Circle Calculator

Circle calculator for quick and easy calculation of circumference, area, diameter and radius. Also you can calculate about nine parameters of inscribed square in a circle as easy as for circle.

You only need to enter one value to calculate the data. The interactive and easy-to-use design will tell you which characteristic of the circle you have selected. The value can be entered in a convenient unit of measurement, and the calculation will be made in the same units of measurement.