Convert Ounce square inches to Tonne square metres
Convert Ounce square inches (oz·in²) to Tonne square metres (t·m²) instantly and accurately.
Conversion Formula
t·m² = oz·in² × 1.828997834e-8
About Ounce square inches
The ounce square inch (oz·in²) equals ≈1.829 × 10⁻⁵ kg·m², used in US precision instrument engineering for light rotating components. Pre-metric American gyroscope gimbal assemblies and US MIL-SPEC instrument servo actuators cited inertia in oz·in²; NACA gyroscope test reports use oz·in² for small rotating elements. 1 oz·in² ≈1.829 × 10⁻⁵ kg·m² = 16 oz·in² per lb·in².
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
| Ounce square inches (oz·in²) | Tonne square metres (t·m²) |
|---|---|
| 1 oz·in² | 1.829 × 10-8 t·m² |
| 2 oz·in² | 3.658 × 10-8 t·m² |
| 5 oz·in² | 9.145 × 10-8 t·m² |
| 10 oz·in² | 1.829 × 10-7 t·m² |
| 25 oz·in² | 4.572 × 10-7 t·m² |
| 50 oz·in² | 9.145 × 10-7 t·m² |
| 100 oz·in² | 1.829 × 10-6 t·m² |