Steel Square Tube Weight Calculator
Enter side length, wall thickness, and tube length to instantly get the weight of a square hollow steel section in kg/m, kg, and lbs.
Tube Dimensions
Formula Reference
W = (S² − (S − 2t)²) × L × ρ
Where S = outer side length (m), t = wall thickness (m), L = length (m), ρ = density (kg/m³). Inner side = S − 2t.
Enter tube dimensions on the left and click Calculate.
Weight Result
—
kg/m
—
Total kg
—
Total lbs
Common SHS Carbon Steel Sizes (EN 10210 / EN 10219)
| Size (mm) | Wall (mm) | kg/m |
|---|---|---|
| 20 × 20 | 2.0 | 1.12 |
| 25 × 25 | 2.0 | 1.43 |
| 30 × 30 | 2.5 | 2.09 |
| 40 × 40 | 3.0 | 3.45 |
| 50 × 50 | 3.0 | 4.39 |
| 60 × 60 | 4.0 | 6.97 |
| 80 × 80 | 4.0 | 9.41 |
| 100 × 100 | 5.0 | 14.70 |
| 120 × 120 | 6.3 | 22.00 |
| 150 × 150 | 6.3 | 28.10 |
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Summary
Enter side length, wall thickness, and tube length to instantly get the weight of a square hollow steel section in kg/m, kg, and lbs.
How it works
- Enter the outer side length of the square tube.
- Enter the wall thickness of the tube.
- Enter the tube length.
- Select a material to apply its density, or enter a custom density.
- Optionally enter a quantity for batch weight calculations.
- The calculator applies Weight = (S² − (S − 2t)²) × L × ρ and displays kg/m, total kg, and total lbs.
Use cases
- Calculating SHS steel weight for structural and fabrication projects.
- Estimating freight and shipping weight for square tube orders.
- Preparing a bill of materials (BOM) for steel construction.
- Comparing tube weights across different wall thicknesses or materials.
- Checking load limits on steel supports and frames.
- Verifying mill certificate weights against theoretical values.
Frequently Asked Questions
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Last updated: 2026-05-23 ·
Reviewed by Nham Vu