Regular Polygon Area calculator.
Measure a regular polygon from its side count and circumradius.
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.
All sides and central angles must be equal. An irregular measured outline belongs in the ordered-coordinate polygon tool. Also returns the interior corner angle, its bisector and the central angle. These are mathematical polygon angles.
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Number of equal sides
- 4
- Centre-to-vertex radius
- 1.41 m
Regular polygon area: 4 m²
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.
All sides and central angles must be equal. An irregular measured outline belongs in the ordered-coordinate polygon tool.
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.