When to use this calculator
Estimate mass of a solid circular bar. Uses a uniform solid round section and entered material density.
Explore the material stock & weight calculators for other questions in this topic. For a related calculation, use the Round Tube Weight Calculator: Estimate weight of a circular hollow tube from outside diameter and wall thickness.
PUTTING IT INTO PRACTICE
Round Bar 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 |
|---|---|
| Diameter (mm) | 20 |
| Length (m) | 2 |
| Density (kg/m³) | 7,850 |
| Result | 4.9323 kg |
- Check the input labels and enter the example values above.
- Apply the relationship: Mass = π(diameter/2000)² × length × density.
- The result is 4.9323 kg, rounded for display.
How to interpret your result
Uses a uniform solid round section and entered material density.
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 bar weight calculator useful?
Estimate mass of a solid circular bar. Uses a uniform solid round section and entered material density.
How do I use the round bar weight calculator?
Enter diameter (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(diameter/2000)² × length × density.
What should I check before using the result?
Uses a uniform solid round section and entered material density.
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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