Material Weight Calculator
Find the weight of any material in any shape. Choose a material, from steel and aluminum to brass, copper, titanium, plastic, wood, or glass, pick a shape, and enter the dimensions. You get volume, weight per piece, total weight, lb/ft and kg/m, plus cost and a printable, exportable cut list.
Length, quantity, material and cost
Cut list and estimate
How to calculate the weight of any material
Weight is volume times density. Work out the volume of the shape from its dimensions, multiply by the material density, and you have the weight. For a constant cross-section, the cross-sectional area times the density gives a per-foot or per-metre figure you can scale to any length.
This calculator does that for ten materials and a dozen shapes, in imperial or metric, and reports volume, weight per piece, total weight, lb/ft, kg/m, lb/in and weight per part, plus cost and a printable, exportable cut list.
Material density chart
| Material | Density (kg/m³) | Density (lb/in³) |
|---|---|---|
| Steel | 7,850 | 0.284 |
| Stainless steel | 8,000 | 0.289 |
| Aluminum | 2,700 | 0.098 |
| Brass | 8,500 | 0.307 |
| Copper | 8,960 | 0.324 |
| Titanium | 4,500 | 0.163 |
| Plastic (PVC/acrylic) | 1,200 | 0.043 |
| Wood (oak) | 700 | 0.025 |
| Glass | 2,500 | 0.090 |
Same bar, different materials
Weight of a 1 inch round bar, one foot long, by material:
| Material | Weight per foot |
|---|---|
| Copper | 3.05 lb/ft |
| Brass | 2.89 lb/ft |
| Steel | 2.67 lb/ft |
| Titanium | 1.53 lb/ft |
| Aluminum | 0.92 lb/ft |
| Plastic | 0.41 lb/ft |
Why material choice changes the weight so much
Copper and brass are roughly three times as dense as aluminum, and titanium sits in between at a little over half the weight of steel, which is why it is prized where strength-to-weight matters. Plastics and wood are a fraction of any metal. When you are estimating shipping, handling, or structural load, the material matters as much as the size, so it pays to price and weigh the real material rather than assuming steel.
Frequently asked questions
Choose Custom density and enter the value in kg/m³. Any solid or hollow shape will then use it.
Yes. Aluminum is about 2,700 kg/m³ against 7,850 for steel, so the same shape weighs roughly 34 percent as much.
Add each material and size to the cut list, enter a cost per pound or per kilogram, and the calculator totals the weight and cost. Export the list to CSV or print an estimate.
Yes. Switch the units to metric and enter dimensions in millimetres and lengths in metres; results come back in kilograms and kg/m.