Circle Area Calculator
Calculate the area, circumference, and diameter of a circle. Enter Radius to get Area, Circumference and Diameter. Free, no signup — runs in your browser.
Parameters
Enter the required details below
Ready to Calculate
Enter your parameters and click calculate to see the results here.
How to Use
- Enter Radius.
- Click Calculate to see Area, Circumference and Diameter.
- Check the result. Use Reset if you want to try different numbers.
About This Calculator
Calculate the area, circumference, and diameter of a circle. This tool is in the Math Calculators collection on Qalculators. Enter Radius to calculate Area, Circumference and Diameter. Results stay in your browser unless you copy them.
Frequently asked questions
What does Circle Area Calculator calculate?+
Calculate the area, circumference, and diameter of a circle. You enter Radius and receive Area, Circumference and Diameter.
What information do I need for Circle Area Calculator?+
You need Radius. Optional fields can stay at their defaults.
Is Circle Area Calculator free to use?+
Yes. Circle Area Calculator is free and does not require an account. The calculation runs in your browser.
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