Privacy Policy

Last updated: June 1, 2026

This Privacy Policy describes how bestbmicalculator.org ("we," "us," or "our") collects, uses, and shares information when you visit our website at bestbmicalculator.org (the "Site").

1. Information We Collect

Calculator inputs: When you use our BMI Calculator, you enter height, weight, and optionally age and sex. These values are processed entirely in your browser. We do not transmit, store, or log your health inputs on our servers.

Usage data: We use Vercel Analytics and Microsoft Clarity to collect anonymised usage data including page views, session duration, device type, and general geographic region. This data does not identify individual users.

Contact form: If you submit the contact form, we collect your name, email address, and message content solely to respond to your inquiry.

2. How We Use Your Information

We use the information we collect to:

• Operate and improve the Site and our BMI Calculator tools
• Analyse anonymised usage patterns to improve user experience
• Respond to contact form submissions
• Comply with legal obligations

3. Cookies and Tracking Technologies

We use the following third-party services that may set cookies or similar tracking technologies:

• Vercel Analytics — anonymised page view and performance data
• Microsoft Clarity — anonymised session replays and heatmaps for UX improvement
• Google AdSense (when active) — serves advertisements and may use cookies for ad personalisation

You can control cookies through your browser settings. Disabling cookies may affect some site functionality.

4. Google AdSense

We may display advertisements served by Google AdSense. Google uses the DoubleClick cookie to serve ads based on your prior visits to this or other websites. You can opt out of personalised advertising by visiting Google's Ads Settings.

5. Third-Party Links

Our Site contains links to external websites including the CDC, WHO, NIH, and Mayo Clinic. These sites have their own privacy policies, and we are not responsible for their practices.

6. Children's Privacy

Our Site is intended for general audiences including parents using the Kids' BMI Calculator on behalf of their children. We do not knowingly collect personally identifiable information from children under 13. BMI inputs entered in the Kids' calculator are not stored or transmitted.

7. Data Retention

We do not retain calculator input data. Anonymised analytics data is retained for up to 24 months. Contact form submissions are retained for up to 12 months.

8. Your Rights

Depending on your jurisdiction, you may have rights including access to, correction, or deletion of your personal data. To exercise any such rights, contact us via our Contact page.

9. Changes to This Policy

We may update this Privacy Policy from time to time. Changes will be reflected with an updated "Last updated" date at the top of this page.

10. Contact

If you have questions about this Privacy Policy, please use our Contact page.