PRIVACY
Your calculation stays on your device.
The calculator runs in your browser. You do not need an account or email address.
Entered values
The application does not send your vial strength, desired amount, solution volume, syringe selection or saved names to a server. No advertising pixels are enabled. Optional visit analytics is described below.
Google Analytics and your choice
We use Google Analytics 4 only after you opt in, to count visits, see which pages are used, and count calculator use, form submissions (when available), and clicks to email or call. Calculator inputs, saved names, search queries and URL parameters are not sent.
Analytics receives pages viewed, device and browser type, approximate location (at city level), and how you arrived at the site. We do not send names, email addresses or phone numbers. Google processes technical connection data, including your IP address, to derive approximate location. Google Signals and advertising personalisation are disabled.
Only after you opt in, GA4 sets first-party cookies named _ga and _ga_<ID>. We store your Accept or Decline choice in this browser’s local storage (fl_consent and its expiry date) for 12 months. You can use the calculator either way.
lets you change your choice at any time. Choose Decline to stop analytics and delete this site’s Google Analytics cookies. Clearing browser data also clears your choice.
For privacy questions, email info@foundlab.com.au, the published contact for this site’s developer, Foundlab. Please do not include health information or private calculator links.
This is a description of how this site works, not legal advice.
Saving and exporting
Saved calculations use this browser’s local storage. Anyone with access to the same browser profile may be able to see them. Use Remove beside a saved entry to delete it. Clearing this site’s browser data also deletes saved calculations and offline files. JSON exports are files on your device; keep them private.
Share links
Sharing is optional. A share link contains your entered values after the URL’s # character. Browsers do not include this fragment in HTTP requests, but people with the complete link can read the values. It can also remain in your clipboard, browser history or the service you use to send it. Do not include identifying details.
Hosting and offline files
Vercel serves the site. Hosting infrastructure may process routine request information, including IP addresses and technical logs, to deliver and secure pages. That is separate from the calculator’s local processing. The site caches public pages and code so it can work offline after the first completed load. Offline caches contain no saved calculation values.
Read Vercel’s privacy policy for its handling of service data.
External links
Reference links take you to independent sites with their own privacy policies. This site uses a no-referrer policy for outgoing requests. It currently has no affiliate links, email collection or cross-site identifiers.
Last updated 12 October 2026.