The short version
BMI Fast has no accounts, no sign-ups, and no server-side storage of your data. The height, weight, and body measurements you enter are processed entirely in your browser and are never transmitted to us. Like most free websites, we show ads (Google AdSense) and use privacy-friendly analytics (Vercel Web Analytics), which involve the third-party data practices described below.
Information you enter into the calculators
All calculations (BMI, TDEE, ideal weight, body fat) run locally in your browser using JavaScript. Your measurements are not sent to our servers or to any third party by our code. For your convenience, your most recent inputs are saved in your browser's localStorage so they're still there when you return. This data stays on your device; you can clear it at any time by clearing your browser's site data for bmifast.app.
Advertising (Google AdSense)
We use Google AdSense to display ads, which is how this free site is funded. Google and its partners may use cookies and similar technologies to serve ads based on your prior visits to this and other websites.
- Google's use of advertising cookies enables it and its partners to serve ads based on your visits to this site and/or other sites on the internet.
- You can opt out of personalized advertising by visiting Google Ads Settings.
- For more on how Google uses data from sites that use its services, see How Google uses information from sites or apps that use our services.
Analytics
We use Vercel Web Analytics to understand aggregate site usage (page views, country-level location, device type). It does not use cookies and does not track individual visitors across sites. See Vercel's analytics privacy documentation for details.
Cookies
BMI Fast itself does not set cookies. Third-party services we use — primarily Google AdSense — may set cookies as described above. Your browser settings let you block or delete cookies; the calculators will continue to work fully with cookies disabled.
Children's privacy
This site is intended for general audiences and is not directed at children under 13. We do not knowingly collect personal information from anyone, including children.
Your rights
Because we don't collect or store personal data on our servers, there is no personal data for us to access, correct, or delete. For data held by Google (advertising) or Vercel (analytics), please refer to their privacy policies linked above. Depending on where you live (e.g., the EU/EEA under GDPR or California under CCPA), you may have additional rights with respect to those third parties.
Changes to this policy
If we change this policy, we'll update this page and the date at the top. Material changes (such as adding a new third-party service) will be reflected here before they take effect.