What is the formula for brass plate weight?

Weight = Length × Width × Thickness × Density. Convert all dimensions to centimeters to get volume in cm³, then multiply by the alloy density in g/cm³ (8.53 for CDA 260 Cartridge Brass) for the weight in grams. Divide by 1,000 for kilograms, or multiply kg by 2.20462 for pounds.

Which brass alloy should I pick?

CDA 260 (Cartridge Brass, 8.53 g/cm³) is the most common sheet grade. CDA 360 (Free-Cutting Brass, 8.50 g/cm³) is used for machined parts. CDA 464 (Naval Brass, 8.44 g/cm³) is preferred in marine environments. If you have a data sheet with a specific density, use the "Custom" option.

How accurate is this calculator?

The result is as accurate as the input dimensions and density. Mill tolerances on thickness are typically ±5–10%, so treat the output as a close estimate rather than a certified weight. For certified weights, use a scale.

Can I calculate weight for non-rectangular plates?

This tool covers rectangular plates only. For circles or complex shapes, compute the equivalent rectangular bounding box first or use the volume directly with the density formula: Weight = Volume × Density.

What units does the calculator support?

Dimensions can be entered in millimeters (mm), centimeters (cm), inches (in), or feet (ft). All three dimension fields share the same unit selection.

Why is the result in both kg and lb?

Kilograms are the SI standard used in most engineering and international trade contexts. Pounds are common in the United States. Both are provided so you can use whichever unit your supplier or shipping carrier requires.

Brass Plate Weight Calculator

Enter length, width, thickness, and brass alloy to instantly calculate the weight of a brass plate in kg or lb.

Plate Dimensions

Dimension Unit

Length (cm)

Width (cm)

Thickness (cm)

Brass Alloy

Weight Result

Enter dimensions and click Calculate

Common Brass Alloy Densities

Alloy	Common Name	Composition (approx.)	Density (g/cm³)
CDA 260	Cartridge Brass	70% Cu, 30% Zn	8.53
CDA 280	Muntz Metal	60% Cu, 40% Zn	8.39
CDA 360	Free-Cutting Brass	61.5% Cu, 35.5% Zn, 3% Pb	8.50
CDA 464	Naval Brass	60% Cu, 39.25% Zn, 0.75% Sn	8.44
CDA 485	Naval Brass (leaded)	60% Cu, 38.75% Zn, 0.75% Sn, 0.5% Pb	8.47

Summary

Enter length, width, thickness, and brass alloy to instantly calculate the weight of a brass plate in kg or lb.

How it works

Enter the plate's length, width, and thickness in your chosen unit (mm, cm, inch, or ft).
Select the brass alloy grade from the dropdown, or choose "Custom" and enter the density manually.
Click "Calculate Weight" to compute the result.
The tool converts all dimensions to centimeters, calculates volume (L × W × T), then multiplies by density (g/cm³).
Results are displayed in kilograms, pounds, and grams for convenience.

Use cases

Estimating material cost before ordering brass sheet stock.
Checking shipping weight for fabricated brass components.
Validating structural load calculations in mechanical design.
Comparing alloy grades to find the lightest option for a given size.
Procurement and inventory weight tracking for sheet metal shops.
Academic and training exercises in materials science.

Frequently Asked Questions

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