Circle Area Calculator — Free Online Circle Geometry Tool
Free circle calculator. Enter a radius, diameter, or circumference to compute all properties of a circle — area, circumference, diameter, and radius — instantly.
Fraction to Decimal Converter
Convert fractions to decimals and decimals to fractions instantly.
How to Use This Circle Area Calculator
- Enter the radius, diameter, or circumference.
- All other values are automatically calculated.
- See area, circumference, diameter, and radius.
Common Use Cases
- Calculate circular garden or pool area
- Find pipe or cylinder cross-section area
- Solve geometry homework problems
Frequently Asked Questions
This tool is for informational purposes only. Read our disclaimer.
Need help with this tool? help@bodhins.com
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Calculate the hypotenuse or any side of a right triangle using a² + b² = c².
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