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Optimize Your Sleep with Sleep Cycles
Formula
Each sleep cycle lasts approximately 90 minutes and includes light sleep, deep sleep, and REM stages. Waking up at the end of a cycle rather than in the middle helps you feel more refreshed and alert.
Most adults need 4-6 complete sleep cycles (6-9 hours) per night. This calculator works backward from your wake-up time to suggest optimal bedtimes aligned with complete cycles.
Common use cases:
- Improving morning alertness
- Optimizing sleep schedule
- Reducing sleep inertia
Frequently Asked Questions
Maria Gonzalez
Registered Dietitian, RD, MPH
Maria is a Registered Dietitian with a Master's in Public Health. She focuses on evidence-based nutrition assessment tools including BMI, calorie calculations, and body composition analysis.
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