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 11,340 kg/m³ (pure lead). The inner side equals the outer side minus twice the wall thickness.

What lead density does this calculator use?

A density of 11,340 kg/m³ is used, which is the standard value for pure lead (Pb). Lead alloys such as lead-antimony or lead-tin will have slightly different densities, but 11,340 kg/m³ is the correct value for most structural and shielding applications.

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 for the given 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 is equal to or greater than 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.

Why is lead so much heavier than other metals?

Lead has a density of 11,340 kg/m³, which is roughly 4.2 times denser than aluminum (2,700 kg/m³) and about 1.4 times denser than steel (7,850 kg/m³). This high density makes lead ideal for radiation shielding, vibration damping, and counterweights.

Lead Square Tube Weight Calculator

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

Enter outer side size, wall thickness, and length to get the weight of a lead 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 = 11,340 kg/m³ (lead 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 lead 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, or in).
Enter the wall thickness and choose a unit (mm, cm, or in).
Enter the tube length and choose a unit (mm, cm, m, in, or ft).
Click Calculate — the inner side is derived automatically as Inner = Side − 2 × Wall.
Weight is displayed in kilograms and pounds using the standard lead density of 11,340 kg/m³.

Use cases

Estimating lead tube weight for radiation shielding enclosures and medical imaging equipment.
Calculating counterweight and ballast mass for marine, aerospace, and industrial applications.
Preparing a bill of materials for lead fabrication or purchasing orders.
Comparing wall thicknesses to achieve a specific target weight for a counterbalance.
Verifying handling and structural load requirements before installation of heavy lead components.
Quick field estimation of lead square tube weight without manual calculation.
Checking freight and shipping weight for lead tube orders.
Determining lead volume for cost estimation at a given price per kilogram.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu