Online beam calculator

Every beam case, one directory

The tool above starts blank. If your problem matches a standard configuration, the calculators below load it pre-configured: just swap in your span, loads and section. All of them are the same free tool running in your browser, with the same reactions, shear force and bending moment diagrams, slope, deflection curves and stress checks.

Calculators by beam type

• Steel beam calculator
• Wood beam calculator
• Ridge beam calculator
• Cantilever beam calculator
• Simply supported beam calculator
• Simple beam calculator
• Fixed–fixed beam, UDL
• Overhanging beam
• Continuous beam, two spans
• Gerber beam with internal hinge

Worked examples

Standard textbook cases, ready to run and compare against the closed-form answers on the beam formulas page.

• Simply supported, center point load
• Simply supported, uniform load
• Cantilever, tip point load
• Cantilever, uniform load
• Fixed–fixed, uniform load
• Overhanging beam, uniform load
• Continuous, two equal spans UDL
• Gerber beam with internal hinge

Which calculator do I need?

For floor and roof framing in timber, start with the wood beam calculator. For structural steel with AISC W-shapes, use the steel beam calculator. For rafters bearing on a structural ridge, the ridge beam calculator models rafter reactions as point loads. For beams running over three or more supports, start from the continuous two-span example. Background reading: the SFD & BMD guide explains how to read the output, and the about page covers the tool's assumptions and limitations.