What formula is used to calculate aluminum C-channel weight?

The cross-sectional area of a C-channel is: Area = t × (H + 2F − 2t), where H is the web height, F is the flange width, and t is the wall thickness. Weight = Area × Length × Density. This formula avoids double-counting the two flange-web corner junctions.

What is the density of aluminum 6061?

Aluminum alloy 6061 has a density of 2700 kg/m³ (0.0975 lb/in³). It is one of the most common structural aluminum alloys used for channels and extrusions.

What is the difference between 6061 and 6063 aluminum for channels?

Both alloys have nearly identical densities (2700 vs 2690 kg/m³), so weight calculations are essentially the same. The difference is in mechanical properties: 6061 is stronger, while 6063 is preferred for architectural extrusions due to better surface finish.

Can I calculate weight for multiple aluminum channel bars?

Yes. Enter the quantity in the Quantity field and the tool shows the total weight of all bars together as well as the per-bar weight for reference.

Does this tool support imperial units?

Yes. You can enter dimensions in inches, millimeters, or centimeters, and length in meters, feet, or inches. The tool converts everything to meters internally before calculating.

Why might my result differ slightly from an aluminum supplier catalogue?

Catalogue weights are theoretical values based on nominal dimensions and standard density. Minor rounding in mill tolerances, fillet radii at corners, or slightly different density assumptions can cause small discrepancies of 1–3%.

Aluminum Channel Weight Calculator

Enter web height, flange width, wall thickness, and length of an aluminum C-channel to get the weight in kg and lbs instantly.

Channel Dimensions

Web Height (H)

Vertical back wall of the C-section.

Flange Width (F)

Overall outer width of each flange, including the web thickness.

Wall Thickness (t)

Uniform thickness of web and both flanges.

Length

Aluminum Alloy

Quantity (bars)

Formula Reference

Area = t × (H + 2F − 2t)
Weight = Area × Length × ρ

Where H = web height (m), F = flange width (m), t = wall thickness (m), L = length (m), ρ = density (kg/m³).

C-Section Diagram

Enter channel dimensions on the left and click Calculate.

Aluminum Alloy Densities

Alloy	kg/m³	lb/in³
6061-T6	2700	0.0975
6063-T5	2690	0.0972
5052-H32	2680	0.0968
2024-T3	2780	0.1004
7075-T6	2810	0.1015
6082-T6	2710	0.0979
5083-H111	2660	0.0961

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Summary

This calculator computes the weight of an aluminum C-channel (C-section) using the standard cross-section formula: Area = t × (H + 2F − 2t), where H is the web height, F is the flange width, and t is the uniform wall thickness. The resulting cross-sectional area is multiplied by the bar length and the selected alloy density to produce results in both kilograms and pounds. Common aluminum alloys including 6061, 6063, 5052, and 2024 are pre-loaded.

How it works

Enter the web height (H) — the vertical back wall of the aluminum C-section.
Enter the flange width (F) — the horizontal projecting lip at the top and bottom.
Enter the wall thickness (t) — uniform thickness of both the web and flanges.
Enter the total bar length.
Select the aluminum alloy from the dropdown, or choose Custom Density for a user-defined value.
Optionally enter a quantity for multiple channel bars.
Click Calculate — the tool applies Weight = t × (H + 2F − 2t) × Length × Density and displays results in kg and lbs.

Use cases

Estimating aluminum frame weight for architectural and structural projects.
Calculating shipping and freight weight for aluminum extrusion orders.
Bill of materials (BOM) preparation for aluminum fabrication shops.
Comparing channel sizes to find the lightest design that meets load requirements.
Verifying theoretical weight against supplier mill certificates.
Checking rigging and lifting load limits before hoisting aluminum sections.
Cost estimation when pricing aluminum by weight.
Academic and exam calculations for lightweight structures and aerospace components.

Frequently Asked Questions

Last updated: 2026-05-23 · Reviewed by Nham Vu