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Metal weight

Square tube 300×300×12.5 mm weight

Steel Square tube 300×300×12.5, cold-formed (EN 10219), weighs 107.58 kg/m. A 6 m bar weighs 645.5 kg and a 12 m bar 1,291.0 kg. The hot-finished version (EN 10210) has tighter corners and weighs 111.53 kg/m. Values are theoretical, for a density of 7.85 g/cm³.

Weight per metre107.58kg/m
6 m bar645.5kg
12 m bar1,291.0kg
Metres per tonne9.3m
Painting surface1.136m²/m
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300 × 300 × 12.5 mm
Side
300 mm
Wall thickness
12.5 mm
Cold-formed, EN 10219
107.58 kg/m
Hot-finished, EN 10210
111.53 kg/m
Section area
137.04 cm²
Outer surface
1.136 m²/m
Outer surface
1.136 m²/m

Weight by length

LengthSteelStainless 304Aluminium
1 m107.58 kg108.68 kg37.00 kg
2 m215.16 kg217.35 kg74.00 kg
3 m322.74 kg326.03 kg111.01 kg
4 m430.32 kg434.70 kg148.01 kg
5 m537.90 kg543.38 kg185.01 kg
6 m645.48 kg652.05 kg222.01 kg
8 m860.63 kg869.41 kg296.01 kg
10 m1,075.79 kg1,086.76 kg370.02 kg
12 m1,290.95 kg1,304.11 kg444.02 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 300×300×12.5, the section area is 137.04 cm², so 1 metre = 137.04 × 0.785 = 107.579 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 300×300×5Square tube 300×300×6Square tube 300×300×8Square tube 300×300×10Square tube 300×300×12.5Square tube 90×90×12.5Square tube 100×100×12.5Square tube 120×120×12.5Square tube 140×140×12.5Square tube 150×150×12.5Square tube 160×160×12.5Square tube 180×180×12.5Square tube 200×200×12.5Square tube 250×250×12.5Full table →

Working out a whole order?

Add Square tube 300×300×12.5 to the materials list and see the total weight and cost of the order, together with the other products.

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Frequently asked questions

How much does one metre of Square tube 300×300×12.5 weigh?

One metre of steel Square tube 300×300×12.5 weighs 107.58 kg.

How much does a 6 m bar of Square tube 300×300×12.5 weigh?

A 6 m bar weighs 645.5 kg and a 12 m bar 1,291.0 kg.

How many metres of Square tube 300×300×12.5 are in one tonne?

One tonne contains about 9.3 metres.