What is the Circumference Calculator?

The Circumference Calculator is a tool that calculates the total distance around a circle using either its radius or diameter. It applies the standard formulas 2πr2\pi r2πr for radius and πd\pi dπd for diameter to instantly provide the accurate circumference based on your selected input type. After entering your value and choosing whether it represents the radius or diameter, the calculator displays the final circumference clearly in the result box. This tool is helpful for students, teachers, designers, and anyone needing fast circle measurements for geometry work, construction layouts, or everyday calculations.

How to Use:

1. Enter Value: Type the radius or diameter of the circle into the input box.
2. Select Type: Choose whether the entered number is the circle’s radius or diameter.
3. Click “Calculate”: The calculator uses the proper formula and shows the circumference.
4. Review the Result: Use the calculated value for geometry tasks, measurement planning, or design-related work.