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Square and rectangular bar weight calculator

Enter sides A and B (A = B for square) and length to get kg/m, kg/bar and paint area.

kg/m = 0.00785 × A × B

Square bar weight calculator

Enter dimensions in mm.

Theoretical weight from nominal dimensions, excluding rolling tolerance and cutting loss.

Square bar weight formula

QuantityFormulasUnit
Weight per metre0.00785 × A × Bkg/m
Square bar (A = B)0.00785 × A²kg/m

Square bar weight table

Side (mm)kg/m6 m length (kg)
8×80.5023.01
10×100.7854.71
12×121.136.78
14×141.5399.23
16×162.0112.06
20×203.1418.84
25×254.90629.44
30×307.06542.39
40×4012.5675.36
50×5019.62117.75
60×6028.26169.56
80×8050.24301.44
100×10078.5471

Frequently asked questions

How much does 20 × 20 square bar weigh per metre?

0.00785 × 20 × 20 = 3.14 kg/m.

How much does a 50 × 30 rectangular bar weigh per metre?

0.00785 × 50 × 30 = 11.77 kg/m.

What is the difference between a square bar and a square hollow section?

A square bar is solid; a square hollow section is hollow with wall thickness t. For hollow sections use the hollow section weight calculator.