# Common Shapes Rotational Inertia Calculator

getcalc.com's **Moment of Inertia Calculator** is an online physics tool to measure the rotational inertia of different objects of most common shapes based on the mass distribution and their axis, in both US customary & metric (SI) units.

## Definition & Formula

**Moment of Inertia** is a physical quantity that resist to transitional motion. It's the angular esistance to keep the stationary object stationary and moving object moving, mathematically derived from the sum of products obtained by multiplying the mass of each particle of matter in a given objevt by the square of its distance from the axis.