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Brass Weight & Volume Calculator

Calculate weight of brass sheets, round bars, pipes, and hexagonal fittings in kg and pounds.

mm
mm
mm
₹/kg
Volume per piece
1000.0 cm³
Weight per piece
8.500 kg
Total weight
8.50 kg

How this is calculated

Volume = 1,000 × 100 × 10.0 mm³ ÷ 1000 = 1000.00 cm³

Weight = 1000.00 cm³ × 8.5 g/cm³ ÷ 1000 = 8.500 kg

Brass Weight & Volume Calculator: how it works

Sheet and plate weight is volume times density. The only thing to get right is the unit conversion.

The calculation

Weight (kg) = (L × W × T ÷ 1000) × density ÷ 1000

L, W, T in millimetres
Density in g/cm³
The first ÷1000 converts mm³ to cm³
MaterialDensity (g/cm³)
Brass8.50
Copper8.96
Mild steel7.85
Stainless 3047.93
Aluminium2.70
Lead11.34

Worked example

Worked example · Brass sheet 1000 × 100 × 10 mm

Given

  • Length: 1000 mm
  • Width: 100 mm
  • Thickness: 10 mm
  • Brass at 8.5 g/cm³

Working

  1. 1Volume = 1000 × 100 × 10 = 1,000,000 mm³
  2. 2In cm³ = 1,000,000 ÷ 1000 = 1000 cm³
  3. 3Weight = 1000 × 8.5 = 8500 g

8.5 kg

Brass grades differ

Brass is a copper-zinc alloy and its density varies with composition. Common cartridge brass at 70 percent copper is about 8.53 g/cm³; naval brass and high-zinc alloys run slightly lower. For most purposes 8.5 is close enough, but for precise work use the figure for your specific grade.

Common brass grades
GradeCompositionDensity
Cartridge brass (C26000)70% Cu, 30% Zn8.53
Muntz metal (C28000)60% Cu, 40% Zn8.39
Naval brass (C46400)60% Cu, 39% Zn, 1% Sn8.41
Free-cutting brass (C36000)61% Cu, 36% Zn, 3% Pb8.49

The difference between the extremes is under 2 percent, so for ordering purposes the distinction rarely matters. It becomes relevant when you are calculating the weight of a large consignment, where 2 percent of several tonnes is a meaningful sum.

Sections other than flat sheet

The same principle — volume times density — applies to any shape once you can express its cross-sectional area.

  • Round bar: area = π × r², so weight per metre = π × r² × density ÷ 1000 with r in mm.
  • Hexagonal bar: area = 2.598 × s², where s is the length of one face.
  • Square bar: area = side squared.
  • Tube: use the annulus area, π × t × (OD − t), exactly as for steel pipe.

Frequently asked questions

Multiply length, width and thickness in millimetres, divide by 1000 to get cubic centimetres, multiply by the density of 8.5 g/cm³, then divide by 1000 for kilograms.

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