Circle Area Calculator

Calculate area, circumference, diameter, and other properties of a circle.

How to Use This Calculator

  1. Enter your Shape.
  2. Enter your Radius.
  3. Click Calculate to see instant results with a step-by-step breakdown.
  4. Use the Share button to copy a link with your inputs pre-filled.

⚠️ Results are for informational purposes only. Always verify important calculations with a qualified professional.

Circle Circumference Calculator
Calculate the circumference (perimeter) and area of a circle from radi…
Midpoint Calculator
Find the midpoint between two coordinate points.…
Cube Volume Calculator
Calculate the volume, surface area, and diagonals of a cube.…
Cylinder Volume Calculator
Calculate the volume, lateral surface area, and total surface area of …