Privacy Policy

Last updated: May 2026

1. Introduction

Welcome to SleepCalc.tools. This Privacy Policy explains how we collect, use, and protect your information when you use our website. We are committed to protecting your privacy and being transparent about our data practices.

2. Information We Collect

We automatically collect certain technical information when you visit our website:

• IP address (anonymized where possible)
• Browser type and version
• Pages visited and time spent
• Referring website
• Date and time of access

We do not collect any personal information you enter into our calculators. All calculations run locally in your browser and are never sent to our servers.

3. Cookies

We use the following types of cookies:

• Essential cookies: Required for the website to function properly.
• Analytics cookies: We may use Google Analytics to understand how visitors use our site. These cookies collect anonymized data.
• Advertising cookies: We use Google AdSense to display relevant advertisements. Google uses cookies to personalize ads based on your browsing history.

4. Google AdSense

This website uses Google AdSense, a service provided by Google LLC. Google AdSense uses cookies to display personalized advertisements based on your interests. Google's use of advertising cookies enables it and its partners to serve ads based on your visit to our site and other sites on the Internet.

You may opt out of personalized advertising by visiting Google Ads Settings or by visiting aboutads.info.

For more information, please review Google's Privacy Policy.

5. How We Use Your Information

We use the information we collect to:

• Operate and maintain our website
• Understand how visitors use our calculators
• Improve our tools and content
• Display relevant advertisements through Google AdSense
• Comply with legal obligations

6. Data Sharing

We do not sell, trade, or rent your personal information. We may share anonymized, aggregated data with:

• Google Analytics: For website analytics (anonymized data only)
• Google AdSense: For advertising purposes
• Hostinger: Our hosting provider, for server operation

7. Data Retention

Server log files are retained for up to 30 days for security and technical purposes, then automatically deleted.

8. Your Rights

Depending on your location, you may have the following rights:

• Right to access your personal data
• Right to correct inaccurate data
• Right to request deletion of your data
• Right to opt out of data processing
• Right to data portability

To exercise any of these rights, please contact us at: privacy@sleepcalc.tools

9. California Privacy Rights (CCPA)

If you are a California resident, you have additional rights under the California Consumer Privacy Act (CCPA), including the right to know what personal information we collect and the right to request deletion. We do not sell personal information.

10. GDPR (European Users)

If you are located in the European Economic Area, you have rights under the General Data Protection Regulation (GDPR). Our legal basis for processing your data is our legitimate interest in operating the website. You have the right to lodge a complaint with your local data protection authority.

11. Children's Privacy

Our website is not directed to children under 13. We do not knowingly collect personal information from children under 13. If you believe we have inadvertently collected such information, please contact us immediately.

12. Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of any changes by posting the new policy on this page with an updated date. Your continued use of the website after changes constitutes acceptance of the new policy.

13. Contact Us

If you have any questions about this Privacy Policy, please contact us at: privacy@sleepcalc.tools