Square Foot Calculator 5 Sides
Calculate the square footage of a regular 5-sided polygon (pentagon). Enter the side length to get the area in square feet.
5-Sided Polygon Calculator
Enter the side length of a regular 5-sided polygon (pentagon).
Regular pentagon with 5 equal sides.
Each interior angle = 108°.
How to Calculate Square Footage of a 5-Sided Shape
A regular 5-sided polygon (pentagon) has all sides equal and all interior angles equal (108° each). This calculator uses the standard regular polygon area formula.
5-Sided Polygon Formula
This is equivalent to the regular pentagon formula. For irregular 5-sided shapes, use the irregular shape calculator.
Example Calculation
A regular pentagon garden bed has sides of 7 feet each.
1.72048 × 7² = 1.72048 × 49 = 84.30 square feet (7.83 sq m)
Frequently Asked Questions
How do I calculate the area of a 5-sided polygon? +
For a regular pentagon (all sides equal), use Area ≈ 1.72048 × s². For irregular 5-sided shapes, use the coordinate/Shoelace method.
What is a regular vs irregular polygon? +
A regular polygon has all sides equal and all angles equal. An irregular polygon has sides and/or angles of different sizes.
What is each interior angle of a regular pentagon? +
Each interior angle of a regular pentagon is 108°. The sum of all interior angles is 540°.