Sleep Calculator - Find Best Time to Sleep & Wake Up
Optimize your sleep with our free sleep calculator. Find the best time to wake up or go to sleep based on 90-minute sleep cycles for better rest.
Sleep Cycle Calculator
Sleep Cycle Facts:
- • Each sleep cycle is ~90 minutes
- • Waking at cycle end feels more refreshing
- • Most adults need 5-6 cycles (7.5-9 hours)
- • Allow 15 minutes to fall asleep
Best Wake Up Times
Enter your desired sleep time to see optimal wake up times
How Sleep Cycles Work
Sleep occurs in cycles of approximately 90 minutes. Each cycle consists of light sleep, deep sleep, and REM (Rapid Eye Movement) sleep. Waking up at the end of a complete cycle typically leaves you feeling more refreshed than waking up in the middle of a cycle.
Sleep Cycle Calculator Benefits
- Wake up feeling more refreshed and alert
- Reduce morning grogginess and sleep inertia
- Optimize your sleep schedule for better rest
- Plan bedtimes and wake times around natural sleep patterns
- Improve overall sleep quality and daytime performance
Tips for Better Sleep
For optimal sleep quality, maintain a consistent sleep schedule, avoid caffeine late in the day, create a comfortable sleep environment, and allow 15-30 minutes to fall asleep naturally.
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