Welcome to our moment of inertia calculator! This page is specifically for finding the moment of inertia for a trapezoidal section. Enter the height (**H**), bottom base width (**B**), upper base width (**a**) and distance between the ends of the lower and upper base from the left (**B2**) of your section below, and see the results in the output section below.

This tool calculates **Ixx** and **Iyy** about the centroidal axis, as well as **Iyy0**, the moment of inertia of the sections taken about the base horizontal axis.

The moment of inertia of a trapezoidal section can be calculated using the equations shown to the right. **H** is the height of the section, **a** and **B** are the base widths of the section, and **B2** and **B3 **are the horizontal distances between the bases.

Enter your inputs, and see outputs for **Ixx,** **Iyy, Iyy0** and section dimensions below!

H

:200mm

B

:225mm

a

:169mm

B2

:45mm

B3

:11mm

Iyy0 (mm4)

:703961567

Ixx (mm4)

:130448957

Iyy (mm4)

:130939510

Area

:39400mm2

xc

:120.597293mm

yc

:95.2622673mm