Steel Section Calculator
Cross-sectional area, moment of inertia, section modulus and self-weight for common steel structural sections.
Input Parameters
Choose a section shape and enter its dimensions
Results
Calculated section properties
Cross-Sectional Area
0.0 mm²
Moment of Inertia, Ix
0 mm⁴
Moment of Inertia, Iy
0 mm⁴
Section Modulus, Sx
0 mm³
Self-Weight
0.00 kg/m
Formulas Used
Standard section-property formulas (steel density taken as 7850 kg/m³)
Solid Sections
Rect. A: A = b·h
Rect. Ix: Ix = b·h³/12
Circle A: A = πd²/4
Circle I: I = πd⁴/64
Built-Up Sections
I-Beam A: A = 2·b·t + (h−2t)·tw
I-Beam Ix: Ix = [b·h³ − (b−tw)(h−2t)³]/12
Box Ix: Ix = [B·H³ − b·h³]/12
Derived Properties
Sx: Sx = Ix / (h/2)
Weight: w = A·ρ_steel (ρ = 7850 kg/m³)