✨ Sleep Better
Sleep Cycle Calculator
Wake up feeling refreshed by calculating the ideal time to sleep or wake up, respecting your body's natural cycles.
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The 90-Minute Cycle Theory
Quality sleep isn't just about the number of hours — it's about completing full cycles. Each sleep cycle lasts approximately 90 minutes.
Waking up in the middle of a cycle (deep sleep) is what causes that groggy, "hungover" feeling, even after many hours of sleep. The secret is to wake up during the light sleep phase, at the end of a cycle.
How many cycles are ideal?
- 57h 30min — Most adults feel good with this average.
- 69h 00min — Ideal for those who need intense physical recovery.