Moment of Inertia Calculator
Calculate the moment of inertia (second moment of area) for common cross-sectional shapes used in structural engineering.
Section Shape
in
in
Moment of Inertia (Ix)
864.0000 in&sup4;
Ix (Strong Axis)
864.0000 in&sup4;
Iy (Weak Axis)
216.0000 in&sup4;
Sx (Section Modulus)
144.0000 in³
Sy (Section Modulus)
72.0000 in³
rx (Radius of Gyration)
3.4641 in
ry (Radius of Gyration)
1.7321 in
Area
72.0000 in²
Polar Moment (J)
1080.0000 in&sup4;
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.