Circle Calculator
Calculate circle properties online for free. Find area, circumference, diameter, and radius from any known measurement.
CIR
Coming SoonMath & Science
The full version of Circle Calculator is being built right now. We add new fully functional tools every week. In the meantime, you can use the basic workspace below.
About Circle Calculator
Calculate circle properties online for free. Find area, circumference, diameter, and radius from any known measurement.
This tool is completely free and runs 100% in your browser. Your data is never uploaded to any server — everything is processed locally on your device for maximum privacy and speed.
About Circle Calculator
Calculate circle properties online for free. Find area, circumference, diameter, and radius from any known measurement.
Features
- 100% free with no sign-up required
- Runs entirely in your browser for full privacy
- No data stored, no files uploaded to servers
- Works on desktop and mobile devices