Steel Plate Weight Calculator
Calculate the weight of a flat rectangular plate from its dimensions and material density — steel, aluminum, stainless, or any metal you specify.
Enter your values
Plate dimensions and material density.
How this calculator works
Weight of a rectangular plate is simply its volume multiplied by material density:
L is length, B is width, t is thickness (all converted to meters internally), and ρ is material density in kg/m³. Multiply by quantity for a batch of identical plates.
Common material densities
| Material | Density (kg/m³) |
|---|---|
| Mild / carbon steel | 7,850 |
| Stainless steel (304/316) | ~8,000 |
| Aluminum | ~2,700 |
| Copper | ~8,960 |
| Brass | ~8,730 |
These are typical reference values — for precise work, use the specific alloy's datasheet density.
Frequently asked questions
Does this account for cut-outs or holes in the plate?
No — this calculates the weight of a solid rectangular blank. Subtract the volume of any holes or cut-outs separately if you need net finished weight.
Can I use this for checkered or textured plate?
Use the plate's nominal (average) thickness as published by the mill — checkered plate datasheets typically already state an effective thickness for weight calculation purposes.