Privacy
The arithmetic happens on your own device, which is a technical property of how this site is built rather than a promise about how carefully a server is run.
Educational arithmetic only. Not medical advice and not a dosing protocol.
What happens to what you type
Nothing. Every panel computes in the browser, in JavaScript served as a static file. The figures entered are never sent anywhere, because there is nowhere to send them: this site has no API, no form action, no database and no server-side code at all.
That is checkable rather than asserted. Open your browser's network panel, fill in any panel here, and watch no request leave while the answer changes.
No analytics, no advertising, no cookies
This site sets no cookies, runs no analytics, carries no advertising and loads no third-party script, font, pixel or tag. Every file a page requests comes from this domain.
So there is no consent banner, because there is nothing to consent to.
What the host necessarily sees
The site is served as static files from a content delivery network, which handles each request in order to answer it. That involves the technical information any web server receives: an IP address, a user agent, the path requested and a timestamp. No analytics account is attached to it and no profile is built from it.
No personal data is collected by this site, so there is none to export, correct or delete. Nothing typed into a panel forms part of any record anywhere.
Links out
Pages here link within this domain and nowhere else. This site holds no compound data, so it has no occasion to link to a chemical record, and it does not link to other calculators.
There are no social buttons, embeds or share widgets, all of which load third-party code by definition.