Going to sleep right now?
If you head to bed now, you should wake up at one of the following times to complete natural 90-minute sleep cycles and wake up alert.
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90-Minute Sleep Cycles
Human sleep progresses through Light Sleep, Deep Sleep, and REM. Waking up in the middle of Deep sleep leaves you feeling groggy (sleep inertia).
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14-Minute Latency Buffer
The average adult takes approximately 14 minutes to transition from lying down to actual Stage 1 sleep. Our calculator includes this buffer automatically.
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Recommended 5-6 Cycles
7.5 hours (5 cycles) or 9.0 hours (6 cycles) provides optimal cognitive repair, memory consolidation, and physical tissue recovery.