Stainless steel ring weight calculator in kg.
Ring weight (kg) = π × (outside diameter² − inside diameter²) × thickness × density ÷ 4,000,000. Use mm and g/cm³. A 200 OD × 100 ID × 10 mm SS 304 ring at 7.93 g/cm³ weighs about 1.868 kg.
Material detailsDensity: 7.85 g/cm³
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Theoretical weight from nominal size and density. Actual weight varies within mill tolerances.
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Stainless steel ring weight chart
Finished geometry estimates in kilograms per piece. All dimensions below are millimetres. Density assumptions: SS 304 7.93, SS 316 7.98 and SS 202 7.80 g/cm³.
| Outside diameter, mm | Inside diameter, mm | Thickness, mm | SS 304, kg | SS 316, kg | SS 202, kg |
|---|---|---|---|---|---|
| 100 | 50 | 10 | 0.467 | 0.470 | 0.459 |
| 150 | 75 | 10 | 1.051 | 1.058 | 1.034 |
| 200 | 100 | 10 | 1.868 | 1.880 | 1.838 |
| 250 | 125 | 10 | 2.919 | 2.938 | 2.872 |
| 300 | 150 | 10 | 4.204 | 4.231 | 4.135 |
| 400 | 200 | 10 | 7.474 | 7.521 | 7.351 |
| 500 | 250 | 10 | 11.678 | 11.752 | 11.486 |
From a weight estimate to a material enquiry
Quote the exact grade, outside diameter, inside diameter, thickness, quantity, tolerance and finish. Include the drawing revision when machining or cutting is required. The weight excludes scrap, cutting allowance and packing.
View SS rings supply requirements · Bulk supply enquiries across India
Reference basis: Compiled by Steel Impex India. Check each table’s source, product form and delivery condition before use. Sources, calculation methods and corrections.
Frequently asked questions
What dimensions do I need for ring weight?
Use outside diameter, inside diameter and axial thickness, all in the same units, plus the material density. The inside diameter must be smaller than the outside diameter.
Can this calculate the weight of a finished flange?
It estimates a plain annular ring only. A flange hub, bolt holes, facing and other features change the weight. Use the flange drawing or manufacturer weight for the finished component.
What happens when the inside diameter is zero?
The ring becomes a solid disc. Zero inside diameter is allowed; the result matches the solid circle calculation.
Is a ring cut from plate equivalent to a forged ring?
Do not assume equivalence. Manufacturing route, material flow, condition and inspection requirements can matter to the drawing and service. Ask for the specified route and obtain approval for any alternative.
Can I share a calculation for several pieces?
Yes. Use Copy calculation link after checking dimensions, density and a whole-number quantity. The link preserves those inputs but excludes your price. Calculated mass is an estimate; confirm commercial weight and packing separately.