Section properties & builder

Area, centroid, second moments, principal axes, elastic and plastic moduli, torsion and warping constants and the shear centre — for standard shapes or a section you build from plates and circles.

FREE · NO SIGN-UP v1.0.0 · verified against 9 reference cases

INPUTUNITS: mm → cm-based results

1 · Shape

2 · Dimensions mm

h · depth b · width t_w · web t_f · flange r · root radius t · wall D · diameter

Results update as you type. y is horizontal, z is vertical; I_y is about the horizontal axis.

SECTIONI-section

AREA A53.81 cm²

I_Y · HORIZONTAL AXIS8356.3 cm⁴

I_Z · VERTICAL AXIS603.8 cm⁴

W_PL,Y628.4 cm³

Free with an account · Sign in

HOW IT'S CALCULATED · WITH YOUR NUMBERS

Step by step, with your numbers

01
Equilibrium████ ██ ███████ · ██████ = ██.██
02
Reactions████ ██ ███████ · ██████ = ██.██
03
Shear force████ ██ ███████ · ██████ = ██.██
04
Bending moment████ ██ ███████ · ██████ = ██.██
05
Deflection████ ██ ███████ · ██████ = ██.██
06
Stress████ ██ ███████ · ██████ = ██.██

FREE ACCOUNT Sign in to see the step-by-step working. A free account takes a minute — no card needed.

Create a free account Sign in

References: closed-form section formulas; thin-walled theory (Timoshenko & Gere; Roark) for J, I_w and the shear centre; rolled sections checked against the European section tables.

BEYOND A CROSS-SECTION

Composite, tapered or thin-walled members with local buckling — we model the full member.

Submit a Problem →

More calculators

AVAILABLE · YOU ARE HERESection properties & builder AVAILABLEBeam calculator AVAILABLECentre of gravity & support reactions AVAILABLEColumn buckling