kilogram square meter
Moment of inertiaexact by definition
The kilogram square metre is the SI unit of mass moment of inertia, the rotational analogue of mass. Its factor is 1 by construction and the unit is exact. It measures how strongly a body resists angular acceleration about a given axis, and it depends on the axis chosen as well as on the body.
Watch out: Mass moment of inertia (kg·m²) is a different quantity from the second moment of area (m⁴) used in beam bending, despite both being called "moment of inertia" and both often written . One involves mass and governs rotational dynamics, the other involves only geometry and governs stiffness. Their units differ, which is the quickest way to tell which one a formula wants.
| 1 | 1 |
One kilogram square meter in every moment of inertia unit
| 10,000,000 | gram square centimeter (g·cm²) | |
| 1,000,000 | kilogram square millimeter (kg·mm²) | |
| 54,674.8 | ounce square inch (oz·in²) | |
| 10,000 | kilogram square centimeter (kg·cm²) | |
| 3,417.17 | pound square inch (lb·in²) | |
| 1,000 | gram square meter (g·m²) | |
| 23.7304 | pound square foot (lb·ft²) | |
| 8.85075 | pound-force inch second squared (lbf·in·s²) | |
| 1 | kilogram square meter (kg·m²)this unit | |
| 0.737562 | slug square foot (slug·ft²) | |
| 0.737562 | pound-force foot second squared (lbf·ft·s²) | |
| 0.001 | tonne square meter (t·m²) |
Solvers that use moment of inertia