Geometry

Regular Polygon Area Calculator

Area of a regular polygon from sides and side length.

Free to use — no sign-up or login.

Regular polygon area figure A regular polygon divided into center triangles with one side and the apothem marked.

Enter valid values to draw the figure.

n = sides · s = side length · ap = apothem · A = area

Center triangles partition the polygon; side s and apothem ap (perpendicular to a side) are marked.

Area

This free Regular Polygon Area Calculator covers Area of a regular polygon from sides and side length.

Regular n-gon area from side length s; ap is the apothem. Related geometry tools sit beside How it works, with no account required.

Using the Regular Polygon Area Calculator

Area of a regular polygon from sides and side length. Typical inputs are Number of sides (n) and Side length (s). How it works beside the form states the identity the Regular Polygon Area Calculator applies.

FAQ

How do I use the Regular Polygon Area Calculator?

Open the Regular Polygon Area Calculator, fill Number of sides (n) and Side length (s), and read the result. Area uses side length and apothem ap = s / (2 tan(π/n)).

What formula does the Regular Polygon Area Calculator use?

The Regular Polygon Area Calculator uses the identity in How it works. In words: Area uses side length and apothem ap = s / (2 tan(π/n)).