Disclaimer

Last updated: August 17, 2026

Not medical advice

Chrona's calculators and guides are provided for general informational and educational purposes only. They are not medical advice, and are not a substitute for diagnosis, treatment, or guidance from a qualified physician, sleep specialist, or other healthcare provider. Always consult a professional regarding persistent sleep difficulties, suspected sleep disorders, or any health concern.

Estimates, not guarantees

All calculated times are estimates based on commonly cited averages (such as a 90-minute sleep cycle or a 5–6 hour caffeine half-life). Individual results vary based on age, health, medication, stress, and many other factors outside this tool's knowledge. No calculation on this site should be treated as a precise or guaranteed outcome.

Use at your own discretion

You are responsible for how you use the information provided. Chrona and its operator are not liable for decisions made based on the site's tools or content.

Contact

Questions about this disclaimer: [email protected]