Every classic formula you reach for — beams, frames, arches, plates, section properties, bearing capacity, pipe flow — as an interactive calculator with live diagrams, a full derivation and a one-click printable report.
Pick a case, type your numbers, read the answer — with the formulas shown so you can check every step.
Not a black box. Each calculator shows its source, its equations and its intermediate values.
Shear, moment and deflection update as you type. Hover any point to read V, M and Δ.
Every reaction, maximum and location shown with its formula — ready to paste into a calc package.
One click produces a clean A4/Letter PDF with inputs, diagrams and results.
Switch between m·kN and ft·lb at any time. Sensible defaults for both systems.
Slide to any x along the member and read the section forces at that exact location.
AWC Design Aid No. 6, Roark's Formulas, Timoshenko, Das, Chow — cited on every tool.
One free calculator per section forever. Upgrade for the full library.
Simple beam, uniformly distributed load — the most used calculation in structural engineering, open to everyone.
Open the free beam calculator