What formula is used?

Weight = (π ÷ 4) × (OD² − ID²) × Length × Density. The term (OD² − ID²) represents the annular area of the hollow cross-section. All dimensions are converted to meters before the calculation, and density in kg/m³ gives the result in kilograms.

What wood densities are used for the preset species?

The presets use average air-dried densities: Pine 550 kg/m³, Spruce 450 kg/m³, Cedar 370 kg/m³, Fir 530 kg/m³, Oak 750 kg/m³, Maple 705 kg/m³, Walnut 640 kg/m³, Cherry 590 kg/m³, Teak 690 kg/m³, Mahogany 545 kg/m³, Bamboo 700 kg/m³. Actual density varies with moisture content and species variety.

When should I use a custom density?

Use custom density when you know the actual measured density of your specific wood sample, or when working with an uncommon species not in the preset list. Dried lumber is typically 300–900 kg/m³; green (unseasoned) wood can be significantly heavier.

What is the difference between OD and ID?

Outer diameter (OD) is the total outside measurement of the tube. Inner diameter (ID) is the diameter of the hollow bore. The wall thickness equals (OD − ID) ÷ 2. The calculator validates that ID is strictly less than OD.

Which units are supported?

Diameter inputs 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 moisture content matter?

Wood density increases significantly with moisture content. The preset values assume air-dried lumber (around 12–15% moisture content). Freshly cut (green) wood can weigh 50–100% more than the preset values.

Wood Round Tube Weight Calculator

Name: Wood Round Tube Weight Calculator
Availability: InStock
Author: Nham Vu

Enter outer diameter, inner diameter, length, and wood species (or custom density) to get the weight of a hollow wooden round tube instantly.

Tube Dimensions

Outer Diameter (OD)

Inner Diameter (ID)

Length

Wood Species

Formula Reference

W = (π / 4) × (OD² − ID²) × L × ρ

Where OD = outer diameter (m), ID = inner diameter (m), L = length (m), ρ = wood density (kg/m³), W = weight (kg).

Enter tube dimensions on the left and click Calculate.

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Summary

Enter outer diameter, inner diameter, length, and wood species (or custom density) to get the weight of a hollow wooden round tube instantly.

How it works

Enter the outer diameter (OD) of the wooden tube and choose a unit (mm, cm, in).
Enter the inner diameter (ID) of the hollow bore and choose a unit (mm, cm, in).
Enter the tube length and choose a unit (mm, cm, m, in, ft).
Select a wood species from the preset list or choose "Custom" and enter a density in kg/m³.
Click Calculate — weight is displayed in kilograms and pounds along with volume and density details.

Use cases

Estimating the weight of turned wooden cylinders and lathe-bored tubes.
Calculating material weight for wooden pipe columns in furniture or architecture.
Preparing shipping and freight estimates for hollow wooden tube orders.
Comparing wood species weights when selecting material for a structural design.
Verifying load-bearing requirements for wooden tube assemblies.
Bill-of-materials weight calculations for woodworking projects.
Quick field estimation without manual cross-section math.

Frequently Asked Questions

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