What formula is used?

Weight = (π ÷ 4) × (OD² − ID²) × Length × Density, where OD and ID are the outer and inner diameters in meters, Length is in meters, and Density is in kg/m³. The result is weight in kilograms.

How does this differ from a wall-thickness calculator?

This tool uses the actual inner diameter instead of wall thickness. Inner diameter equals OD minus twice the wall thickness, so both approaches give the same result. Using ID directly is common for purchased tubes where the bore size is specified.

What plastic densities are used for the presets?

PVC: 1380 kg/m³, HDPE: 955 kg/m³, LDPE: 925 kg/m³, Polypropylene: 910 kg/m³, ABS: 1050 kg/m³, Nylon (PA6): 1140 kg/m³, Polycarbonate: 1200 kg/m³, Acrylic (PMMA): 1180 kg/m³, PTFE: 2200 kg/m³. These are typical mid-range values; actual density may vary by grade.

Can I enter a custom density?

Yes. Select "Custom" from the material list and enter any density value in kg/m³. This lets you calculate weight for any plastic, composite, or rubber tube.

Which units are supported?

Diameter inputs (OD and ID) accept mm, cm, or inches. Length accepts mm, cm, m, inches, or feet. All values are converted to meters internally before the calculation runs.

Why must the inner diameter be less than the outer diameter?

If the inner diameter equals or exceeds the outer diameter, the wall thickness is zero or negative, which is physically impossible. The calculator validates this and shows a friendly error.

Plastic Round Tube Weight Calculator

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

Enter outer diameter, inner diameter, length, and plastic type to get the weight of a plastic round tube in kg and lb instantly.

Tube Dimensions

Outer Diameter (OD)

Inner Diameter (ID)

Length

Plastic Material

Formula Reference

W = (π / 4) × (OD² − ID²) × L × ρ

Where OD = outer diameter (m), ID = inner diameter (m), L = length (m), ρ = plastic 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 plastic type to get the weight of a plastic round tube in kg and lb instantly.

How it works

Enter the outer diameter (OD) of the tube and choose a unit (mm, cm, in).
Enter the inner diameter (ID) of the tube and choose a unit (mm, cm, in).
Enter the tube length and choose a unit (mm, cm, m, in, ft).
Select a plastic material preset or enter a custom density in kg/m³.
Click Calculate — weight is shown in kilograms and pounds along with a full breakdown.

Use cases

Estimating material weight for PVC, HDPE, or ABS pipe and tube projects.
Calculating shipping and freight weight for plastic tube orders.
Comparing different plastic materials by weight for design optimization.
Preparing a bill of materials for manufacturing or purchasing.
Verifying load and handling requirements before installation.
Checking structural weight budgets for plastic tube assemblies.
Quickly estimating tube weight during field work without manual calculation.

Frequently Asked Questions

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