Metal Weight Calculator
Calculate the theoretical weight of brass, aluminium, copper and gun metal stock. Choose the material and shape, enter the dimensions in millimetres, centimetres, metres, inches or feet, and the result and diagram update as you type. When you are ready, send the exact configuration to us for a quotation.
Send this calculation as an enquiry
How the calculation works
Weight is volume multiplied by density. The calculator first works out the cross-sectional area of the chosen shape, multiplies it by the length (or thickness for discs and rings) to get the volume, and then multiplies by the material density. All inputs are converted to metres before calculating, so mixed units give consistent answers.
| Shape | Area |
|---|---|
| Round rod / bar | π × D² ÷ 4 |
| Square bar | A² |
| Flat bar, strip, sheet | W × T |
| Hexagonal bar | (√3 ÷ 2) × AF² |
| Round pipe / tube | π × (OD² − ID²) ÷ 4, ID = OD − 2 × WT |
| Square tube | A² − (A − 2 × WT)² |
| Rectangular tube | W × H − (W − 2 × WT) × (H − 2 × WT) |
| Equal angle | T × (2 × A − T) |
| Unequal angle | T × (A + B − T) |
| T profile | B × Tf + (H − Tf) × Tw |
| U / channel | W × Tw + 2 × Tf × (H − Tw) |
| Disc | π × D² ÷ 4 (× thickness) |
| Ring / washer | π × (OD² − ID²) ÷ 4 (× thickness) |
| Custom section | Area you enter |
Densities used
The densities below are approximate values for estimating. Real alloys and grades vary, so treat the result as a theoretical weight.
| Material | Approximate density (kg/m³) | g/cm³ |
|---|---|---|
| Brass | 8,500 | 8.50 |
| Aluminium / Silver | 2,700 | 2.70 |
| Copper | 8,960 | 8.96 |
| Gun Metal | 8,800 | 8.80 |
Accuracy
Calculated weight is theoretical and may differ from actual stock weight due to alloy composition, tolerances, manufacturing variation and finishing. Angles, T and U profiles are calculated with sharp corners; rolled or extruded sections with rounded corners will weigh slightly differently.
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