Brass & copper weight calculator rod, sheet, busbar and tube.
Copper weighs 8.94 g/cm³ and free-cutting brass about 8.50 g/cm³, both heavier than steel. A 25 mm round brass rod weighs 4.17 kg per metre, a 25 mm hex brass rod 4.60 kg/m, and a 50 × 10 mm copper busbar 4.47 kg/m. Choose the shape and alloy below, or use the charts further down.
Material detailsDensity: 7.85 g/cm³
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Theoretical weight from nominal size and density. Actual weight varies within mill tolerances.
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Density of copper, brass and bronze grades
Brass and copper rod weight per metre
Free-cutting brass C36000 at 8.50 g/cm³ (round and hex across flats), copper at 8.94 and phosphor bronze C51000 at 8.86 g/cm³.
| Size | Brass round | Brass hex | Copper round | Phosphor bronze round |
|---|---|---|---|---|
| 3 mm | 0.060 | 0.066 | 0.063 | 0.063 |
| 4 mm | 0.107 | 0.118 | 0.112 | 0.111 |
| 5 mm | 0.167 | 0.184 | 0.176 | 0.174 |
| 6 mm | 0.240 | 0.265 | 0.253 | 0.251 |
| 8 mm | 0.427 | 0.471 | 0.449 | 0.445 |
| 10 mm | 0.668 | 0.736 | 0.702 | 0.696 |
| 12 mm | 0.961 | 1.060 | 1.011 | 1.002 |
| 16 mm | 1.709 | 1.884 | 1.797 | 1.781 |
| 20 mm | 2.670 | 2.944 | 2.809 | 2.783 |
| 25 mm | 4.172 | 4.601 | 4.388 | 4.349 |
| 32 mm | 6.836 | 7.538 | 7.190 | 7.126 |
| 40 mm | 10.681 | 11.778 | 11.234 | 11.134 |
| 50 mm | 16.690 | 18.403 | 17.554 | 17.397 |
| 63 mm | 26.497 | 29.217 | 27.868 | 27.619 |
| 75 mm | 37.552 | 41.407 | 39.496 | 39.142 |
| 100 mm | 66.759 | 73.612 | 70.215 | 69.586 |
Copper busbar weight chart
Copper flat / busbar weight per metre and per 3 m length, with the aluminium busbar of the same size for comparison.
| Size W × T | Copper kg/m | Copper 3 m length, kg | Aluminium kg/m |
|---|---|---|---|
| 12 × 2 mm | 0.215 | 0.64 | 0.065 |
| 15 × 3 mm | 0.402 | 1.21 | 0.122 |
| 20 × 3 mm | 0.536 | 1.61 | 0.162 |
| 20 × 5 mm | 0.894 | 2.68 | 0.270 |
| 25 × 3 mm | 0.671 | 2.01 | 0.203 |
| 25 × 5 mm | 1.118 | 3.35 | 0.338 |
| 25 × 6 mm | 1.341 | 4.02 | 0.405 |
| 30 × 5 mm | 1.341 | 4.02 | 0.405 |
| 40 × 5 mm | 1.788 | 5.36 | 0.540 |
| 40 × 6 mm | 2.146 | 6.44 | 0.648 |
| 40 × 10 mm | 3.576 | 10.73 | 1.080 |
| 50 × 5 mm | 2.235 | 6.71 | 0.675 |
| 50 × 6 mm | 2.682 | 8.05 | 0.810 |
| 50 × 10 mm | 4.470 | 13.41 | 1.350 |
| 60 × 10 mm | 5.364 | 16.09 | 1.620 |
| 75 × 10 mm | 6.705 | 20.12 | 2.025 |
| 80 × 10 mm | 7.152 | 21.46 | 2.160 |
| 100 × 10 mm | 8.940 | 26.82 | 2.700 |
| 100 × 12 mm | 10.728 | 32.18 | 3.240 |
| 125 × 10 mm | 11.175 | 33.53 | 3.375 |
| 150 × 10 mm | 13.410 | 40.23 | 4.050 |
Copper and brass sheet weight
| Thickness | Copper kg/m² | Brass kg/m² | Copper 1,000 × 2,000, kg | Brass 8 × 4 ft, kg |
|---|---|---|---|---|
| 0.3 mm | 2.68 | 2.55 | 5.36 | 7.59 |
| 0.5 mm | 4.47 | 4.25 | 8.94 | 12.65 |
| 0.8 mm | 7.15 | 6.80 | 14.30 | 20.24 |
| 1 mm | 8.94 | 8.50 | 17.88 | 25.30 |
| 1.5 mm | 13.41 | 12.75 | 26.82 | 37.95 |
| 2 mm | 17.88 | 17.00 | 35.76 | 50.61 |
| 3 mm | 26.82 | 25.50 | 53.64 | 75.91 |
| 4 mm | 35.76 | 34.00 | 71.52 | 101.21 |
| 5 mm | 44.70 | 42.50 | 89.40 | 126.51 |
| 6 mm | 53.64 | 51.00 | 107.28 | 151.82 |
| 10 mm | 89.40 | 85.00 | 178.80 | 253.03 |
Formulas: brass round rod D² × 0.006676 kg/m, brass hex AF² × 0.007361 kg/m, copper busbar W × T × 0.00894 kg/m, sheet thickness × density kg/m². For hex sizes in steel see the hex bar weight chart.
Reference basis: Compiled by Steel Impex India. Check each table’s source, product form and delivery condition before use. Sources, calculation methods and corrections.
Frequently asked questions
What is the density of brass and copper?
Copper (ETP, DHP, OF) is 8.94 g/cm³. Common brasses range from 8.39 (60/40 Muntz metal) to 8.53 (70/30 cartridge brass), free-cutting brass C36000 is 8.50, and high-copper brasses such as 85/15 red brass are about 8.75. Phosphor bronze is about 8.8 to 8.9 and aluminium bronze 7.45 to 7.6 g/cm³.
How do you calculate the weight of a brass rod?
Round rod: D² × 0.006676 kg/m for brass at 8.50 g/cm³, with D in mm. Hex rod: AF² × 0.007361 kg/m. A 20 mm round brass rod weighs 2.67 kg/m.
How do you calculate copper busbar weight per metre?
Width (mm) × thickness (mm) × 0.00894 kg/m. A 25 × 3 mm busbar weighs 0.67 kg/m, 50 × 6 mm 2.68 kg/m and 100 × 10 mm 8.94 kg/m.
How do you calculate copper sheet weight?
Length (m) × width (m) × thickness (mm) × 8.94. A 1 mm copper sheet weighs 8.94 kg/m², so a 1,000 × 2,000 mm sheet weighs 17.9 kg.
Is brass heavier than steel?
Yes. Brass at about 8.5 g/cm³ is roughly 8% heavier than mild steel at 7.85, and copper at 8.94 is about 14% heavier.
Can I use one density for all brass grades?
Use a clearly labelled estimate only for planning. Brass compositions and densities vary; confirm the specified alloy density for a more exact calculation and agree actual weighed quantity for billing.