Using the calculators
The calculators run in your browser. What you type isn't sent to us. There are no accounts, no cookies, no analytics and no advertising trackers.
Your browser remembers a few display choices on your device — the weight unit and light or dark theme — so they're the same next time. They never leave your device.
Feedback
If you send feedback with “Report a problem or idea”, we keep:
- your message and the kind you chose;
- your email address, only if you give one;
- a link to the calculator with the settings you had, so we can see the same numbers;
- the date it was sent.
It's stored as a private issue in Weighbench's code repository on GitHub, visible only to the people who build Weighbench. We use it only to reply to you and to improve the site — never for marketing, and we don't sell or share it. Ask in another message and we'll delete it.
Hosting
The site is hosted by Vercel, which, like any web host, handles the technical details of each request (such as your IP address) to deliver pages and protect against abuse. We don't use that information to identify you.
Changes
If this changes — for example when accounts arrive — we'll update this page first.