😴 Sleep Calculator

Optimize your wake-up time

Why sleep cycles matter

Sleep is divided into cycles of approximately 90 minutes. Waking up at the end of a cycle helps you feel more refreshed and alert.

Best sleep duration

Most adults need between 7 and 9 hours of sleep for optimal health, focus and recovery.

How this calculator works

We calculate optimal wake-up times based on full sleep cycles of 90 minutes starting from your bedtime.

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