Metal · Weight
Steel square tube weight per metre
A 40 × 40 × 3 mm steel square tube weighs 3.485 kg per metre (2.342 lb/ft): the area of its section, 444 mm², times the density, 7850 kg/m³ (carbon steel).
Steel square tube weight chart
| Size, mm | kg/m | lb/ft | Area, mm² | 6 m bar, kg |
|---|---|---|---|---|
| 20 × 20 × 1.5 | 0.871 | 0.586 | 111 | 5.228 |
| 20 × 20 × 2 | 1.130 | 0.760 | 144 | 6.782 |
| 25 × 25 × 2 | 1.444 | 0.971 | 184 | 8.666 |
| 30 × 30 × 2 | 1.758 | 1.182 | 224 | 10.55 |
| 30 × 30 × 3 | 2.543 | 1.709 | 324 | 15.26 |
| 40 × 40 × 2 | 2.386 | 1.604 | 304 | 14.32 |
| 40 × 40 × 3 | 3.485 | 2.342 | 444 | 20.91 |
| 40 × 40 × 4 | 4.522 | 3.038 | 576 | 27.13 |
| 50 × 50 × 3 | 4.427 | 2.975 | 564 | 26.56 |
| 50 × 50 × 4 | 5.778 | 3.882 | 736 | 34.67 |
| 60 × 60 × 3 | 5.369 | 3.608 | 684 | 32.22 |
| 60 × 60 × 4 | 7.034 | 4.726 | 896 | 42.20 |
| 80 × 80 × 4 | 9.546 | 6.414 | 1216 | 57.27 |
| 100 × 100 × 4 | 12.058 | 8.102 | 1536 | 72.35 |
| 100 × 100 × 5 | 14.915 | 10.022 | 1900 | 89.49 |
Each size opens the calculator with it, for any length, quantity or material.
- Worked out with sharp corners. Rolled hollow sections (EN 10219, EN 10210) have rounded corners and weigh a few per cent less, more so with thick walls: for anything ordered or designed by weight, use the manufacturer's table.
- Density 7850 kg/m³, the calculator's typical value for carbon steel; a figure from the supplier's data sheet beats it.
How it is worked out
Weight per metre = area of the section × density. For 40 × 40 × 3 mm the area is 444 mm², so 444 × 7850 ÷ 10⁶ = 3.485 kg/m. A piece is that times its length in metres.
Other weight charts
Steel round bar and TMT rebar weight per metre · Steel plate and sheet weight per square metre · Aluminium sheet and plate weight per square metre · Stainless steel sheet weight per square metre (304) · Aluminium round bar weight per metre · Steel square tube weight per metre · Steel round tube and pipe weight per metre · Steel flat bar weight per metre · Steel equal angle weight per metre
Questions people ask
- How much does 40 × 40 × 3 mm steel square tube weigh per metre?
- 3.485 kg (2.342 lb per foot). A 6 m length weighs 20.91 kg.
- What is the weight of 30 × 30 × 2 mm steel square tube?
- 1.758 kg per metre. A 6 m length, 10.55 kg.
- How do you calculate the weight of steel square tube?
- Section area (mm²) × density (7850 kg/m³) ÷ 10⁶ = kg per metre.