Formula: thickness × width × length × density ÷ 1,000,000. Excludes rolling tolerance and coating weight.
Why Density Is Not a Fixed 2.70
A lot of calculators use 2.70 g/cm³ for everything. Across the alloys we actually ship, the spread is about 8% — enough to move a 20-tonne order by more than a tonne, and enough to make a freight quote wrong.
| Alloy | Density (g/cm³) | Alloy | Density (g/cm³) |
|---|---|---|---|
| 1050 / 1060 | 2.705 | 5083 | 2.660 |
| 1100 | 2.710 | 5754 | 2.670 |
| 3003 | 2.730 | 6061 | 2.700 |
| 3004 | 2.720 | 6063 | 2.700 |
| 5052 | 2.680 | 7075 | 2.810 |
| 5086 | 2.660 | 8011 | 2.710 |
Magnesium lowers density; copper and zinc raise it. That is why 1100 (2.710) and 5083 (2.660) bracket the range at almost the same nominal strength class.
Limitations
What This Calculator Does Not Do
- Hollow sections. Tube, pipe and hollow extrusion need the cross-sectional area, not three dimensions. Send us the drawing.
- Round bar and disc. Use πr² × length × density, or ask us — we will run it with the correct density for the grade.
- Tolerance and coating. Actual delivered weight runs slightly above nominal on thick plate and slightly below on thin foil. Coating adds 20–40 g/m² per side.
- Packing weight. A seaworthy wooden pallet with steel strapping adds 60–90 kg per pack. Ask for a packing estimate if your freight is weight-critical.