How does the Moment Of Inertia Calculator work?

Calculate I by integrating area times distance squared from neutral axis Then: For common shapes: rectangles I = bh³/12, circles I = πd⁴/64 Then: Results show bending stiffness contribution.

Can you give an example of how to use the Moment Of Inertia Calculator?

Example: Input Rectangular beam 200 mm wide × 400 mm tall gives a result of I = 200×400³/12 ≈ 1.07×10⁹ mm⁴ (Significant bending resistance).

Is the Moment Of Inertia Calculator free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Moment Of Inertia Calculator?

Our Moment Of Inertia Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

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Moment Of Inertia Calculator

Moment of Inertia Calculator

Shape

Width (b, in)

Height (h, in)

Moment of inertia measures a shape's resistance to bending. Higher I values indicate better deflection resistance and are key in beam selection.

Symbol	Name	Unit	Description
I	bh³/12	—	bh³/12

Difficulty:intermediate

References

›Moment Of Inertia — Wikipedia

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Moment Of Inertia Calculator

Moment of Inertia Calculator

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Moment of Inertia Calculator