Legal
Privacy Policy & Terms of Use
Effective Date: January 1, 2026
1. Privacy Policy & Data Handling
At The Sleep Time Calculator, we believe your personal sleep habits are your business, not ours. Our privacy philosophy is simple: we collect as little as possible.
What we don't collect
We don't store your bedtime, wake-up time, age, or any calculator inputs on our servers. All calculations happen locally in your browser. We don't sell, share, or rent personal data.
What we do collect
Anonymous analytics (page views, device type, country) via Google Analytics, with IP anonymization enabled, to understand which guides are useful. We use functional cookies only.
2. Cookies & Tracking
We use Google Analytics (G-TFN7Y77E5C) with IP anonymization to count visits to each page. We use local storage on your device only to remember your last calculator settings and theme preference, these never leave your browser. You can clear these any time via your browser settings.
3. Terms of Use
The Sleep Time Calculator provides educational information and a sleep cycle calculator tool. By using this site, you agree:
- Information here is for general education and is not medical advice.
- For persistent sleep issues, consult a licensed healthcare provider.
- Calculator outputs are based on average sleep-cycle research; individual results vary.
- You will not use this site for unlawful purposes or attempt to disrupt its operation.
4. Limitation of Liability
We provide this calculator "as is" without warranty of any kind. We are not liable for any direct, indirect, or consequential outcomes arising from use of the calculator or content on this site.
5. Contact
Questions about privacy or these terms? Reach us via the contact page.