About
These are HTML calculators built to run on any device with a browser, developed
to be accurate, robust, and easy to use. All of them are free to use online.
The Basic Calculator lives on the home page. It's a four-function calculator with calculation history, memory, percent, and more, fully resizable to whatever screen it's on. It holds up in the office, classroom, and at home.
How This Stays Free
Banner ads are how the site pays for itself. No account to create, nothing to buy, and nothing about you sold to anyone. Open the page and calculate.
Custom Work
These calculators can be embedded in your own website. Past projects have included custom builds with corporate branding, dedicated calculator panels, and one-off features tailored to a business. Get in touch if you have something in mind.
Who's Behind This
 | I'm John Whitney, and I write and maintain the calculators here. I started with the one I wanted for myself, something fast that kept my history and didn't ask me to sign up, and kept going from there. I've never paid to advertise this site. People find it through search, or because someone passed it along. If a calculator here has earned a spot in your bookmarks, mention it to someone who'd use it. https://Internet-Calculator.com — John Whitney |
A portion of our ad revenue supports
Western Lands Preservation . . .
