Sheet Metal Weight Calculator
Same Dimensions, Very Different Weight
Cut a sheet of aluminum and a sheet of lead to identical length, width, and thickness and they'll weigh nothing alike — lead is roughly four times denser than aluminum. Sheet weight is a straightforward geometry calculation once density enters the picture, but getting the material right matters as much as getting the dimensions right.
The Formula
Weight = Volume × Density
The calculator converts millimeter dimensions to cubic centimeters before multiplying by density in g/cm³, then converts the result to both kilograms and pounds.
Worked Examples
| Dimensions | Material (density) | Volume | Weight |
|---|---|---|---|
| 1000 × 500 × 2 mm | Mild Steel (7.85 g/cm³) | 1,000 cm³ | 7.85 kg (17.31 lb) |
| 1000 × 500 × 2 mm | Aluminum (2.70 g/cm³) | 1,000 cm³ | 2.70 kg (5.95 lb) |
| 500 × 500 × 1.5 mm | Stainless 304 (8.00 g/cm³) | 375 cm³ | 3.00 kg (6.61 lb) |
The first two rows share identical dimensions but nearly a 3x weight difference — density alone accounts for it, which is why swapping material on an existing part changes weight even when nothing else about the design does.
Where This Calculation Matters
- Shipping and handling estimates — knowing sheet weight before it arrives determines what equipment and crew are needed to move it safely.
- Material cost comparisons — when metal is priced per pound, weight calculations translate directly into a purchasing decision between material options.
- Structural and design load calculations — the self-weight of sheet components factors into overall assembly weight and support requirements.
How to Use This Calculator
- Enter Length (mm), Width (mm), and Thickness (mm).
- Select the material from the list, covering common metals from mild steel to titanium.
- Select Calculate to get the weight in both kilograms and pounds.
Related Calculations
For bar and tube stock rather than flat sheet, use the Metal Weight Per Foot Calculator. To find the standard gauge number matching a given thickness, see the Metal Sheet Gauge Calculator.