What you provide
What you provide
- Number of sides: Whole-number side count from 3 through 1,000.
- Equal side length: Length shared by every polygon edge.
GEOMETRY / EQUAL SIDES
Regular Polygon Calculator
Calculate area, perimeter, apothem, and interior angle for a regular polygon with 3 to 1,000 equal sides.
- 01 Calculated in this tab
- 02 Values stay in this browser tab
- 03 Use boundary
Use boundary
Calculation path
Equal central sectors derive the apothem; one half of perimeter times apothem gives the total polygon area.
Calculation path
Apothem = side / (2 tan(pi/n)); area = perimeter x apothem / 2.
What you receive
What you receive
- Regular polygon area
- Perimeter and apothem
- Interior angle for each vertex
Use boundary
Choose the maximum decimal places shown. This does not increase source accuracy.
All sides and angles are assumed equal; irregular polygons require coordinate or triangulation methods.
This is an educational planning result, not a structural, electrical, thermal, solar, battery, generator, or safety design. Confirm specifications, units, codes, and professional requirements before acting.