Moment of Inertia Calculator

Calculate moment of inertia for common geometric shapes

Select Shape

Dimensions & Mass

Formula

I = ?

Select a shape to see the formula

Moment of Inertia

kg·m²

Shape Type

Axis of Rotation

Physical Meaning

Moment of inertia represents how difficult it is to change an object's rotational motion.

Calculation

Enter values to see calculation steps

Analogous to mass in linear motion

I = I_cm + md²

L = Iω (rotational equivalent of p = mv)