Concrete Ring Volume calculator.
Measure circular concrete annuli such as collars from specified internal and external diameters.
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 opening is a geometric deduction. Ring dimensions are user supplied and are not structural recommendations.
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Outside diameter
- 2 m
- Opening diameter
- 1 m
- Ring height
- 200 mm
- Identical rings
- 2
- Volume allowance
- 0 %
Concrete order volume: 0.94 m³
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.
The opening is a geometric deduction. Ring dimensions are user supplied and are not structural recommendations.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-04. Calculation and review policy.