🌙 90-Min REM Sleep Algorithm
Sleep Cycle & Optimal Bedtime Calculator
Find your ideal bedtime or wake-up times based on 90-minute REM cycles. Wake up fresh, energized, and without brain fog.
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Optimal Bedtimes:
Includes 14m sleep latency6 Cycles (9.0h) Recommended
21:46
Optimal Sleep
5 Cycles (7.5h) Recommended
23:16
Optimal Sleep
4 Cycles (6.0h)
00:46
Minimum Sleep
3 Cycles (4.5h)
02:16
Sleep Deficit
The Science of 90-Minute Sleep Cycles
1
Light Sleep (N1-N2)
Heart rate slows, muscles relax. Waking during this phase feels easy and effortless.
2
Deep Sleep (N3)
Physical tissue recovery and growth hormone release. Interrupting it causes sleep inertia.
3
REM Sleep
Memory consolidation, emotional regulation, and dreaming. Essential for mood.
Track Your Sleep Routine with Aura
Log your sleep and mood in Aura and see how your sleep quality connects to your daily mood.
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