Privacy Policy

Last updated: 2025

This Privacy Policy explains how HealthCalculators ("we", "our", "us") handles information when you use this website. By using the site you agree to the practices described below.

1. Information we collect

The calculators on HealthCalculators run entirely in your browser using JavaScript. The numbers you type into a calculator (such as height, weight, age or last menstrual period) are never transmitted to our servers. We do not require accounts, do not store user profiles, and do not log calculator inputs.

Like most websites, our hosting provider may automatically collect standard server log data — IP address, user agent, requested URL and timestamp — for security, abuse prevention and aggregated traffic statistics. This information is not combined with any personal identifier.

2. Cookies and local storage

We use a small amount of localStorage on your device to remember preferences such as your selected unit system (metric or imperial). This data stays in your browser and can be cleared at any time from your browser settings.

Third-party services described in section 3 may set their own cookies or similar identifiers in accordance with their own policies.

3. Third-party services

Google AdSense. We may display advertisements served by Google AdSense. Google and its partners use cookies and device identifiers to serve ads based on a user's prior visits to this website or other websites. You can opt out of personalised advertising at google.com/settings/ads, or visit aboutads.info to opt out of third-party vendors' use of cookies for personalised advertising.

Google Analytics or similar measurement. We may use privacy-respecting analytics to count page views and understand which calculators are most useful. Where used, IP addresses are anonymised and no personal identifiers are collected.

Third parties may also use cookies to comply with legal requirements (e.g., to honour a user's "Do Not Track" or consent choices in regions such as the EU/UK and California).

4. Children's privacy

HealthCalculators is a general-audience website and is not directed to children under 13 (or the equivalent minimum age in your jurisdiction). We do not knowingly collect personal information from children. If you believe a child has provided us with personal information, please contact us so we can remove it.

5. Your rights (GDPR / CCPA)

Because we do not collect or store personally identifiable information from calculator inputs, there is generally no personal record to access, correct or delete. For questions about advertising data collected by Google or other partners, please use the opt-out links in section 3 or contact those providers directly.

EEA, UK and California residents have additional rights under GDPR and the CCPA, including the right to object to the processing of personal data and the right not to be discriminated against for exercising those rights.

6. Data security

Because calculator inputs never leave your device, the most sensitive data on this site never reaches us. Our static site is served over HTTPS to protect content integrity in transit.

7. International users

Our site is hosted on servers that may be located outside your country. By using the site you consent to the processing of any data described in this policy in those locations.

8. Changes to this policy

We may update this Privacy Policy from time to time. Material changes will be reflected by a new "Last updated" date at the top of this page. Continued use of the site after a change constitutes acceptance of the updated policy.

9. Contact

For privacy questions, email info@healthcalculators.pro.