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 or analytics scripts are enabled.
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 11 September 2026.