Tapered Round Pot Casting Shell Material calculator.
Subtract a supplied tapered inner cavity from the outer pot, checking that the cavity fits at the supplied base height.
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.
Shell volume = outer circular frustum volume − inner circular frustum volume; the inner cavity starts at the supplied base height. Does not choose shell thickness, material, reinforcement, load capacity or planter suitability.
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Selected mixed volume yield per kit or bag
- 10 L/bag
- Outer bottom diameter
- 0.4 m
- Outer top diameter
- 0.4 m
- Outer height
- 0.3 m
- Inner diameter at cavity base
- 0.3 m
- Inner diameter at cavity top
- 0.3 m
- Supplied base height
- 0.05 m
- Identical castings
- 1
Selected mixed-material packages: 3 packages
Straight-sided centred circular frusta with the same top plane. Endpoint checks retain containment throughout the linear taper. Product suitability, curing, strength and mixing specifications are not selected.
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.
Does not choose shell thickness, material, reinforcement, load capacity or planter suitability.
All dimensions, properties and application patterns are user-supplied. No building-code default is inserted.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-06. Calculation and review policy.
Check your purchase assumptions
Connected work guides and comparisons
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