Perimeter of a Polygon Calculator

Your details

Whole number of sides. Minimum 3 (triangle). Up to 1,000 sides.
Choose which dimension you already know. The calculator derives all others.
Enter the numeric value of the dimension you selected above.
Perimeter
60cm

Total boundary length of the polygon

Area259.8076cm²
Side length (a)10cm
Inradius / apothem (r)8.6603cm
Circumradius (R)10cm
Interior angle120deg
Exterior angle60deg
Polygon nameHexagon

Perimeter of the hexagon: 60.0000 cm

  • The hexagon has 6 equal sides of 10.0000 cm each, giving a perimeter of 60.0000 cm.
  • Its area is 259.8076 cm^2. As n increases, the area-to-perimeter ratio grows: a circle encloses the most area for a given perimeter.
  • Each interior angle is 120.00 degrees. All interior angles of a regular polygon are equal; their sum is (n - 2) x 180 = 720 degrees.
  • All calculations above assume a regular polygon (all sides and angles equal). For irregular polygons, add all individual side lengths to find the perimeter.

Next stepTo find the perimeter of an irregular polygon, measure each side individually and sum them. This calculator handles the regular case automatically.

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