Circle Properties Calculator

Calculate the exact diameter, circumference, and area of a circle using its radius.

Area78.54
Circumference31.42
Diameter10

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Understanding Circle Properties

A circle is a 2D shape where all points on the edge are equidistant from the center. This calculator quickly finds all its basic properties.

Formulas

  • Diameter: 2 × Radius
  • Circumference: 2 × π × Radius
  • Area: π × Radius²

Frequently Asked Questions

What is pi (π)?

Pi is a mathematical constant representing the ratio of a circle's circumference to its diameter, approximately equal to 3.14159.