Metal weight

Flat bar 80×4 mm weight

Steel Flat bar 80×4 weighs 2.51 kg/m. A 6 m bar weighs 15.1 kg and a 12 m bar 30.1 kg. Values are theoretical, for a density of 7.85 g/cm³.

Weight per metre2.51kg/m
6 m bar15.1kg
12 m bar30.1kg
Metres per tonne398.1m
Painting surface0.168m²/m
80 × 4 mm
Width × thickness
80 × 4 mm
Section area
3.20 cm²
Outer surface
0.168 m²/m
Outer surface
0.168 m²/m

Weight by length

LengthSteelStainless 304Aluminium
1 m2.51 kg2.54 kg0.86 kg
2 m5.02 kg5.08 kg1.73 kg
3 m7.54 kg7.61 kg2.59 kg
4 m10.05 kg10.15 kg3.46 kg
5 m12.56 kg12.69 kg4.32 kg
6 m15.07 kg15.23 kg5.18 kg
8 m20.10 kg20.30 kg6.91 kg
10 m25.12 kg25.38 kg8.64 kg
12 m30.14 kg30.45 kg10.37 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 80×4, the section area is 3.20 cm², so 1 metre = 3.20 × 0.785 = 2.512 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 80×3Flat bar 80×4Flat bar 80×5Flat bar 80×6Flat bar 80×8Flat bar 80×10Flat bar 80×12Flat bar 80×15Flat bar 80×20Flat bar 80×25Flat bar 80×30Flat bar 12×4Flat bar 15×4Flat bar 16×4Flat bar 20×4Flat bar 25×4Flat bar 30×4Flat bar 35×4Flat bar 40×4Flat bar 45×4Flat bar 50×4Flat bar 60×4Flat bar 70×4Flat bar 90×4Full table →

Working out a whole order?

Add Flat bar 80×4 to the materials list and see the total weight and cost of the order, together with the other products.

Add to the materials list

Frequently asked questions

How much does one metre of Flat bar 80×4 weigh?

One metre of steel Flat bar 80×4 weighs 2.51 kg.

How much does a 6 m bar of Flat bar 80×4 weigh?

A 6 m bar weighs 15.1 kg and a 12 m bar 30.1 kg.

How many metres of Flat bar 80×4 are in one tonne?

One tonne contains about 398.1 metres.