What density is used for aluminum?

The default density is 2.70 g/cm³ (2700 kg/m³), which covers common structural alloys such as 6061-T6 and 6063-T5. You can enter a custom density for other alloys (e.g., 2.66 g/cm³ for 1100 series or 2.81 g/cm³ for 2024).

How is the I-beam cross-section area calculated?

The I-beam area uses the formula: Area = 2 × (flange width × flange thickness) + (web thickness × (height − 2 × flange thickness)). This counts both top and bottom flanges plus the web between them.

How is the rectangular beam area calculated?

For a solid rectangular beam the area is simply width × height. All material is assumed solid — use the I-beam type for hollow sections.

What units are supported?

Metric (millimeters for cross-section, meters for length, kilograms for weight) and imperial (inches for cross-section, feet for length, pounds for weight). Switch with the unit toggle and all labels update instantly.

Can I get the linear weight (kg/m)?

Yes. The results panel shows both total weight and linear weight per unit length, which is useful for ordering standard stock lengths.

Why does web thickness matter for I-beams?

The web is the vertical plate connecting the two flanges. Its thickness and height directly affect the cross-sectional area and therefore the weight. Thicker webs add significant mass in longer beams.

Aluminum Beam Weight Calculator

Name: Aluminum Beam Weight Calculator
Availability: InStock
Author: Nham Vu

Enter beam type, flange, web, and length dimensions to instantly calculate the weight of an aluminum I-beam or rectangular beam.

Beam Dimensions

Units:

Beam type

Overall height (mm)

Flange width (mm)

Flange thickness (mm)

Web thickness (mm)

Beam length (m)

Density (g/cm³ — default 2.70 for 6061/6063)

Cross-Section Diagram

Enter dimensions and click Calculate

Summary

Enter beam type, flange, web, and length dimensions to instantly calculate the weight of an aluminum I-beam or rectangular beam.

How it works

Select beam type: I-beam (H-section) or rectangular solid beam.
Enter the overall height and flange width of the beam.
For I-beams, also enter the flange thickness and web thickness.
Enter the total beam length.
Choose metric (mm/m/kg) or imperial (in/ft/lb) units.
Click Calculate to see total weight, linear weight, cross-section area, and volume.

Use cases

Estimate shipping and handling weight for aluminum structural profiles.
Calculate material cost for fabrication and machining projects.
Verify supplier weight specs against your own dimension measurements.
Plan structural load calculations in lightweight frame designs.
Compare I-beam vs. rectangular beam options for a given weight budget.
Quick field estimation for construction, aerospace, and marine applications.
Determine forklift or crane load limits before lifting.
Cross-check BOM weights for procurement and logistics.

Frequently Asked Questions

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