Welcome to our calculator for the moment of inertia for a rectangular hollow section. Enter the height (**H**), width (**B**) and thickness (**t**) of your section below, and see the results in the output section below.

This tool calculates **Ixx** and **Iyy** about the centroidal axis.

The moment of inertia of a rectangular hollow section can be calculated using the equations shown to the right. **B** represents the section's width, and **H** is its height. **t** is the thickness of the steel in the section. b and h denote the inner dimensions of the section, and are used to calculate the dimensions of the hollow space.

Outputs for **Ixx** and **Iyy** are presented below!

Enter your inputs, and see outputs for **Ixx** and **Iyy** and section dimensions below!

H

:100mm

B

:135mm

t

:5mm

Ixx (mm4)

:3656250

Iyy (mm4)

:5854687.5

Area

:2250mm2

xc

:67.5mm

yc

:50mm

💬 We'd love your feedback on this template! It takes 1min