Square Tube Moment of Inertia Calculator
The moment of inertia (I) represents the resistance of a square tube against bending deformation.
A higher moment of inertia value indicates:
- Higher bending resistance
- Better structural stiffness
- Improved load-bearing performance
Because square tubes have almost identical moments of inertia around both axes, they provide balanced bending performance in horizontal and vertical directions.
Applicable Standards
- ASTM A500 Square Tube
- EN 10219 SHS
- AS/NZS 1163 Hollow Section
Square Tube Moment of Inertia Calculator
Calculate the moment of inertia (I) of square steel tubes based on outer size and wall thickness.
Calculation Formula
I = (B⁴ − (B−2t)⁴) / 12
Where:
- I = Moment of inertia (mm⁴)
- B = Outer side length of square tube (mm)
- t = Wall thickness (mm)
