Regular Polygon Inset Frame Coating calculator.
Measure a uniformly inset face border of a supplied regular polygon using its apothem and existing border width.
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.
Frame face area = side count × tan(π/side count) × (outer apothem² − inner apothem²); inner apothem = outer apothem − supplied inset. Does not choose frame thickness, strength, joinery or finish specifications.
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Supplied coat count
- 1
- Chosen product coverage
- 1 m²/L
- Selected container volume
- 1 L
- Supplied polygon side count
- 4
- Measured outer apothem
- 0.5 m
- Supplied uniform face inset
- 0.1 m
- Identical frames
- 1
Selected coating containers: 1 containers
Regular polygon with parallel inset edges. An irregular polygon requires an actual boundary measurement instead. Coating suitability and coat count 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 frame thickness, strength, joinery or finish specifications.
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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