Geometry Calculators
Calculate volumes of various 3D shapes with our geometry calculators
Circle Area Calculator
Calculate the area and circumference of a circle
Circle Dimensions
How to use
- Enter the radius of your circle
- Select your preferred units
- The area will be calculated automatically
Circle Visualization
Radius
The area of a circle is calculated using the formula: A = πr², where r is the radius.
This calculator handles unit conversions automatically, allowing you to input the radius in any length unit and get the area in your preferred area unit.