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What is the Circle Calculator?
The Circle Calculator computes the area and circumference of a circle given its radius. It uses the mathematical constant Pi (π).
How to Use This Calculator
1
Enter the radius of the circle.
2
Click 'Calculate' to see the Area and Circumference.
Example Calculation
Radius = 5
Area = π * 5² ≈ 78.54. Circumference = 2 * π * 5 ≈ 31.42.
Frequently Asked Questions
Pro Tips
- Remember that area is measured in square units (e.g., cm²), while circumference is a length (e.g., cm).
- Double-check if you are given the diameter or the radius.