Privacy policy
The short version: calculators run entirely in your browser, we don't see what you type into them, and we keep no accounts and no user database.
What runs on these pages
All calculator math executes locally in your browser; inputs never leave your device. Our host (Cloudflare) collects privacy-preserving aggregate analytics (page views, country, browser family) without cookies and without tracking you across sites. Standard server logs (IP, user agent, timestamp) exist briefly at the infrastructure level, as they do for every website.
Advertising
If advertising is enabled on a page, it's served by Google AdSense, which may use cookies or device identifiers subject to Google's own policies; consent mechanisms apply where law requires them. Affiliate links, where present, set a referral cookie on the destination site, not here.
If you email the contact address, we keep the thread for as long as it's useful and share it with nobody.
Questions about any of this: the same contact page. Effective 2026-07-15.