Regular Polygon Calculator
Math ToolsArea, perimeter, apothem and angles of a regular polygon
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History
All history →Regular Polygon Calculator — at a glance
Get every measurement of a regular polygon.
6 sides
5 cm
Calculate
Area
Perimeter
How to use it — step by step
Number of sides and the length of one side.
1
Enter your values
Fill in the fields. Default numbers are shown so you can see how it works.
2
Press Calculate
The answer appears at once as large result cards.
3
Copy or share
Copy the result, or share a link that opens with your numbers filled in.
Pro tips
Small things that make the result better.
✦A hexagon has 6 sides and 120° interior angles.
✦All sides and angles are equal in a regular polygon.
✦Use any length unit; area is in its square.
Quick facts
Freeno signup
Privateruns in your browser
Instantresult in a second
No limituse it as often as you like
Frequently Asked Questions
What is the apothem?+
The distance from the center to the middle of a side.
How many diagonals?+
n × (n − 3) ÷ 2.
Is my data safe?+
Yes. Everything runs inside your own browser. Your text, files and images are never uploaded to any server.
Is this tool really free?+
Yes — completely free, no signup, no watermark and no usage limit.
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