What formula is used?

Cross-sectional area = Side² − (Side − 2 × Wall)². Weight = Area × Length × Density, where all dimensions are in meters and density is 8960 kg/m³ (copper). The inner side equals the outer side minus twice the wall thickness.

What copper density does this calculator use?

A density of 8960 kg/m³ is used, which is the standard value for commercially pure copper such as C110 (electrolytic tough pitch copper). Copper alloys such as brass or bronze have different densities and will produce different results.

What is the difference between outer side size and wall thickness?

Outer side size is the external dimension of one face of the square tube. Wall thickness is how thick the tube wall is. The inner side equals the outer side minus twice the wall thickness. The calculator shows an error if the wall is too thick relative to the side size.

Which units are supported?

Outer side size 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 must the outer side size be greater than 2 × wall thickness?

If the wall thickness equals or exceeds half the outer side size, the inner dimension would be zero or negative, which is physically impossible for a hollow tube. The calculator validates this and shows an error.

How much heavier is copper compared to aluminum for the same tube dimensions?

Copper (8960 kg/m³) is approximately 3.3 times denser than aluminum (2700 kg/m³), so a copper square tube of identical dimensions will weigh roughly 3.3 times more than its aluminum equivalent.

Copper Square Tube Weight Calculator

Name: Copper Square Tube Weight Calculator
Availability: InStock
Author: Nham Vu

Enter outer side size, wall thickness, and length to get the weight of a copper square tube in kg and lb instantly.

Tube Dimensions

Outer Side Size

Wall Thickness

Length

Formula Reference

W = (S² − (S − 2t)²) × L × ρ

Where S = outer side size (m), t = wall thickness (m), L = length (m), ρ = 8960 kg/m³ (copper density), W = weight (kg).

Enter tube dimensions on the left and click Calculate.

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Summary

Enter outer side size, wall thickness, and length to get the weight of a copper square tube in kg and lb instantly.

How it works

Enter the outer side size of the square 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 side is derived automatically as Inner = Side − 2 × Wall.
Weight is displayed in kilograms and pounds using the standard copper density of 8960 kg/m³.

Use cases

Estimating material weight for copper square tube plumbing and HVAC systems.
Calculating shipping and freight weight for copper tube orders.
Preparing a bill of materials for fabrication or purchasing.
Comparing wall thicknesses to balance structural strength and weight.
Verifying load-bearing requirements before installation.
Quick field estimation of copper tube weight without manual calculation.
Cost estimation based on weight for copper procurement.

Frequently Asked Questions

Last updated: 2026-07-16 · Reviewed by Nham Vu