Convert Pound square inches to Tonne square metres
Convert Pound square inches (lb·in²) to Tonne square metres (t·m²) instantly and accurately.
Conversion Formula
t·m² = lb·in² × 2.926396534e-7
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 Tonne square metres
The tonne square metre (t·m²) equals 1000 kg·m², used for large industrial rotors and heavy rotating machinery. A 60-tonne paper-machine calendar roll of 0.5 m radius has I ≈7.5 t·m²; synchronous hydro-generator rotors: 50-2000 t·m²; large marine propulsion shafts: 5-50 t·m². 1 t·m² = 1000 kg·m² ≈737.6 slug·ft² ≈23 730 lb·ft².
Quick Reference Table
| Pound square inches (lb·in²) | Tonne square metres (t·m²) |
|---|---|
| 1 lb·in² | 2.926 × 10-7 t·m² |
| 2 lb·in² | 5.853 × 10-7 t·m² |
| 5 lb·in² | 1.463 × 10-6 t·m² |
| 10 lb·in² | 2.926 × 10-6 t·m² |
| 25 lb·in² | 7.316 × 10-6 t·m² |
| 50 lb·in² | 1.463 × 10-5 t·m² |
| 100 lb·in² | 2.926 × 10-5 t·m² |