Privacy
Your body measurements are sensitive information, and this site is built so that it never needs to hold them against you.
Your measurements
Calculations run in your browser. There is no account, no login and no profile on BodyStats, so there is nothing for a measurement to be attached to. Your unit preference is stored in your own browser's local storage and never sent to us. If you share a result link, the values you entered are in that URL because you put them there; the link works because the page recomputes from it, not because we stored anything.
The same rule applies without exception to the pages that handle the most sensitive inputs of all. The child and teen BMI percentile page and the pregnancy weight gain page store nothing: not a child's age, sex, height or weight, not a pre-pregnancy weight, not a current weight, not a week of gestation. There is nothing to opt out of, because nothing is kept. Advertising is suppressed entirely on those pages' results (not moved lower, not filtered, switched off), so a measurement about a child or a pregnancy is never sitting next to an advertisement.
What we count, and how it is kept anonymous
To know which calculators are used and which inputs break them, we record anonymous aggregate events: which calculator ran, the shape of the inputs, the unit system, a country code and the referring page. These records carry no IP address, no device fingerprint, no user or session identifier, and no way to be joined back to a person or to each other. We consider that a design requirement rather than a nicety, and it is why we can promise that no stored measurement on this site is linkable to an individual.
Advertising and third parties
Where advertising is served, the advertising provider may set its own cookies and process data under its own policy, and you will be asked for consent where the law requires it. Ads are not served at all on the medical disclaimer and methodology pages, or on any result showing a very low BMI or a refused goal weight.
If you choose to give us an email address, it is used only for what you asked for, confirmed by a double opt-in, and every message carries a working one-click unsubscribe. We do not sell, rent or share email addresses.
Contact
Questions, access requests or complaints: hello@bodystats.co. BodyStats is published by PineSeed Pty Ltd, Australia.