Last updated: 12 November 2026.
What data this site collects, what it deliberately never collects, and how anything you send us is handled.
The short version
This site is a calculator and a set of reference pages. It has no accounts, no sign-up, no comments and no checkout. The calculator runs entirely in your browser, and the numbers you type into it are never sent to, or stored on, any server.
Calculator inputs
Everything you enter into the calculator — vial sizes, water volumes, doses, syringe choices — is processed locally on your device by the page’s own code, purely to display your result. Those inputs are not transmitted, logged or saved, and they disappear when you close or reload the page. There is no server-side record of any calculation.
Information we collect
- No accounts: the site offers no registration or login, so we hold no names, passwords or profiles.
- No tracking for advertising: we do not sell personal data, and we do not build profiles of visitors.
- Standard server logs: like almost every website, the hosting that serves these pages may record basic technical information (such as IP address, browser type and pages requested) for security and operation. This is not linked to anything you type into the calculator.
Cookies
The calculator itself sets no cookies and stores nothing between visits. Any cookies connected with this site are covered in detail in our Cookie Policy, including how to control or delete them in your browser.
The contact form and email
The contact form on this site is handled in your browser only: submitting it shows an on-screen confirmation and does not store or transmit the contents. If you contact us by email once our address is published, we will use your address and message only to reply to you and to fix or improve the site content you wrote about. We do not add enquirers to mailing lists and we do not share correspondence with third parties.
Third-party links
Pages on this site may link to external websites (for example, regulators or reference sources). We do not control those sites, and their own privacy policies apply once you leave this one. We recommend reading the policy of any site you visit from here.
Children
This site is an educational maths reference intended for adults managing their own prescribed treatment. It is not directed at children and collects no data from them knowingly.
Changes to this policy
If the site’s features change — for example, if analytics are ever added — this policy will be updated first and the date at the top of this page will change. Questions about privacy can be sent through the Contact page.