Aluminum Weight Calculator

Q: What is the density of aluminum?

The density of pure aluminum is about 2.7 grams per cubic centimeter (g/cm³). However, aluminum alloys have slightly different densities. For example, Aluminum 5056 has a density of 2.64 g/cm³, while Aluminum 2011 is 2.84 g/cm³. This calculator uses the exact density for each alloy so your weight result is accurate.

Q: How do I calculate the weight of aluminum?

To calculate aluminum weight, you multiply the volume of the piece by the density of the alloy. The formula is: Weight = Volume × Density For example, a flat bar that is 10 cm × 5 cm × 100 cm has a volume of 5,000 cm³. Multiply that by 2.7 g/cm³ (for standard aluminum), and you get 13,500 grams, or 13.5 kg. This calculator does all of that math for you automatically.

Q: Which aluminum alloy should I choose if I don't know mine?

If you are not sure which alloy you have, select Aluminum 6061 . It is the most commonly used aluminum alloy in construction and general fabrication. Its density is 2.700 g/cm³, which is the same as average aluminum. This will give you a good estimate for most projects.

Q: What is the Custom Volume option?

The Custom Volume (Manual Entry) option lets you type in a volume directly in cubic centimeters (cm³). This is useful when your shape is unusual or you already know the volume from a CAD program or other source. The calculator then multiplies your volume by the alloy density to give you the weight.

Q: What is the difference between a sheet and a plate?

In the aluminum industry, a sheet is typically thinner than 6 mm (0.25 inches), while a plate is 6 mm or thicker. In this calculator, both use the same formula: Width × Length × Thickness. The distinction is provided so you can label your calculation correctly.

Q: Can I calculate the weight of aluminum wire?

Yes. Select the Wire (Small-Diameter Cylinder) shape. Enter the wire diameter and total length. The calculator treats it as a solid cylinder and gives you the weight. This works well for solid aluminum wire of any gauge.

Q: How do I find the weight of an aluminum angle?

Choose Equal Angle if both legs are the same size, or Unequal Angle if the legs differ. Enter the leg length(s), thickness, and length. The calculator uses the L-shape cross-section formula to find the volume and then the weight.

Aluminum Weight Calculator

Updated Sep 1, 2026 By Jehan Wadia

Introduction

The Aluminum Weight Calculator helps you find the weight of aluminum parts quickly and accurately. This tool calculates weight for flat bars, pipes, sheets, angles, and tubes. Just pick your aluminum alloy, choose a shape, enter your dimensions, and get instant results in kilograms, pounds, grams, and ounces.

This calculator supports 28 common aluminum alloys, including popular grades like 6061, 7075, 2024, and 5052. Each alloy has its own density, so your weight results are precise. You can also choose from over 20 shapes such as round bars, box sections, channels, tees, spheres, and more. Input your measurements in millimeters, centimeters, meters, inches, or feet, and the tool converts everything for you.

Knowing the exact weight of aluminum is important in construction, manufacturing, and fabrication. It helps you estimate material costs, plan shipping loads, and check if a design meets weight limits. Instead of doing long formulas by hand, use this calculator to save time and avoid mistakes. Enter your values below to get started.

How to Use Our Aluminum Weight Calculator

Enter details about your aluminum piece below, and this calculator will instantly show you its weight in kilograms, pounds, grams, and ounces.

Aluminum Alloy: Pick the type of aluminum you are using from the dropdown list. Each alloy has a slightly different density, which changes the final weight. If you are not sure, leave it set to Aluminum 6061.

Shape / Form: Choose the shape that matches your aluminum piece. Options include flat bar, round bar, pipe, tube, sheet, plate, angle, channel, sphere, and more. The calculator will update the dimension fields to match your chosen shape.

Quantity: Enter how many identical pieces you have. The calculator will give you both the per-piece weight and the total weight for all pieces combined.

Dimensions: Type in the measurements for your aluminum piece, such as width, thickness, length, or diameter. Use the small dropdown next to each field to pick your unit: millimeters, centimeters, meters, inches, or feet. The fields shown will change based on the shape you selected.

Press the Calculate button to see your results. Hit Reset to clear all fields and start over.

Aluminum is a lightweight, strong metal used in construction, manufacturing, and everyday products. It weighs about one-third as much as steel, which makes it a popular choice for building frames, roofing, window systems, aircraft parts, and automotive components. Knowing the exact weight of aluminum pieces before you buy or use them is important for planning, shipping, and structural safety.

This calculator helps you find the weight of aluminum based on its shape, size, and alloy type. Aluminum comes in many alloys, such as 6061, 7075, and 2024. Each alloy has a slightly different density, which means the same size piece can weigh more or less depending on the alloy. Density is how much mass fits in a given space. Pure aluminum has a density of about 2.7 grams per cubic centimeter, but alloys can range from 2.6 to 2.84 g/cm³.

The calculator supports many common shapes used in construction and fabrication. These include flat bars, round bars, sheets, plates, pipes, tubes, angles, channels, tees, box sections, spheres, and more. You enter the dimensions of your piece, pick your unit of measurement, choose your alloy, and set the quantity. The tool then calculates the volume and multiplies it by the alloy's density to give you the weight in kilograms, pounds, grams, ounces, and metric tonnes.

This is useful for engineers, builders, fabricators, and anyone working with aluminum who needs quick, accurate weight estimates without doing the math by hand.

Formulas used

Volume – Flat Bar / Sheet / Plate

V = W \times T \times L

Volume – Round Bar / Solid Cylinder / Wire

V = \pi \left(\frac{D}{2}\right)^{2} L

Volume – Hollow Pipe

V = \pi \left(r_o^{2} - r_i^{2}\right) L \quad,\; r_i = r_o - t

Volume – Hexagonal Bar / Prism

V = \frac{\sqrt{3}}{2}\, a^{2}\, L

Volume – Sphere

V = \frac{4}{3}\pi \left(\frac{D}{2}\right)^{3}

Volume – Torus (Ring)

V = 2\pi^{2} R\, r^{2}

Weight per Piece

W_{\text{piece}} = V \times \rho

Total Weight

W_{\text{total}} = W_{\text{piece}} \times Q

Frequently asked questions

What is the density of aluminum?

The density of pure aluminum is about 2.7 grams per cubic centimeter (g/cm³). However, aluminum alloys have slightly different densities. For example, Aluminum 5056 has a density of 2.64 g/cm³, while Aluminum 2011 is 2.84 g/cm³. This calculator uses the exact density for each alloy so your weight result is accurate.

How do I calculate the weight of aluminum?

To calculate aluminum weight, you multiply the volume of the piece by the density of the alloy. The formula is:

Weight = Volume × Density

For example, a flat bar that is 10 cm × 5 cm × 100 cm has a volume of 5,000 cm³. Multiply that by 2.7 g/cm³ (for standard aluminum), and you get 13,500 grams, or 13.5 kg. This calculator does all of that math for you automatically.

Which aluminum alloy should I choose if I don't know mine?

If you are not sure which alloy you have, select Aluminum 6061. It is the most commonly used aluminum alloy in construction and general fabrication. Its density is 2.700 g/cm³, which is the same as average aluminum. This will give you a good estimate for most projects.

What is the Custom Volume option?

The Custom Volume (Manual Entry) option lets you type in a volume directly in cubic centimeters (cm³). This is useful when your shape is unusual or you already know the volume from a CAD program or other source. The calculator then multiplies your volume by the alloy density to give you the weight.

How much does a 1-meter long aluminum round bar weigh?

It depends on the diameter and alloy. For example, a 6061 aluminum round bar with a 25 mm diameter and 1 meter length weighs about 1.325 kg (2.92 lb). A larger 50 mm diameter bar of the same length weighs about 5.301 kg. Enter your exact dimensions into the calculator for a precise answer.

What is the difference between a sheet and a plate?

In the aluminum industry, a sheet is typically thinner than 6 mm (0.25 inches), while a plate is 6 mm or thicker. In this calculator, both use the same formula: Width × Length × Thickness. The distinction is provided so you can label your calculation correctly.

How is the weight of a box section calculated?

A box section is a hollow rectangle or square. The calculator finds the outer area, subtracts the inner hollow area, and multiplies by the length. For a rectangular box section: Volume = (Outer Width × Outer Height − Inner Width × Inner Height) × Length. The inner dimensions are found by subtracting twice the wall thickness from the outer dimensions.

Why does the weight change when I pick a different alloy?

Different aluminum alloys have different densities. For example, Aluminum 5056 has a density of 2.64 g/cm³, while Aluminum 2011 has 2.84 g/cm³. That is about a 7.5% difference. So the same size piece will weigh more in a heavier alloy. Picking the correct alloy gives you a more accurate result.

Can I calculate the weight of aluminum wire?

Yes. Select the Wire (Small-Diameter Cylinder) shape. Enter the wire diameter and total length. The calculator treats it as a solid cylinder and gives you the weight. This works well for solid aluminum wire of any gauge.

How do I find the weight of an aluminum angle?

Choose Equal Angle if both legs are the same size, or Unequal Angle if the legs differ. Enter the leg length(s), thickness, and length. The calculator uses the L-shape cross-section formula to find the volume and then the weight.

Aluminum Weight Calculator

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Introduction

How to Use Our Aluminum Weight Calculator