Cone and Frustum Sheet Development calculator.
Find the flat sector needed for an ideal cone or tapered round sleeve.
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.
Reports the developed annular-sector radii and angle in addition to area. It differs from volume takeoff and from a rectangular approximation to a curved sheet.
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Larger end radius
- 3 m
- Smaller end radius; zero for cone
- 0 m
- Axial height
- 4 m
Developed curved sheet area: 47.12 m²
Ideal thin-sheet development excludes seams, bend allowance, material stretch and end caps. Those must be specified separately.
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.
Reports the developed annular-sector radii and angle in addition to area. It differs from volume takeoff and from a rectangular approximation to a curved sheet.
Dimensions, quantities, prices, timing and product properties are supplied by you. This tool does not select construction specifications or assess structural, electrical or hydraulic suitability.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-04. Calculation and review policy.