Convert Tonne square metres to Pound square inches
Convert Tonne square metres (t·m²) to Pound square inches (lb·in²) instantly and accurately.
Conversion Formula
lb·in² = t·m² × 3417171.898
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.
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.
Quick Reference Table
| Tonne square metres (t·m²) | Pound square inches (lb·in²) |
|---|---|
| 1 t·m² | 3417170 lb·in² |
| 2 t·m² | 6834340 lb·in² |
| 5 t·m² | 17085900 lb·in² |
| 10 t·m² | 34171700 lb·in² |
| 25 t·m² | 85429300 lb·in² |
| 50 t·m² | 170859000 lb·in² |
| 100 t·m² | 341717000 lb·in² |