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Geometry

Circle Calculator

Solve circle measurements from one known value.

Preparing Circle Calculator

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Input

Use radius, diameter, circumference, or area to find the rest. You will see the result first and the step-by-step solution below.

Input summary

Your calculator summary shows here.

Step by Step Calculation

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Step by step calculation shows here

Calculate first and the full working will appear below automatically.

How to use Circle Calculator

Enter the values you know, tap Calculate to see the result first, then review the optional step-by-step solution below.

What this calculator is for

Use radius, diameter, circumference, or area to find the rest.

Tips

Use clean numbers and symbols so the solver reads them correctly.
For lists, separate numbers with commas, spaces, or new lines.
For matrices, put each row on a new line.

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