Circle Calculator
Calculate radius, diameter, circumference, and area from any one circle measurement.
Radius
5.0000
Diameter
10.0000
Circumference
31.4159
Area
78.5398
Formulas Used
| π (pi) | 3.14159265 |
| C = 2πr | 31.4159 |
| A = πr² | 78.5398 |
Use the Circle Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.
Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.
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