Square Tube Cross-Sectional Area Calculator
The cross-sectional area of a square steel tube refers to the area actually occupied by the steel within its cross-section—that is, the area of the steel remaining after excluding the hollow interior.
It is a crucial parameter in engineering design, frequently used to evaluate the following characteristics of the tube:
Load-bearing capacity
Compressive strength
Material quantity
Theoretical weight
It is important to note that the external dimensions of the square tube do not represent the actual area of the steel itself. For example:
In a 100×100 mm square tube, the interior is hollow; therefore, the steel that actually bears the load is the material forming the outer walls, rather than the entire 100×100 mm area.
Square Tube Cross-Sectional Area Calculator
Calculate the cross-sectional area and theoretical weight of square steel tubes.
Formula
Cross-sectional Area:
A = B² − (B − 2t)²
Where:
- A = Cross-sectional area (mm²)
- B = Outer side length (mm)
- t = Wall thickness (mm)
Note: This calculator applies only to square hollow sections; it is not suitable for CHS or RHS.
