Circle Calculator

The Circle Calculator is a simple yet powerful tool that helps you instantly calculate the circumference and area of a circle. Whether you're a student, teacher, engineer, or just someone who needs these calculations, this tool simplifies the process.

This calculator provides quick and accurate results based on either radius or diameter input. The clean interface allows for easy use on any device, and you can customize the output by selecting your preferred measurement unit and number of decimal places.

Key features of the Circle Calculator include:

- Calculate based on either radius or diameter

- Instant calculation of both circumference and area

- Adjustable measurement units

- Customizable decimal precision

- Clear, intuitive interface

- Mobile-friendly design

- No registration required

The mathematical formulas used in this calculator are:

- For circumference: C = 2πr (where r is the radius)

- For area: A = πr² (where r is the radius)

This tool is particularly useful for:

- Students learning geometry concepts

- Teachers preparing math examples

- Engineers working on circular designs

- DIY enthusiasts planning projects with circular components

- Anyone who needs quick and accurate circle calculations

The Circle Calculator runs entirely in your browser, ensuring your data remains private and secure. No information is sent to any server.