Copper, Brass and Bronze Weight

From alloy to weight

Copper, brass and bronze have different densities. Check the UNS designation of your material first. Presets cover electrolytic copper C11000, tellurium copper C14500, brass C26000 and phosphor bronze C51000. Select manual entry for another alloy or a density stated on your material certificate.

Section and length

For plate and flat bar, multiply width by thickness to obtain the section area. Round bar uses the circle area and tube uses the difference between two circles. Enter the distance across flats for a hexagon. Area times length times density gives the mass of one piece. Multiply by quantity for the total.

Example and limits

A 20 mm square C26000 bar with a length of 2 m weighs 6.824 kg at the typical density of 8530 kg/m³. Dimensional tolerances and composition affect the actual mass. The calculation does not replace weighing or material certification.

Flat bar with a custom density

For an example flat bar, enter density as 8400 kg/m³, width as 50 mm, thickness as 4 mm, length as 1.5 m and quantity as 3. Density is a user selected example input here, not a certified property of a particular alloy. Section area is 50 × 4 = 200 mm², or 0.0002 m². Mass per length is 8400 × 0.0002 = 1.68 kg/m. A single piece has mass 1.68 × 1.5 = 2.52 kg. Total mass is 2.52 × 3 = 7.56 kg.

If the length field already contains the total order length, do not multiply by quantity again. For pieces of different lengths with the same section and material, calculate each length separately and add their masses. Tube wall thickness is radial, so subtracting it only once from the outside diameter does not give the bore diameter. Across corners and across flats are different hexagon measurements. The calculation assumes a uniform, constant section. Account separately for material removed by holes, grooves or chamfers. The result in kg is mass. Packaging for shipment and cutting scrap for manufacture are not automatically added to this geometric total.

Frequently asked questions

How do you calculate copper weight in kg?

With an example density of 8900 kg/m³, 2 copper sheets measuring 1000 mm wide, 2 mm thick and 1 m long weigh 35.6 kg. Multiply volume by density, allowing for dimensional tolerances and alloy composition when comparing the theoretical result with an actual weighing.

Calculate with these values