Privacy
The arithmetic happens on your own device. That is a technical property of how the site is built, not a promise about how carefully a server is operated.
Educational arithmetic only. Not medical advice and not a dosing protocol.
What happens to the figures you type
Nothing. Every tool on this bench computes in the browser, in JavaScript served as a static file. The figures entered into a form are never sent anywhere, because there is nowhere for them to be sent: this site has no API, no form action, no database and no server-side code of any kind.
That is verifiable rather than asserted. Open the network panel in your browser, fill in any tool here, and watch no request leave while the answer changes.
No analytics, no advertising, no cookies
This site sets no cookies, runs no analytics, embeds no advertising and loads no third-party script, font, pixel or tag. Every file a page requests comes from this domain.
There is consequently 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 the request in order to answer it. That involves the usual 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 you type into a tool is part of any record anywhere.
Links out
Pages here link to the host of this site only, and nowhere else. This bench 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, no embeds and no share widgets, all of which load third-party code by definition.