Calculate the best time to go to bed or wake up based on 90-minute sleep cycles. Optimize your sleep!
Choose whether you want to know what time to wake up or go to bed, then enter the corresponding time.
Calculate the best time to go to bed or wake up based on 90-minute sleep cycles. Optimize your sleep!
Choose whether you want to know what time to wake up or go to bed, then enter the corresponding time.
Sleep is organized in cycles of approximately 90 minutes each. Each cycle includes several phases: light sleep, deep sleep, and REM (Rapid Eye Movement) sleep.
Waking up in the middle of a cycle causes feelings of tiredness and drowsiness, even after a long night. Waking up at the end of a complete cycle generally leaves you feeling more rested and alert.
Our calculator accounts for an average fall-asleep time of 14 minutes. This delay corresponds to the average time a healthy person takes to fall asleep after lying down.
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