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 8730 kg/m³ (bronze). The inner side equals the outer side minus twice the wall thickness.

What bronze density does this calculator use?

A density of 8730 kg/m³ is used, representing common copper-tin bronze alloys such as C932 bearing bronze and similar grades. Specialty bronzes (e.g., aluminum bronze at ~7600 kg/m³, or silicon bronze at ~8530 kg/m³) will differ slightly.

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 = Outer Side − 2 × Wall Thickness. The calculator validates that the inner dimension is positive.

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 calculation.

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

If the wall thickness is equal to or greater than half the outer side, the inner dimension would be zero or negative — physically impossible for a hollow tube. The calculator shows an error in this case.

How does bronze compare to aluminum or steel in weight?

Bronze (≈8730 kg/m³) is roughly 3.2× heavier than aluminum (≈2700 kg/m³) and slightly lighter than carbon steel (≈7850 kg/m³ for most grades, though steel can vary widely). Bronze square tubes are noticeably heavier than aluminum ones of the same dimensions.

Bronze Square Tube Weight Calculator

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

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

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 = 8730 kg/m³ (bronze 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 instantly get the weight of a bronze square tube in kg and lb.

How it works

Enter the outer side size of the square tube and select a unit (mm, cm, or in).
Enter the wall thickness and select a unit (mm, cm, or in).
Enter the tube length and select a unit (mm, cm, m, in, or ft).
Click Calculate — the inner side is computed automatically as Inner = Side − 2 × Wall.
Weight is displayed in kilograms and pounds using the standard bronze density of 8730 kg/m³.

Use cases

Estimating material weight for bronze square tube structural or decorative projects.
Calculating shipping and freight weight for bronze square tube orders.
Preparing a bill of materials for machining or fabrication.
Comparing different wall thicknesses to balance strength and weight.
Verifying load and handling requirements for bronze tube assemblies.
Quick field estimation of bronze square tube weight without manual calculation.
Checking cost estimates based on weight for bronze material purchasing.

Frequently Asked Questions

Last updated: 2026-06-22 · Reviewed by Nham Vu