How do you calculate the weight of a metal sheet or plate?

The formula is: Weight = Length (m) × Width (m) × Thickness (mm) × Density (g/cm³) . For standard Mild Steel with a density of 7.85 g/cm³, a 1m × 1m × 1mm sheet weighs exactly 7.85 kg.

What is the formula for calculating round bar or pipe weight?

For a solid round bar: Weight = π × (Radius)² × Length × Density or simplified for steel: D² × L / 162 (where D is diameter in mm and L is length in meters). For hollow round pipes: Weight = π × (Outer Diameter − Thickness) × Thickness × Length × Density .

What are the standard densities of common metals?

Mild Steel: 7.85 g/cm³, Stainless Steel (SS 304): 7.93 g/cm³, Aluminum: 2.70 g/cm³, Copper: 8.96 g/cm³, Brass: 8.50 g/cm³, Cast Iron: 7.20 g/cm³, Lead: 11.34 g/cm³.

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Quick Rule of Thumb:

Standard Mild Steel sheet of 1 meter × 1 meter × 1 millimeter weighs approximately 7.85 kg.