Privacy

VialMath is a free calculator. It has no accounts and no database. This page explains what happens to the information you use with it.

Your numbers stay on your device

Vial strengths, water volumes, doses and every other number you type are calculated by your browser. They are not sent to us or to any other service.

Saved inputs

To save you retyping, the site keeps your last inputs for each calculator in your browser’s local storage. They never leave your browser. The Reset button, or clearing this site’s data, removes them.

Analytics

We use Google Analytics to count visits and see which parts of the calculator are used. It sets cookies and records the pages you view, your approximate country and your device type. The events we send carry only choices such as which calculator, which syringe size and which warning was shown. We never send the numbers you type or the results.

You can block these cookies with your browser settings or a tracker blocker. The calculator works the same either way.

Hosting

The site is served by Cloudflare. Like any host, it processes each request and may collect basic request and performance data. None of it includes what you type into the calculator.

Contact

Questions about privacy? Email hello@fangfang.me.