Metal Weight Calculator
Calculate the approximate weight of metal and engineering plastic stock by material, shape and dimensions. Quickly estimate individual part weight and total order weight in kilograms or pounds.
Material Weight Calculator
Select a material and stock shape, then enter the dimensions and quantity.
Dimensions
Estimated weight is based on nominal dimensions and reference material density. Actual stock or finished-part weight can vary because of material composition, dimensional tolerance, machining allowance, holes, pockets and other removed features.
Material Density Reference
Part weight is calculated from material volume and density. The values below are typical reference densities for common CNC machining materials. Exact density can vary slightly by alloy, grade and supplier.
| Material | Approx. Density | Typical CNC Use |
|---|---|---|
| Aluminum 6061 | 2.70 g/cm³ | General CNC parts, housings, fixtures |
| Aluminum 7075 | 2.81 g/cm³ | High-strength structural parts |
| Stainless Steel 304 | 7.93 g/cm³ | General corrosion-resistant components |
| Stainless Steel 316 | 8.00 g/cm³ | Marine, chemical and corrosion-resistant parts |
| Carbon Steel | 7.85 g/cm³ | Machine components and structural parts |
| Titanium Grade 5 | 4.43 g/cm³ | High-strength lightweight components |
| Brass | 8.50 g/cm³ | Fittings, valves and precision components |
| Copper | 8.96 g/cm³ | Electrical and thermal components |
| POM / Acetal | 1.41 g/cm³ | Bushings, gears and precision plastic parts |
| PEEK | 1.30 g/cm³ | High-performance engineering components |
| PTFE | 2.20 g/cm³ | Seals and low-friction components |
| PMMA / Acrylic | 1.18 g/cm³ | Transparent covers and optical components |
| Nylon PA6 | 1.14 g/cm³ | Wear-resistant mechanical parts |
| Nylon PA66 | 1.14 g/cm³ | Mechanical and electrical components |
Metal Weight Calculator FAQ
How is metal weight calculated?
First calculate the volume of the raw material shape, then multiply the volume by the material density. The calculator performs these calculations automatically.
How accurate is the calculated weight?
The result is an estimate based on nominal dimensions and typical material density. Actual weight can vary slightly depending on alloy composition, stock tolerance and supplier data.
Can I calculate engineering plastic weight?
Yes. The calculator includes common CNC plastics such as POM, PEEK, PTFE, PMMA and nylon in addition to metal materials.
Does this calculate finished CNC part weight?
It calculates the weight of the selected basic geometry. A finished CNC part with pockets, holes, slots or other removed material will normally weigh less than the original stock.
Can I use my own material density?
Yes. Select Custom Density and enter the material density in g/cm³ if your specific alloy or plastic is not included in the list.
Need a CNC Part Manufactured?
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