Circle / Sphere Calculator

This calculates diameter, perimeter and area of a circle in any unit and also the volume of a sphere.

How to Use
First choose the correct unit in the corresponding pull-down-menu before you type a value. Type your given values into the corresponding fields. Click on any free space of the window or the “calculate” button and the calculation will be performed. You can use the “reset” button to reset the process.

Please send us feedback or an email if you have suggestions on how to improve this site for your use or if you would like to see more conversions calculator included.

There is no warranty from Units Calculator for the conversion. Please check your data and result before use, for Units Calculator is not responsible for damage of any kind caused by wrong results produced.