What density does this calculator use for iron sheet?

The default is 7850 kg/m³, which is the standard density for mild steel and commercial flat iron sheet. You can also select galvanized iron (7800 kg/m³), cast iron (7200 kg/m³), or enter a custom density for specialty alloys.

What is the formula for iron sheet weight?

Weight (kg) = Length (m) × Width (m) × Thickness (m) × Density (kg/m³). The calculator converts whatever units you select into meters before applying the formula.

How do I calculate the weight of multiple sheets?

Enter the number of sheets in the Quantity field. The calculator multiplies the single-sheet weight by that number and shows both the per-sheet and total weight.

What is the difference between iron sheet and mild steel sheet?

In practice, "iron sheet" and "mild steel sheet" refer to the same low-carbon steel product sold in flat form. Both have a density near 7850 kg/m³. Pure wrought iron is rarely used today.

Can I use inches and feet instead of millimeters?

Yes. Each dimension field has its own unit selector. You can mix units — for example, length in feet, width in inches, and thickness in mm — and the calculator converts everything correctly.

Why does actual sheet weight differ from the calculated value?

Calculated weight is based on nominal dimensions and standard density. Real sheets may differ slightly due to rolling tolerances, surface coatings (e.g., galvanizing adds ~0.3–0.5% mass), and density variation between heats.

Iron Sheet Weight Calculator

Enter the length, width, and thickness of an iron or mild steel sheet to get its weight in kilograms and pounds instantly.

Sheet Dimensions

Length

Width

Thickness

Grade / Material

Quantity (sheets)

Formula Reference

W = L × W × T × ρ

Where L = length (m), W = width (m), T = thickness (m), ρ = density (kg/m³). Result is weight in kg. Standard mild iron density: 7850 kg/m³.

Enter sheet dimensions on the left and click Calculate.

Iron & Steel Sheet Densities

Grade	kg/m³	lb/in³
Mild Steel / Flat Iron	7850	0.284
Galvanized Iron Sheet	7800	0.282
Cast Iron	7200	0.260
Alloy Steel	7750	0.280
Stainless Steel 304	7930	0.286
Stainless Steel 316	8000	0.289

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Summary

Enter the length, width, and thickness of an iron or mild steel sheet to get its weight in kilograms and pounds instantly.

How it works

Enter the sheet length and select your preferred unit (mm, cm, m, in, or ft).
Enter the sheet width in the same or a different unit.
Enter the sheet thickness — typically in mm or inches for sheet products.
Select the iron or steel grade from the dropdown to apply the correct density.
Optionally enter a quantity to calculate total weight for multiple sheets.
Click Calculate Weight to see the result in kg and lb with a full dimension breakdown.

Use cases

Estimating iron sheet weight for fabrication, welding, and construction projects.
Calculating freight and shipping weight for flat iron plate orders.
Checking whether a cutting table or press can safely hold a stack of sheets.
Preparing accurate bill of materials (BOM) entries for procurement.
Comparing weight differences between mild steel, galvanized iron, and cast iron grades.
Quick checks for structural load and lifting sling capacity planning.

Frequently Asked Questions

Last updated: 2026-09-19 · Reviewed by Nham Vu