Circle Calculator is a simple and free application used to calculate the values of key circle parameters quickly and easily.

Caculate area of circles
Circle Calculator will display the area of a circle instantly as you type the radius, the diameter, or the circumference of that circle.

Caculate circumference of circles
Circle Calculator will display the circumference of a circle instantly as you type the radius, the diameter, or the area of that circle.

Caculate diameter of circles
Circle Calculator will display the diameter of a circle instantly as you type the radius, the circumference, or the circumference of that circle.

Caculate radius of circles
Circle Calculator will display the radius of a circle instantly as you type the diameter, the circumference, or the area of that circle.

Clear all values quickly
Circle Calculator can clear all values quickly to start a new calculation.

Free
Circle Calculator is completely free.

Simple
Circle Calculator is super simple, super easy to use.

No advertisements
Circle Calculator does not contain any advertisements.

No in-app purchases
Circle Calculator does not contain any in-app purchases.

Lightweight
Circle Calculator is super lightweight. The installation size is under 20 kilobytes.

Support old devices
Circle Calculator supports super old devices. The application can run on Android 1.5 and above.