About calcwindow.com
calcwindow.com is a free calculator workspace. Instead of one calculator that you keep clearing, you open as many calculator windows as you need and arrange them on the page.
Why we built it
Real calculations rarely fit in a single window. You compare two prices, check a tax amount, convert a currency and keep a running total, all at the same time. Switching between tabs or erasing the display loses your numbers. calcwindow.com keeps each calculation in its own window so you can see them together.
What you can do
- Open up to eight windows at once, each with its own state.
- Switch any calculator between Standard and Scientific mode.
- Convert between major currencies in a dedicated converter window.
- Drag windows anywhere, snap them to each other with Magnet, rename them and duplicate them.
How it works
All calculations run in your browser. There is no account, no sign-up and nothing to install. The numbers you type into a calculator are not sent to our servers. Read our Privacy Policy for details.
Learn more
Our guides explain how to get the most out of the calculators, including scientific functions, percentage calculations and currency conversion.
Get in touch
Questions, bug reports and suggestions are welcome. See the contact page.