Free Online Beam Calculator

Analyse beams instantly with our free structural analysis tool. Get shear force diagrams, bending moment diagrams, and deflection results in seconds-no signup or download required.

Beam analysis with moment and shear diagrams in AutoCalcs

Visualise bending moment, shear force, and deflection diagrams instantly

What Can You Calculate?

Our beam calculator handles all common beam configurations that structural engineers encounter daily. Whether you're checking a simple residential beam or analysing a complex continuous span, AutoCalcs delivers accurate results instantly.

Beam Types

  • Simply supported beams
  • Cantilever beams
  • Continuous beams
  • Propped cantilevers

Load Types

  • Point loads
  • Distributed loads (UDL)
  • Applied moments
  • Multiple load combinations

Results

  • Shear force diagrams
  • Bending moment diagrams
  • Deflection curves
  • Support reactions

Features

  • Real section library
  • Material database
  • Unit conversion
  • Save & share projects

How It Works

AutoCalcs uses Pynite, an open-source finite element engine, to solve your beam problems using the Direct Stiffness Method. This means you get accurate results for any configuration-not just the simple cases covered by textbook formulas.

  1. Draw geometry - Create nodes and connect them with members
  2. Define supports - Fixed, pinned, roller, or custom restraints
  3. Assign properties - Pick sections and materials from the library
  4. Apply loads - Point loads, distributed loads, moments
  5. Run analysis - Linear, P-Delta, or Buckling with instant results
  6. View results - Diagrams for deflection, moment, shear, axial, and torsion

Why Choose AutoCalcs?

Most online beam calculators are limited to simple cases or require you to sign up before showing results. AutoCalcs is different:

  • Instant Access - No installation. Start modelling in your browser immediately.
  • Design Code Checks - Integrated AISC 360, Eurocode 3, AS 4100, and CSA S16 steel design checks (usage limits apply).
  • Beyond 1D formulas - Model beams within full 3D structures.
  • Professional Accuracy - FEA-based solver, not simplified formulas.
  • Open Source Engine - Powered by verified open-source FEA libraries.

Start Calculating Now

No download. No signup. Just open and start modelling.

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