Free Structural Engineering Calculators

Real FEM solver, unlimited loads, NBR 8800 × AISC 360 side by side, 974+ flexural profiles, free PNG/SVG/CSV export — no login, no watermark.

Real FEM solver for a fixed–free beam: tip deflection δ = PL³/3EI, fixing moment, tip rotation, NBR 8800 × AISC 360, 974+ real profiles, free PNG/SVG/CSV/PDF — no login, no watermark.

Real 2D frame FEM: full single-bay portal (columns + rafters), gravity + wind, N/V/M diagrams on the frame, base reactions, drift, and NBR 8800 × AISC 360 checks — no login, no 3-member cap.

SFD & BMD for the 8 classic beam cases or any custom loading (multiple loads, partial UDLs, applied moments) — with step-by-step equilibrium equations, CSV export, shareable links and steel profiles suggested from Mmax.

Ix, Iy, section modulus, radius of gyration and centroid for 9 cross-sections plus a free custom section builder (welded plates or any polygon) — drawn to scale, and matched live against CalcSteel’s 1,309-profile database.

Unit mass and total weight of reinforcing bars across three standards — CA-50, ASTM #3–#18 and EN Ø6–Ø40 — plus a norm-anchored design check (As,min/As,max, development ℓb & lap ℓs per NBR 6118 / ACI 318 / EC2), an area-match substitution engine, and a saveable bar schedule you export to CSV or a branded PDF. No login.

Weight of any steel plate in seconds — rectangular sheet, circular disc or ring, a commercial-thickness catalog, and a multi-plate take-off with free CSV export.

Weight of any steel piece in seconds — real catalog kg/m for hundreds of profiles, plate/pipe/bar formulas, and a multi-item cut list with free CSV export.

Euler critical load, AISC 360 and NBR 8800 design capacity side by side — with the buckled shape, the effective length K·L and the buckling curve drawn for your column.

Generate ULS & SLS load combinations for three codes side by side — NBR 8681, ASCE 7 and EN 1990 — with γ and ψ factors broken out per parcel and free CSV export. ULS from the CalcSteel production engine. No login.

Type span × length × eave × pitch — get a generated gable portal frame with NBR 6123 wind, sized rafter & column from 454+ profiles, and total steel weight in kg and kg/m². Free, pre-solved, no login.

Tightening torque and clamp-load preload from T = K·F·d — real ISO 8.8/10.9/12.9, ASTM A325/A490 and SAE proof strengths, a nut-factor table, dual kN/lbf output, the NBR 8800 · AISC minimum pretension, live bolt shear/tension from the connection engine, free CSV/PDF export, a shareable link and one-click hand-off to the 3D editor. No login.

Enter σx, σy, τxy → principal stresses, τmax, von Mises and an NBR 8800 / AISC 360 yield check, on a Mohr circle you can drag. Load a real solved FEM section, go 3-D triaxial, share a permalink. Free export, no login.

Convert sheet-metal gauge to thickness (mm/in) and weight (kg/m² · lb/ft²) for steel, galvanized, stainless and aluminum — each on its real gauge standard, side by side.

Convert force, stress, moment, line load and second moment of area between SI and US units — kN·kip, MPa·ksi, kN·m·kip·ft, cm⁴·in⁴ — then route the value straight into the right calculator. Free, no login.