Angle Iron Section Modulus Calculator | Structural Strength in mm³/in³

Need to know how strong your angle iron is? Calculate section modulus in seconds.

The Angle Iron Section Modulus Calculator provides fast and accurate values for the bending strength of L-shaped angle profiles. Simply input your angle dimensions to determine the section modulus (Z) — a key indicator of how well the profile resists bending under load.

This tool supports both metric (mm, mm³) and imperial (inch, in³) units, making it ideal for engineers, metal fabricators, and structural designers worldwide. Whether you are working with equal or unequal leg angles, this calculator gives you instant results to inform your decisions.

Need weight per meter or foot before bending? 👉 Use Our Angle Iron Weight Calculator. See how your angle iron is bent into curves and structures: 👉 View Angle Profile Bending Methods

Key Features

• 🧮 Calculates section modulus (Z) for L-shaped angle iron profile
• 📏 Supports equal and unequal leg dimensions
• 🔁 Metric (mm³) and imperial (in³) units
• ⚙️ Suitable for structural design, stress analysis, and profile bending
• ⚡ Instant output with user-friendly interface

✅ How to Use

1. Choose your preferred unit system: mm or inch
2. Enter:
   • Leg A (vertical leg)
   • Leg B (horizontal leg)
   • Thickness (t)
3. Click Calculate to view the section modulus Z
4. Use the value for structural analysis or bending checks

✅ Calculation Principle

For an L-shaped angle, the section modulus is calculated based on the location of the neutral axis, which varies depending on whether it’s equal or unequal leg.

The formula typically uses:

Z = I / y_max

Where:

• I = Moment of inertia of the section
• y_max = Distance from the neutral axis to the farthest point of the section

This calculator applies standard formulas for angle profiles and computes Z based on your inputs.

✅ FAQ

Q1: What is section modulus (Z)?

A: It’s a geometric property that measures the strength of a section under bending stress. Higher Z means better resistance to profile bending.

Q2: Can I use this for aluminum or stainless steel angles?

A: Yes. The shape determines section modulus. Material is only needed for stress calculations, not geometry.

Q3: Does it support both equal and unequal leg angles?

A: Yes, just enter different A and B leg lengths to get the section modulus for unequal angles.

Q4: How accurate is this calculator?

A: The formulas used are based on standard engineering references. It’s suitable for preliminary design, procurement, and comparison.