I-Beam Moment of Inertia Calculator
I-beam moment of inertia measures how the flange and web area is distributed about the bending axis. The calculator also reports section modulus for stress checks.
moment of inertia calculator i beam i beam moment of inertia calculator i beam section modulus
Strong-axis idea
For an ideal sharp-corner I-beam, inertia is the outer rectangle minus the web-height void. Rolled sections with fillets differ slightly from the ideal geometry.
Section modulus
S = I / c
Design workflow
Use I for deflection checks and S for bending stress. For final rolled-shape design, compare against the published section table.
Related pages
- Section modulus calculator - area moment of inertia, section modulus and area.
- Beam deflection calculator - general beam load-case deflection formulas.
- I-beam section modulus - I-beam geometry and strong-axis section properties.
- Square tube deflection calculator - HSS beam stiffness and stress checks.