Privacy Policy

Last updated: July 2026

1. No personal data collected

All calculations on OnlineCalculator365 run entirely in your browser using JavaScript. Inputs you enter (dates of birth, names, gestational weeks, etc.) are never sent to any server, stored in any database, or shared with any third party. The data lives only in your browser tab and disappears when you close or refresh the page. In short: we can't lose, sell, or leak your data, because we never have it in the first place.

2. Analytics and cookies

We do not run advertising networks or cross-site tracking pixels. We use two analytics tools to understand which calculators people use. Cloudflare Web Analytics is cookieless and aggregate: it reports page views without identifying you or following you across sites. Google Analytics 4 loads only after you accept it in the cookie banner. Until you accept, it does not run and sets no cookies; if you accept, it sets its own cookies to measure visits and traffic sources in aggregate, and it is configured to anonymize IP addresses. You can decline, or change your mind later by clearing this site's cookies and local storage. Either way, Google Analytics never receives the values you type into a calculator. Every calculation stays in your browser.

3. Hosting

This site is hosted on Cloudflare Pages. Cloudflare may collect standard server access logs (IP address, browser type, page requested, timestamp) for security and infrastructure purposes. These are governed by Cloudflare's privacy policy.

4. Contact form

If you use our contact form, the information you submit (name, email, message) is processed by our form provider. We use this data only to respond to your inquiry and do not share it with third parties for marketing purposes.

5. Changes to this policy

If this policy changes materially, we will update the "Last updated" date above. Continued use of the site after a policy update constitutes acceptance of the updated policy.

6. Contact

Questions about this policy? Contact us.