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Circumferential length, area online calculator

App description

The formula for the circle:

The formula for the area of the circle is: \(S=πr2\) or \(S=π(d/2)2\)

  • π means pi
  • r indicates the radius
  • d indicates the diameter

The circumference is: \(C = πd\) or \(C=2πr\)

  • d is the diameter of the circle
  • r is the radius of the circle

Usage example

Input data:

Input: 2

This number is: radius

Well, this circle:

Diameter: 4

Perimeter: 12.566

Area: 12.566


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