The elastic section modulus is defined as S = I / y, where I is the second moment of area (or moment of inertia) and y is the distance from the neutral axis to any given fiber.

Equations for the section moduli of common shapes are given below. The section moduli for various profiles are often available as numerical values in tables that list the properties of standard structural …

Feb 8, 2026 · How do you calculate the section modulus? The Section modulus S is calculated by dividing the Moment of Inertia I by the distance z from the Cross-section centre to the edge.

Use this tool to calculate the section modulus, second area moment, and neutral axis of many structural profiles, given their dimensions.

Mar 21, 2026 · Calculate Section Modulus (S & Z) instantly for rectangular and circular beams. Learn the formulas, understand shape factors, and optimize your structural designs.

Mar 19, 2026 · Section modulus is calculated by dividing a cross-section’s moment of inertia by the distance from its center (neutral axis) to its outermost edge. The general formula is S = I / y, where I …

The plastic section modulus is necessary to calculate plastic moment capacity of the section. The plastic section modulus is the sum of moment of area of area under compression about PNA (plastic neutral …

Use this section modulus calculator to compute the elastic section modulus (also searched as Zxx calculator) for common sections. The calculator uses Z = I / c and reports Zxx and Zyy with unit …

Calculate section modulus for common shapes and learn more about this important cross-section property with this helpful guide.

Calculate elastic and plastic section modulus for various cross-sections including rectangles, circles, I-beams, and hollow shapes. Includes moment of inertia calculations.