Beam Calculator — shear force, bending moment and deflection

A free beam calculator for continuous and simply supported beams. Enter spans, supports and loads and read the reactions, shear force and bending moment diagrams and the deflected shape as you type — solved in your browser by a Rust engine, with nothing to install and no sign-up.

• Any number of spans, with pinned, roller, fixed and spring supports, internal hinges and support settlement.
• Point loads, UDLs, trapezoidal loads and applied moments, in SI or Imperial units.
• Section properties from 2,600+ published steel sections across six standards — AS4100, AISC, EN 10365, BS 4, JIS and IS 808.
• Export a full calculation report, or call the same solver over HTTP through the public API.

Background reading: How to use the beam calculator · Beam analysis explained · Shear force and bending moment diagrams