Metal weight

Flat bar 120×3 mm weight

Steel Flat bar 120×3 weighs 2.83 kg/m. A 6 m bar weighs 17.0 kg and a 12 m bar 33.9 kg. Values are theoretical, for a density of 7.85 g/cm³.

Weight per metre2.83kg/m
6 m bar17.0kg
12 m bar33.9kg
Metres per tonne353.9m
Painting surface0.246m²/m
120 × 3 mm
Width × thickness
120 × 3 mm
Section area
3.60 cm²
Outer surface
0.246 m²/m
Outer surface
0.246 m²/m

Weight by length

LengthSteelStainless 304Aluminium
1 m2.83 kg2.85 kg0.97 kg
2 m5.65 kg5.71 kg1.94 kg
3 m8.48 kg8.56 kg2.92 kg
4 m11.30 kg11.42 kg3.89 kg
5 m14.13 kg14.27 kg4.86 kg
6 m16.96 kg17.13 kg5.83 kg
8 m22.61 kg22.84 kg7.78 kg
10 m28.26 kg28.55 kg9.72 kg
12 m33.91 kg34.26 kg11.66 kg

How it was calculated

The weight is the section area multiplied by the material density:

kg/m = width × thickness × 0.00785, in mm.

For Flat bar 120×3, the section area is 3.60 cm², so 1 metre = 3.60 × 0.785 = 2.826 kg.

The real weight can differ by a few percent because of rolling tolerances. For other materials or lengths use the calculator.

Other flat bar sizes

Flat bar 120×3Flat bar 120×4Flat bar 120×5Flat bar 120×6Flat bar 120×8Flat bar 120×10Flat bar 120×12Flat bar 120×15Flat bar 120×20Flat bar 120×25Flat bar 120×30Flat bar 12×3Flat bar 15×3Flat bar 16×3Flat bar 20×3Flat bar 25×3Flat bar 30×3Flat bar 35×3Flat bar 40×3Flat bar 45×3Flat bar 50×3Flat bar 60×3Flat bar 70×3Flat bar 80×3Full table →

Working out a whole order?

Add Flat bar 120×3 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 Flat bar 120×3 weigh?

One metre of steel Flat bar 120×3 weighs 2.83 kg.

How much does a 6 m bar of Flat bar 120×3 weigh?

A 6 m bar weighs 17.0 kg and a 12 m bar 33.9 kg.

How many metres of Flat bar 120×3 are in one tonne?

One tonne contains about 353.9 metres.