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Create a QR code for a link, Wi-Fi, WhatsApp, contact and more, or read one from a photo.
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- Works on any device
Fill in the details to see your QR code.
PNG for phones, chats and websites. SVG and PDF stay sharp at any size, which is best for printing. Tip: point your phone camera at the preview to test it.
3. Style (optional): colors, dots, logo
Choose a photo or screenshot or drag it here
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Area calculator
Area and perimeter of squares, rectangles, triangles, circles, trapezoids, ellipses and more.
- Free
- No sign-up
- Works on any device
About Area calculator
Get the area and perimeter of common shapes: squares, rectangles, triangles, circles, trapezoids, ellipses and more. Examples include rectangle length times width, triangle half base times height, and circle pi times radius squared. Useful for flooring, paint, landscaping, school homework and land plots.
How to use Area calculator
- Enter your numbers above.
- The result updates instantly as you type.
- Change any value to compare different cases.
Why use this tool?
- Private: everything happens in your browser. Nothing you enter is uploaded.
- Free, with no sign-up, no watermark and no limit on how often you use it.
- Works on phones, tablets and computers: Android, iPhone, Windows, Mac and Linux. Nothing to install.
- Available in 10 languages.
Also known as
Frequently asked questions
How do I find the area of a trapezoid?
Add the two parallel sides, multiply by the height, and divide by two.
Is Area calculator free?
Yes. Area calculator on Toolipedia is free to use, with no sign-up and no watermark.
Is it safe to use?
Yes. Everything is worked out in your browser, and nothing you enter is sent to our server.
Does it work on my phone?
Yes. It works in any modern browser on Android and iPhone, as well as on tablets and computers. There's nothing to install.
Do I need an account?
No. Just open the page and use the tool. There's no sign-up and no email needed.