This site has no forms or accounts and never asks for personal information. The only cookies are from the analytics tools below and a strictly necessary security cookie that Cloudflare, which delivers the site, may set.
What we measure
We use analytics only to learn which calculators people use and where a page is confusing, so we can fix it. We never sell this data, and we do not use it for advertising.
- Google Analytics 4 counts visits and a few actions, such as adding a result to your project list or printing it. It sets first-party cookies (named
_ga) and receives your IP address, which Google does not store. See how Google uses data from sites that use its services. You can opt out with the Google Analytics opt-out browser add-on. - Microsoft Clarity shows us how pages are used: where people click and scroll, and where they get stuck. It sets cookies (named
_clckand_clsk), Microsoft may set its own cookies such asMUID, and it may record the numbers you type into a calculator, but it does not know who you are. See the Microsoft Privacy Statement.
You can also block or delete these cookies in your browser settings; the calculators work the same without them.
Your project list is saved in your own browser’s local storage and never sent to us. Clearing your browser data removes it.
Like any website, our web server and our network provider (Cloudflare) record standard access logs, including your IP address, the page requested and the time, for security and troubleshooting. We do not use them to identify or track visitors.