Brass first — CW614N, CW617N, C36000 and 13 more grades — plus copper, aluminium and steel: instant weight of round, hex, square, octagon or rectangular bar, plate and hollow rod, per piece, per metre and per batch, in kg or lb.
Estimate the weight of round, hex, square, octagon or rectangular bar, plate and hollow rod (tube) stock by alloy — brass, copper, aluminium or steel — in kg or lb. Useful for costing raw material, freight and per-piece yield.
Densities as on each datasheet (mid-range where a range is given); actual mass varies with exact composition and tolerance. Round: π·(d/2)²·L. Hex: (√3/2)·AF²·L. Square: side²·L. Octagon: 2(√2−1)·AF²·L. Rectangle: W·T·L. Hollow rod: π/4·(OD²−ID²)·L.
Reference: alloy densities as on each datasheet in the materials & alloys library (Copper Development Association, Kupferverband/DKI; the EN standards set no density value). Where a range is given, the calculator uses its middle. Steel: 7.85 g/cm³ for carbon steel (EN 1993-1-1), 7.9 and 8.0 g/cm³ for 1.4301 / 304 and 1.4401 / 316 stainless (EN 10088-1). Conversions: 1 in = 25.4 mm, 1 lb = 453.592 g.
Bar weight is cross-sectional area × length × density: round π·(d/2)²·L·ρ, hex (√3/2)·AF²·L·ρ, square side²·L·ρ, octagon 2(√2−1)·AF²·L·ρ ≈ 0.8284·AF²·L·ρ (AF = across flats), rectangle W·T·L·ρ, hollow rod π/4·(OD²−ID²)·L·ρ. Densities are the values on each alloy’s datasheet (mid-range where a range is given) — see the materials library for full datasheets.
Ø20 mm CW614N round bar, 1 metre: area = π×(1 cm)² = 3.1416 cm² → 3.1416 × 100 cm × 8.47 g/cm³ ≈ 2661 g ≈ 2.66 kg/m. The same bar in lead-free CW724R (8.28–8.30) weighs 2.60–2.61 kg/m — about 2% less, which matters at tender volumes.
Brass is quoted against metal value: raw material is often 60–80% of a turned part's cost. Weight per piece × alloy rod price gives your material floor price; weight per metre tells you the yield per 3 m bar including cut-off and facing losses. We quote parts to your drawing with material, machining and finishing broken out on request.
Last reviewed: September 2026. Calculator outputs are estimates; verify against the governing standard and your drawing for procurement-critical work.
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