What formula is used?

Weight = (π ÷ 4) × (OD² − ID²) × Length × Density, where ID = OD − 2 × wall thickness. All dimensions are converted to meters; multiplying the volume in m³ by 2700 kg/m³ gives kilograms.

What aluminum density does this calculator use?

A density of 2700 kg/m³ is used, which is the standard value for common aluminum alloys including 6061, 6063, and 1100. High-strength alloys such as 7075 (2810 kg/m³) will differ slightly.

What is the difference between outer diameter and wall thickness?

Outer diameter (OD) is the total outside measurement of the tube. Wall thickness is how thick the tube wall is. Inner diameter (ID) equals OD minus twice the wall thickness. The calculator shows an error if the wall is too thick for the given OD.

Which units are supported?

Diameter and wall thickness accept mm, cm, or inches. Length accepts mm, cm, m, inches, or feet. All values are converted to meters before the calculation runs.

Why does my OD need to be greater than 2 × wall thickness?

If the wall thickness is equal to or greater than OD/2, the inner diameter would be zero or negative, which is physically impossible for a hollow tube. The calculator validates this and shows an error.

Aluminum Round Tube Weight Calculator

Enter outer diameter, wall thickness, and length to get the weight of an aluminum round tube in kg and lb instantly.

Tube Dimensions

Outer Diameter (OD)

Wall Thickness

Length

Formula Reference

W = (π / 4) × (OD² − ID²) × L × ρ

Where OD = outer diameter (m), ID = OD − 2 × wall (m), L = length (m), ρ = 2700 kg/m³ (aluminum density), W = weight (kg).

Enter tube dimensions on the left and click Calculate.

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Summary

This calculator computes the weight of an aluminum round (hollow) tube using the cross-sectional area formula: Weight = (π ÷ 4) × (OD² − ID²) × Length × Density. The inner diameter is derived from OD − 2 × wall thickness. Aluminum density is taken as 2700 kg/m³ (standard for alloys such as 6061 and 6063). Inputs are accepted in millimeters, centimeters, meters, inches, or feet and results are shown in both kilograms and pounds.

How it works

Enter the outer diameter (OD) of the tube and choose a unit (mm, cm, in).
Enter the wall thickness and choose a unit (mm, cm, in).
Enter the tube length and choose a unit (mm, cm, m, in, ft).
Click Calculate — the inner diameter is derived automatically as ID = OD − 2 × wall.
Weight is displayed in kilograms and pounds using the standard aluminum density of 2700 kg/m³.

Use cases

Estimating material weight for aluminum tube framing and structural projects.
Calculating shipping and freight weight for round aluminum tube orders.
Preparing a bill of materials for fabrication or purchasing.
Comparing wall thicknesses to balance strength and weight.
Verifying load and handling requirements before installation.
Quick field estimation of tube weight without manual calculation.

Frequently Asked Questions

Last updated: 2026-10-07 · Reviewed by Nham Vu