When to use this calculator
Estimate weight of a circular hollow tube from outside diameter and wall thickness. Uses a uniform wall with no end caps, weld allowance or corrosion loss.
Explore the material stock & weight calculators for other questions in this topic. For a related calculation, use the Sheet Material Cost Calculator: Estimate raw material cost from sheet geometry and a mass-based price.
PUTTING IT INTO PRACTICE
Round Tube Weight: a worked example
The values below are an illustrative example, not a recommendation. Replace them with measurements or assumptions that match your question.
| Input | Example value |
|---|---|
| Outside diameter (mm) | 50 |
| Wall thickness (mm) | 5 |
| Length (m) | 2 |
| Density (kg/m³) | 7,850 |
| Result | 11.097676 kg |
- Check the input labels and enter the example values above.
- Apply the relationship: Mass = π(outside diameter²−inside diameter²)/4 × length × density.
- The result is 11.097676 kg, rounded for display.
How to interpret your result
Uses a uniform wall with no end caps, weld allowance or corrosion loss.
Use actual dimensions and a density matching the material and condition. Rolled sections, corners and manufacturing tolerance can differ from sharp ideal geometry. Weight estimates do not establish structural capacity.
Frequently asked questions
Should nominal or actual material dimensions be used?
Use actual dimensions for a geometric mass estimate. Nominal product labels and finished dimensions can differ.
When is the round tube weight calculator useful?
Estimate weight of a circular hollow tube from outside diameter and wall thickness. Uses a uniform wall with no end caps, weld allowance or corrosion loss.
How do I use the round tube weight calculator?
Enter outside diameter (mm), wall thickness (mm), length (m), density (kg/m³). The result updates automatically. Use the units shown beside each input; the example values illustrate the method.
Which formula does this calculator use?
Mass = π(outside diameter²−inside diameter²)/4 × length × density.
What should I check before using the result?
Uses a uniform wall with no end caps, weld allowance or corrosion loss.
How are results rounded?
Scalar numbers display up to six decimal places, with scientific notation for very large or small values. Text, fraction, date and schedule outputs use the format described on the tool. Intermediate calculations use JavaScript floating-point arithmetic. Keep sensible precision for your measurements.
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