Privacy

Short version: the calculators run entirely in your browser and we do not collect what you type.

What we collect

• No account, no sign-up, no form that sends data to us.
• No cookies and no local storage.
• No advertising and no third-party scripts.

Anonymous visit count

To know which calculators are useful, each page sends one small anonymous request to this site itself. It says only which page was opened, the type of site you came from (for example a search engine, an AI assistant, or a direct visit), that a calculator returned a result, and whether US or metric units were chosen. It never contains the numbers you enter, and carries no identifier: we cannot tell two visits by the same person apart.

Server logs

This site is hosted on Cloudflare Pages. To deliver the pages and protect them against attacks, Cloudflare processes standard technical data (IP address, date, page requested, browser type) under its own privacy policy. We read only aggregated counts from these logs and do not use them to identify visitors.

Changes

If we add advertising later, this page will be updated before it goes live, and any consent required by law will be requested first.

Last updated: October 16, 2026.