๐ทPolygon Angle Calculator
Find interior and exterior angles from sides, or sides from a known angle.
Free Polygon Angle Calculator
Find the interior and exterior angles of any regular polygon with our free polygon angle calculator. Enter the number of sides and instantly get the sum of interior angles, each individual interior angle, and each exterior angle โ with the formula shown and a diagram of the shape.
Working the other way? Enter a known interior or exterior angle and the calculator solves for the number of sides, flagging clearly if the angle doesn't correspond to any whole-sided regular polygon rather than showing a fractional, meaningless answer.
Common polygons are named automatically โ triangle, pentagon, hexagon, and beyond. No sign-up, no downloads โ just enter a value and calculate.