Engineering

Calculate weight

Brass Weight Calculator

Brass density sits between copper and steel, typically 8.4–8.7 g/cm³ depending on zinc content. 8.50 g/cm³ is a solid all-round figure for free-machining bar (CZ121 / C360) and common sheet.

Brass · 8.5 g/cm³

Material

Typical 60/40 or 70/30 brass. Alloys range ~8.4–8.7.

Shape

length

width

thickness

Result

0.85kg

Weight unit

Volume: 100 cm³
Volume (m³): 0.0001
Density: 8.5 g/cm³
Density: 8,500 kg/m³

V = L × W × T W = V × ρ

Why a dedicated brass page?

Turned fittings, plumbing valves, decorative plate, engraved plates and electrical terminals. For naval brass or high-zinc alloys, a custom density of 8.4 or 8.47 is sometimes specified on mill certs.

Formula

Weight (kg) = Volume (m³) × 8500. Hex bar can be modelled as a rectangular envelope minus scrap, or treated as round using across-flats as a conservative over-estimate.

Round bar Ø25 mm × 300 mm

Volume = π/4 × 0.025² × 0.300 = 1.473×10⁻⁴ m³. Weight ≈ 1.25 kg.

Alloys on this page

Brass — 8.5 g/cm³. Typical 60/40 or 70/30 brass. Alloys range ~8.4–8.7.

Leaded free-machining brass is fractionally denser than cartridge brass. If you have a mill certificate density, enter it as a custom material on the main calculator.

See the full material weight calculator for plastics, titanium, tool steels and custom densities, or jump to Steel, Aluminium, Copper, Stainless steel.

Frequently asked questions

How is metal weight calculated?+

Weight equals volume × density. Volume comes from the shape (for example length × width × thickness for a plate, or πr²L for a round bar). Density is looked up for the selected material, or entered manually for a custom alloy.

What density is used for mild steel?+

Mild steel is calculated at 7.85 g/cm³ (7850 kg/m³), which is the value most fabrication shops and steel stockholders use for estimating plate, bar and section mass.

Can I mix millimetres and inches?+

Yes. Each dimension has its own unit (mm, cm, m, inch, feet). The calculator converts everything internally to a consistent system before applying the density, then reports weight in the unit you choose.

How accurate is the result?+

The geometry is exact for the dimensions you enter. Real parts vary with mill tolerance, coating, chamfers and actual alloy density (stainless 304 vs 316, cast vs wrought aluminium). Treat the figure as a reliable estimate, not a certified weighbridge reading.

Does this include pipe schedules?+

Use the Pipe or Tube shape and enter outside diameter and wall thickness. That covers any schedule once you know OD and WT from a pipe chart.

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