Convert gram square millimetre to kilogram square metre
Gram Square Millimetre
The gram square millimetre (g·mm²) is a small unit of moment of inertia used in precision engineering, micro-mechanics, and instrument design. It represents the rotational inertia of a one-gram mass located one millimetre from the axis of rotation. One gram square millimetre equals 10⁻⁹ kg·m², the SI unit of moment of inertia.
Kilogram Square Metre
The kilogram square metre (kg·m²) is the SI unit of moment of inertia (also called rotational inertia), representing the resistance of a body to changes in its rotational motion. It is defined as the sum of the products of each mass element and the square of its distance from the rotation axis. The kg·m² appears in rotational analogs of Newton's second law, where torque equals moment of inertia times angular acceleration.