How to use Area Calculator
What Area Calculator does#
Quickly calculate the area of common shapes — rectangle, square, circle, triangle, trapezoid and parallelogram. Pick a shape, enter its dimensions and get the area (plus perimeter or circumference where it applies). Runs entirely in your browser.
How to use it#
- Open the tool and enter your values.
- Adjust any options or units.
- Read the result, calculated as you type.
- Copy or reuse the result wherever you need it.
Your privacy#
Area Calculator runs entirely in your browser. Your data never leaves your device — there is no upload, and nothing is stored on our servers.
Frequently asked questions
Is Area Calculator free to use?
Yes. Area Calculator is completely free and needs no account or sign-up.
Is my data private?
Yes. Area Calculator works entirely in your browser, so your data never leaves your device.
Do I need to install anything?
No. Area Calculator runs online in any modern browser, on desktop or mobile.