Calculate metal weight instantly.Select metal, shape, quantity, dimensions & unit system from the dropdown and calculate metal weight instantly in kg and lbs. All major metals and alloys like MS, SS, Aluminium, Copper, Brass are included. A total of 23 geometric shapes are included in this calculator.
Single Unit
0.000 kg
0.000 lbs
Total (1)
0.000 kg
0.000 lbs
Est. Cost
0.00
Our free online Metal Weight Calculator allows you to quickly compute the theoretical weight of various metals and alloys based on their shape, dimensions, and material properties. Whether you are dealing with structural steel plates, aluminium tubing, or brass round bars, this tool eliminates manual mathematical errors and saves time on procurement estimation.
To determine a metal's weight, the calculator uses a fundamental two-step process:
To use the calculator for your project estimates, simply follow these four straightforward steps:
Choose your specific alloy from the dropdown menu (e.g., Carbon Steel, Aluminum 6061, Stainless 304). The tool automatically loads the correct material density in the background.
Pick the geometric profile that matches your raw material. Common options include flat plate, round bar, square tube, hexagon, or sheet metal.
Input the required measurements such as length, width, thickness, outer diameter, or wall thickness. You can toggle between imperial units (inches/feet) and metric units (millimeters/meters).
Enter the total number of pieces needed for your project. Click "Calculate" to instantly get the total estimated weight in pounds (lbs) or kilograms (kg).
If you ever need to double-check the math or calculate metal weight manually by hand, the foundational physics equation is simple:
Weight = Volume × Density
However, the way you calculate volume depends entirely on the physical profile of the metal. For a simple flat sheet or rectangular plate, you can use:
Weight = Length × Width × Thickness × Density
For more complex industrial shapes like round bars, hexagons, or hollow structural tubing, the geometric calculations vary significantly to account for inner diameters and cross-sectional areas.
Let's look at how to manually calculate the weight of a standard structural steel plate measuring 48 inches wide, 96 inches long, and 0.25 inches thick.
By utilising our calculator above, you can skip this manual math and get instant results for any custom size or alloy instantly.
Important Note: It is vital to remember that all online metal weight calculators provide a theoretical weight.
In the real world, the actual weight of the metal delivered to your job site might vary by 2% to 5% due to several manufacturing variables:
| Mild Steel | 7.85 g/cm³ |
| Carbon Steel (High) | 7.84 g/cm³ |
| Stainless Steel | 7.93 g/cm³ |
| Cast Iron | 7.20 g/cm³ |
| Aluminium | 2.70 g/cm³ |
| Copper | 8.96 g/cm³ |
| Brass | 8.40 g/cm³ |
| Gold (24k) | 19.30 g/cm³ |
| Silver | 10.50 g/cm³ |
| Platinum | 21.45 g/cm³ |
| Magnesium | 1.74 g/cm³ |
| Titanium | 4.50 g/cm³ |
| Zink | 7.13 g/cm³ |
| Nickel | 8.90 g/cm³ |
| Cobalt | 8.90 g/cm³ |
• Built for Fabricators, Engineers & Builders •