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`A = 1/4 * sqrt( 5*(5 + 2* sqrt(5)))* ( "s" )^2`

Enter a value for all fields

This **Area of a Pentagon** calculator computes the area of a regular pentagon, a polygon with 5 equal sides of length (**s**).

**INSTRUCTIONS:** Choose units and enter the following:

- (
**s**) Length of Sides of pentagon

**AREA (A):** The area is returned in square meters. However, this can be automatically converted to compatible units (e.g., square feet, acres) via the pull-down menu.

For the Volume of a Pentagon shaped column, CLICK HERE.

A regular pentagon has five equal sides and equal angles. The formula for the area of a regular pentagon is as follows:

`A = 1/4 * sqrt( 5*(5 + 2* sqrt(5)))* s^2`

where:

- A = Area of the Pentagon
- s = Length of the sides

- Area of Triangle - Three Sides
- Area of Quadrilateral - Four Sides
- Area of Pentagon - Five Sides
- Area of Hexagon - Six Sides
- Area of Heptagon - Seven Sides
- Area of Octagon - Eight Sides
- Area of Nonagon - Nine Sides
- Area of Decagon - Ten Sides
- Area of Hendecagon - Eleven Sides
- Area of Dodecagon - Twelve Sides
- Area of Polygon - Any number of sides (n).