Weight per metre3.30kg/m
6 m bar19.8kg
12 m bar39.6kg
Metres per tonne302.7m
Painting surface0.150m²/m
- Side
- 40 mm
- Wall thickness
- 3 mm
- Cold-formed, EN 10219
- 3.30 kg/m
- Hot-finished, EN 10210
- 3.41 kg/m
- Section area
- 4.21 cm²
- Outer surface
- 0.150 m²/m
- Outer surface
- 0.150 m²/m
Weight by length
| Length | Steel | Stainless 304 | Aluminium |
|---|---|---|---|
| 1 m | 3.30 kg | 3.34 kg | 1.14 kg |
| 2 m | 6.61 kg | 6.67 kg | 2.27 kg |
| 3 m | 9.91 kg | 10.01 kg | 3.41 kg |
| 4 m | 13.21 kg | 13.35 kg | 4.54 kg |
| 5 m | 16.52 kg | 16.69 kg | 5.68 kg |
| 6 m | 19.82 kg | 20.02 kg | 6.82 kg |
| 8 m | 26.43 kg | 26.70 kg | 9.09 kg |
| 10 m | 33.03 kg | 33.37 kg | 11.36 kg |
| 12 m | 39.64 kg | 40.05 kg | 13.63 kg |
How it was calculated
The weight is the section area multiplied by the material density:
kg/m = section area (mm²) × 0.00785. The area comes from side and thickness, minus the rounded corners: for cold-formed tube (EN 10219) the outer radius is 2t up to 6 mm wall, 2.5t up to 10 mm and 3t above; for hot-finished tube (EN 10210) the outer radius is 1.5t.For Square tube 40×40×3, the section area is 4.21 cm², so 1 metre = 4.21 × 0.785 = 3.303 kg.
The real weight can differ by a few percent because of rolling tolerances. For other materials or lengths use the calculator.
Other square tube sizes
Square tube 40×40×1Square tube 40×40×1.2Square tube 40×40×1.5Square tube 40×40×2Square tube 40×40×2.5Square tube 40×40×3Square tube 40×40×4Square tube 40×40×5Square tube 25×25×3Square tube 30×30×3Square tube 35×35×3Square tube 45×45×3Square tube 50×50×3Square tube 60×60×3Square tube 70×70×3Square tube 80×80×3Square tube 90×90×3Square tube 100×100×3Square tube 120×120×3Square tube 140×140×3Square tube 150×150×3Square tube 160×160×3Square tube 180×180×3Full table →
Working out a whole order?
Add Square tube 40×40×3 to the materials list and see the total weight and cost of the order, together with the other products.
Frequently asked questions
How much does one metre of Square tube 40×40×3 weigh?
One metre of steel Square tube 40×40×3 weighs 3.30 kg.
How much does a 6 m bar of Square tube 40×40×3 weigh?
A 6 m bar weighs 19.8 kg and a 12 m bar 39.6 kg.
How many metres of Square tube 40×40×3 are in one tonne?
One tonne contains about 302.7 metres.