Hemispherical Bowl Casting Shell Material calculator.
Measure a supplied hollow hemispherical shell by subtracting the inner hemisphere, retaining its closed lower shell.
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 = 2π(outer radius³ − inner radius³)/3; both hemispheres share the same top centre plane. Does not determine minimum thickness, material suitability, food contact, strength or curing.
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 hemisphere radius
- 0.2 m
- Inner hemisphere radius
- 0.15 m
- Identical shells
- 1
Selected mixed-material packages: 1 packages
Ideal centred hemispheres only. A rim, flat foot and non-hemispherical lip are excluded. 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 determine minimum thickness, material suitability, food contact, strength or curing.
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
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