Area, circumference, and diameter from any one dimension.
The Mixadù Circle is a free online calculator that area, circumference, and diameter from any one dimension. It runs entirely in your browser — no sign-up, no uploads, and your inputs never leave your device. Supported units include IN, FT, MM, CM, M.
- Instant results as you type
- Free — no login or sign-up
- Private: runs entirely in your browser
- Part of the 91-tool Engineering Toolkit
Frequently asked questions
Is the Circle free?
Yes. The Circle is completely free, with no login or sign-up.
Are my inputs uploaded anywhere?
No. The Circle runs entirely in your browser; your inputs never leave your device.
Which units does the Circle support?
It supports IN, FT, MM, CM, M.
Does the Circle work on mobile?
Yes. It is fully responsive and works on phones and tablets.