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Sleep Calculator
Calculate optimal bedtime and wake time
5 min30 min
About Sleep Calculator
This calculator helps you determine the best times to go to bed or wake up based on 90-minute sleep cycles. Waking up at the end of a sleep cycle helps you feel more refreshed and energized.
How It Works:
- Each sleep cycle lasts approximately 90 minutes
- A complete cycle includes light sleep, deep sleep, and REM sleep
- Waking between cycles feels more natural than mid-cycle
- Most adults need 5-6 cycles (7.5-9 hours) per night
Note: These calculations are estimates. Individual sleep needs vary, and factors like age, lifestyle, and health conditions affect optimal sleep duration. Consult a healthcare provider for personalized advice.