Privacy
No accounts or cross-site tracking, and no ads are currently served. Measurements entered into the calculator are processed in your browser, not submitted to our server. Updated October 13, 2026.
Your measurements
Your underbust and bust measurements are used only while the calculator is open. We do not save them in browser storage, add them to the page address or send them to analytics. Copy link shares the calculated bra size, not your measurements. A shared size cannot recreate the measurements or the comparison between calculation methods. Sizes vary by brand.
Older calculator links may already contain measurements in the address. The calculator reads those links and removes the measurement parameters from the current address. Opening an old link still sends its original address to the hosting provider, and copies in bookmarks or earlier browser history are not erased. New result-sharing links do not include measurements.
The converter, sister-size finder and fit check can put a bra-size label in their page address so you can return to or share that result. Those addresses, and size-only calculator links, can remain in browser history. They do not include tape measurements.
Analytics
On braatlas.com we count visits with two cookieless tools. Cloudflare Web Analytics reports aggregate page views, referrers, countries, browsers and load speed; Cloudflare states it uses no cookies or local storage and does not fingerprint visitors. Umami, which we host ourselves, counts page views and actions such as calculating a size or clicking a shop link, without cookies. Calculator and fit-tool events do not include measurements, bra sizes or fit symptoms. Choosing which woman the calculator drawing shows is counted only as a use of the picker: which woman, body or bust shape you chose is not stored or sent. Sending Bra Atlas to a friend shares the home page address only. Umami records page addresses without the part after the "?" or "#".
Hosting
The site is served by Cloudflare, which processes your IP address and request details to deliver pages and block abuse, under its own privacy policy.
Cookies and storage
The site sets no cookies and stores nothing in your browser's local storage.
If you email hello@braatlas.com, your message and address are kept in that inbox so we can reply. Please do not email personal body measurements; use a synthetic example when reporting a calculation problem. We do not add you to any list.
Advertising and affiliates
No ads are currently served. Size pages and tool results carry Amazon Associates search links. As an Amazon Associate I earn from qualifying purchases. Clicking one sends you to an amazon.com search for that size, tagged so Amazon can credit us if you buy; it does not change the size we show, and Amazon's own privacy notice covers what happens on their site. If another affiliate program is joined, this page will be updated first and the change dated.
Sources
Each source was opened and checked on 25 September 2026. Where sources disagree, the page says so instead of picking one silently.
- Cloudflare Web Analytics: no cookies or local storage; no fingerprinting
- Umami: open-source, cookieless analytics, self-hosted by us
- Cloudflare privacy policy