Stress Calculator

Calculate axial stress, bending stress, shear stress, combined stress, required area, required section modulus, and simplified allowable stress utilization. Use this stress calculator for beams, columns, posts, rods, plates, shafts, joists, steel members, wood members, and preliminary structural checks.

Calculate Structural Stress

Axial stress = force ÷ area. Bending stress = moment ÷ section modulus. Shear stress = shear force ÷ shear area.
Your result will appear here.

How the stress calculator works

Axial stress:
The calculator divides axial force by cross-sectional area to estimate tension or compression stress.

Bending stress:
The calculator converts bending moment to inch-pounds and divides by section modulus.

Shear stress:
The calculator divides shear force by shear area to estimate average shear stress.

Combined check:
The calculator combines axial and bending stress, then compares stress ratios against allowable values.

Why use a stress calculator?

A stress calculator helps estimate how much demand is placed on a structural member from axial force, bending moment, and shear force.

It can help compare axial stress, bending stress, shear stress, combined stress, required area, required section modulus, and simplified utilization.

What your result means

Your result shows estimated axial stress, bending stress, shear stress, combined normal stress, required area, required section modulus, stress utilization, and simplified pass/fail status. These are preliminary planning estimates only.

Stress calculator formulas

Frequently asked questions

What is stress in structural calculations?

Stress is force divided by area. It describes how much internal demand a material experiences from loads such as tension, compression, bending, or shear.

What is the difference between axial stress and bending stress?

Axial stress comes from a force applied along the member. Bending stress comes from a bending moment and is calculated using section modulus.

How do you calculate required section modulus?

Convert bending moment to inch-pounds, then divide by allowable bending stress in PSI. The result is required section modulus in cubic inches.

Can this calculator replace structural design?

No. This calculator estimates simplified stress only. Final structural design should also check stability, buckling, deflection, shear, bending, bearing, connections, load combinations, material grade, and local code requirements.