Ring Area calculator.
Find the area between two concentric circular boundaries.
Your inputs
Use measurements from your plan and properties from your chosen product. Any prefilled values are illustrative.
A clear estimate starts here.
Enter your dimensions and product details to see the quantity and purchase breakdown.
Formula and assumptions
How this calculation works.
The diameters describe concentric circles. An offset inner boundary requires a different geometric model.
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Outer diameter
- 4 m
- Inner diameter
- 2 m
Ring area: 9.42 m²
Before you purchase
Use dimensions from your plan and properties from your chosen product. Any design spacing, section or fixing pattern must already be specified.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-04. Calculation and review policy.