About this tool: Regular Polygon Calculator
Calculate area, perimeter, inradius and circumradius of a regular polygon.
All sides and interior angles of a regular polygon are equal. Enter its side count and one side length to obtain perimeter, area and both circle radii. The apothem is the distance from the center to a side; it is also the inradius.
How the calculation works
Worked example
| Number of sides | 6 |
| Side length | 2 |
P = 12; S ≈ 10.3923048454
Questions and answers
What does this tool do?
Calculate area, perimeter, inradius and circumradius of a regular polygon. All sides and interior angles of a regular polygon are equal. Enter its side count and one side length to obtain perimeter, area and both circle radii. The apothem is the distance from the center to a side; it is also the inradius.
What affects precision and input format?
Floating-point results are rounded for display. Keep the units shown in the input labels; decimal points and decimal commas are accepted.
Where are the calculations performed?
The calculation runs in your browser. You can use the tool without installing software.
Asted Cloud
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