Convert Slug square feet to Kilogram square metres
Convert Slug square feet (slug·ft²) to Kilogram square metres (kg·m²) instantly and accurately.
Conversion Formula
kg·m² = slug·ft² × 1.355817948
About Slug square feet
The slug square foot (slug·ft²) equals ≈1.3558 kg·m², the fundamental moment of inertia unit in US customary aerodynamics and spacecraft attitude dynamics. Pre-SI spacecraft inertia tensors are tabulated in slug·ft² - NASA Apollo CSM principal moments ranged 12 000-90 000 slug·ft². USAF flight manuals and NACA stability reports use slug·ft². 1 slug·ft² ≈1.3558 kg·m² = 32.174 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
| Slug square feet (slug·ft²) | Kilogram square metres (kg·m²) |
|---|---|
| 1 slug·ft² | 1.35582 kg·m² |
| 2 slug·ft² | 2.71164 kg·m² |
| 5 slug·ft² | 6.77909 kg·m² |
| 10 slug·ft² | 13.5582 kg·m² |
| 25 slug·ft² | 33.8954 kg·m² |
| 50 slug·ft² | 67.7909 kg·m² |
| 100 slug·ft² | 135.582 kg·m² |