Convert Ounce square inches to Kilogram square metres
Convert Ounce square inches (oz·in²) to Kilogram square metres (kg·m²) instantly and accurately.
Conversion Formula
kg·m² = oz·in² × 1.828997834e-5
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 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
| Ounce square inches (oz·in²) | Kilogram square metres (kg·m²) |
|---|---|
| 1 oz·in² | 1.829 × 10-5 kg·m² |
| 2 oz·in² | 3.658 × 10-5 kg·m² |
| 5 oz·in² | 9.145 × 10-5 kg·m² |
| 10 oz·in² | 0.0001829 kg·m² |
| 25 oz·in² | 0.000457249 kg·m² |
| 50 oz·in² | 0.000914499 kg·m² |
| 100 oz·in² | 0.001829 kg·m² |