Sleep Calculator
Optimize your sleep schedule and cycles
Optimize Your Sleep
Sleep Guidelines
Young Adults (18-25)
7-9 hours recommended
Optimal: 8.5 hours
Adults (26-64)
7-9 hours recommended
Optimal: 8 hours
Older Adults (65+)
7-8 hours recommended
Optimal: 7.5 hours
Sleep Cycle Facts
- • Each sleep cycle lasts about 90 minutes
- • 4-6 complete cycles per night is optimal
- • Wake up at the end of a cycle to feel refreshed
- • Allow 15 minutes to fall asleep
Sleep Stages
Light Sleep (N1): 5% - Transition to sleep
Deep Sleep (N2): 45% - Body restoration
Deep Sleep (N3): 25% - Physical recovery
REM Sleep: 25% - Mental restoration
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Your Sleep Schedule
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