When to use this calculator
Estimate metal washer or ring mass from annular geometry. Uniform flat annular ring without chamfers or holes beyond the central opening.
Explore the material stock & weight calculators for other questions in this topic. For a related calculation, use the Rectangular Tube Weight Calculator: Estimate material mass of a rectangular hollow tube.
PUTTING IT INTO PRACTICE
Metal Ring 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) | 100 |
| Inside diameter (mm) | 50 |
| Axial thickness (mm) | 10 |
| Density (kg/m³) | 7,850 |
| Result | 0.462403 kg |
- Check the input labels and enter the example values above.
- Apply the relationship: Mass = π(D²−d²)/4 × thickness × density with millimetres converted.
- The result is 0.462403 kg, rounded for display.
How to interpret your result
Uniform flat annular ring without chamfers or holes beyond the central opening.
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 metal ring weight calculator useful?
Estimate metal washer or ring mass from annular geometry. Uniform flat annular ring without chamfers or holes beyond the central opening.
How do I use the metal ring weight calculator?
Enter outside diameter (mm), inside diameter (mm), axial thickness (mm), 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(D²−d²)/4 × thickness × density with millimetres converted.
What should I check before using the result?
Uniform flat annular ring without chamfers or holes beyond the central opening.
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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