How to Calculate Steel Weight (Formula & Examples)
Steel weight equals volume × density. Use 7850 kg/m³ (7.85 g/cm³) for carbon steel, then multiply by length and quantity in the calculator.
Core formula
Weight = Volume × Density. Typical steel density is ~7850 kg/m³.
If dimensions are in mm, convert to meters before computing volume.
Quick example
Plate: 2m × 1m × 10mm (0.01m). Volume = 0.02m³. Weight ≈ 0.02×7850 = 157kg.
FAQ
Is it 100% accurate? It’s an estimate—standards, density, and tolerances vary. Confirm supplier specs.
Which density should I use? Often 7.85 g/cm³ (7850 kg/m³) for steel.
How do I get weight per meter for sections? Best: open the size page in the catalog or use the calculator.