Free calculatorsSection Properties Calculator
Pure-geometry cross-section properties — parametric rectangle, I-section, RHS, CHS and T, or pick a UB / UC / IPE from the section library. Live section drawing and bending-stress diagram, then area, centroid, second moments, radii of gyration, elastic and plastic section moduli, torsion constant J and warping constant Cw, with a printable step-by-step sheet.
Uses the validated STATIX section engine (
sectionTorsion + section library) — the same code verified across 221 benchmarks. No design code — geometry only.Inputs
Section
Section type
Dimensions
mm
mm
Shear & classification
kN
MPa
Applied moment — stress check
kNm
Material (for mass only)
kg/m³
Cross-section
Bending stress distribution — major (Z-Z) axis elastic vs plastic block
Section properties
Z-Z
—
enter dimensions
| Area A | — |
| Centroid (from ref) | — |
| Iz — strong (major) | — |
| Iy — weak (minor) | — |
| rz / ry | — |
| Wel,z / Wel,y | — |
| Wpl,z / Wpl,y | — |
| Torsion constant J | — |
| Warping constant Cw | — |
| Perimeter / mass | — |
Shape factor Wpl/Wel
Property checks geometry consistency (informational)
Applied moment — bending stress
| Applied moment Mf | — |
| σtop = Mf·ctop/Iz | — |
| σbot = Mf·cbot/Iz | — |
| Yield check vs fy | — |
Shear & classification
| Shear centre (offset from centroid) | — |
| Av,z / Av,y — shear area | — |
| Applied shear V | — |
| τmax,z = V·Q/(I·t) | — |
| τavg = V/Av,z | — |
| Class — EN 1993-1-1 T5.2 | — |
Section class
—
Step-by-step calculation
Section comparison — all sections
Every section in the project, side by side. Use “Add section” above to compare several profiles, then Download PDF (print → Save as PDF). x = strong (major) axis, y = weak (minor) axis; Zx/Zy are the elastic section moduli.
221
This isn't a toy calculator
It runs the same engine as STATIX — a full structural suite validated against 221 closed-form and code benchmarks across analysis, design and connections — the full 3D modeller with native CBFEM is coming soon. Model the whole building, not just one section.