Pentagon Area Calculator

Find the area of a regular pentagon from its side length.
Result
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How it works

Area = ¼ √(5(5 + 2√5)) × s²

Frequently Asked Questions

What is the formula?
Area = ¼ √(5(5 + 2√5)) × s²
What units should I use?
Use any single unit for all inputs. The area result is in that unit squared, and volume is in that unit cubed.