Steel Weight Calculator
Estimate steel weight for bars, plates, pipes, and angles using volume × density. Results are shown in kg, metric tons, and lb.
How Steel Weight Is Calculated
Steel weight is estimated using the relationship between volume and density. For each shape, we calculate the cross‑sectional area, multiply by length (or use length × width × thickness for plates), then multiply by the density of steel.
Steel Weight Formula Explained
The core formula is: Weight = Volume × Density. This calculator uses a default density of 7850 kg/m³, which is common for carbon steel. You can adjust density for stainless steel or other metals.
Common Steel Shapes
- Round bar: π × (d/2)² × length
- Square bar: side² × length
- Flat bar: width × thickness × length
- Plate: length × width × thickness
- Pipe: π × (R² − r²) × length
- Angle: simplified approximation (for quick estimating)
FAQ
iHow do you calculate steel weight?
Compute the steel volume from dimensions, then multiply by density. Multiply by quantity for total weight.
What is the density of steel?
A common value is about 7850 kg/m³ for carbon steel. Stainless steel can be slightly different depending on alloy.
How do I calculate round bar weight?
Use volume = π × (d/2)² × length, then multiply by density to get weight per piece.
How do I calculate pipe weight?
Pipe volume uses the difference between the outer and inner circle areas: π × (R² − r²) × length.
Is this steel weight calculator accurate?
It’s a practical estimate based on geometry and density. Real weights can vary by manufacturing tolerances, coatings, and material grade.
Disclaimer
This calculator provides an estimate only. Actual weights can vary due to tolerances, material grade, coatings, and rounding. Always confirm with supplier specifications for critical projects.