft².
Quick Reference Table
| Pound square inches (lb·in²) | Kilogram square metres (kg·m²) |
|---|---|
| 1 lb·in² | 0.00029264 kg·m² |
| 2 lb·in² | 0.000585279 kg·m² |
| 5 lb·in² | 0.0014632 kg·m² |
| 10 lb·in² | 0.0029264 kg·m² |
| 25 lb·in² | 0.00731599 kg·m² |
| 50 lb·in² | 0.014632 kg·m² |
| 100 lb·in² | 0.029264 kg·m² |