What formula is used to calculate brass tube weight?

Weight = (π ÷ 4) × (OD² − ID²) × Length × Density. OD is the outer diameter, ID is the inner diameter (OD − 2 × wall thickness), all converted to meters. Multiplying the hollow volume (m³) by the brass alloy density (kg/m³) gives weight in kilograms.

What is the density of brass used in the calculation?

Density varies by alloy. Common values: C260 Cartridge Brass = 8530 kg/m³, C272 Yellow Brass = 8470 kg/m³, C360 Free-Machining Brass = 8500 kg/m³, C464 Naval Brass = 8410 kg/m³. This calculator uses the precise density for each selected alloy.

What is the difference between outer diameter and wall thickness?

Outer diameter (OD) is the total outside dimension of the tube. Wall thickness is how thick the tube wall is. The inner diameter (ID) equals OD minus 2 × wall thickness. The calculator warns you if the wall thickness is too large for the given OD.

What units are supported?

Diameter and wall thickness can be entered in mm, cm, or inches. Length can be entered in meters, mm, feet, or inches. All values are converted internally to meters before calculation.

Can I calculate weight for multiple tubes at once?

Yes. Enter the number of tubes in the Quantity field. The calculator shows both the per-tube weight and the total weight for the entire batch.

Does this work for square or rectangular brass tubes?

No — this calculator is for round hollow tubes only. Square and rectangular hollow sections require a different cross-sectional area formula based on outer width, height, and wall thickness.

Brass Tube Weight Calculator

Name: Brass Tube Weight Calculator
Availability: InStock
Author: Nham Vu

Enter outer diameter, wall thickness, and length to instantly calculate brass tube weight in kg and lbs for common brass alloys.

Tube Dimensions

Outer Diameter (OD)

Wall Thickness

Length

Brass Alloy

Quantity (tubes)

Formula Reference

W = (π / 4) × (OD² − ID²) × L × ρ

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

Enter tube dimensions on the left and click Calculate.

Brass Alloy Densities

Alloy	Grade / Use	kg/m³	lb/in³
C260	Cartridge Brass — General Use	8530	0.308
C272	Yellow Brass — Decorative	8470	0.306
C360	Free-Machining Brass — Precision	8500	0.307
C464	Naval Brass — Marine Grade	8410	0.304
C510	Phosphor Bronze — Spring / Bearing	8860	0.320

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Summary

Enter outer diameter, wall thickness, and length to instantly calculate brass tube weight in kg and lbs for common brass alloys.

How it works

Enter the tube outer diameter (OD) and select the unit (mm, cm, or in).
Enter the wall thickness and select the unit (mm, cm, or in).
Enter the tube length and select the unit (m, mm, ft, or in).
Choose the brass alloy grade from the dropdown.
Optionally enter a quantity for multiple tubes.
Click Calculate to get the total weight in kg and lbs.

Use cases

Estimating brass tube weight for plumbing, HVAC, and heat exchanger projects.
Calculating shipping and freight weight for brass tube orders.
Comparing alloy grades and wall thicknesses to optimize component weight.
Preparing a bill of materials (BOM) for fabrication or purchasing.
Verifying load-bearing and handling requirements for brass tubing assemblies.
Cost estimation for brass tube purchases priced by weight.
Material planning for musical instruments, decorative hardware, and precision parts.
Quick field check of brass tube weight before lifting or installation.

Frequently Asked Questions

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