Sheet Metal Weight Calculator

Work out sheet metal weight instantly with clear inputs, formula shown and shareable results.

About Sheet Metal Weight Calculator

Sheet weight per square metre is thickness in millimetres times specific gravity, because one millimetre of a material with density 1 g/cm³ weighs exactly 1 kg/m². Mild steel therefore gives 7.85 kg/m² per millimetre, stainless 8.00 and aluminium 2.70.

Formulas

Weight per area

kg/m² = thickness mm x specific gravity

Sheet weight

kg = length m x width m x kg/m²

Worked example

With the default values below, Sheet Metal Weight Calculator returns Sheet weight of 36.797. Change any input above and every figure here is recalculated in your browser.

Inputs used

Sheet lengthminimum 1 mm: 2,500 mm
Sheet widthminimum 1 mm: 1,250 mm
Sheet thicknessminimum 0.05 mm: 1.5 mm
Materialone of Mild steel — 7.85 g/cm³, Stainless steel — 8.00 g/cm³, Aluminium — 2.70 g/cm³: Mild steel — 7.85 g/cm³

Results

Sheet weight: 36.797 kg
Weight per square metre: 11.775 kg/m²
Sheet area: 3.125 m²
Sheets per tonne: 27.2

Step by step

1Values used
2Weight per area
3Sheet weight
4Sheet weight= 36.797 kg
5Weight per square metre= 11.775 kg/m²
6Sheet area= 3.125 m²
7Sheets per tonne= 27.2

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is the Sheet Metal Weight figure worked out?

kg/m² = thickness mm x specific gravity. Sheet weight per square metre is thickness in millimetres times specific gravity, because one millimetre of a material with density 1 g/cm³ weighs exactly 1 kg/m².

Why is aluminium ductwork so much lighter?

At about a third the density of steel, aluminium at the same thickness weighs a third as much, which is why it is preferred where support loads or handling govern.

What values do I need to enter?

This calculator takes 4 inputs: Sheet length, Sheet width, Sheet thickness, Material. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.