Sleep Calculator

Find the best times to sleep and wake up based on natural sleep cycles (90 minutes each).

Average is 10-20 minutes

Best times to go to sleep:

Sleep Cycles Explained

Cycles Sleep Duration Recommended For
4 cycles 6 hours Minimum for adults
5 cycles 7.5 hours Good for most adults
6 cycles 9 hours Optimal recovery

Tips for Better Sleep

  • Keep a consistent sleep schedule, even on weekends
  • Avoid screens 1 hour before bed (blue light)
  • Keep your bedroom cool (60-67°F / 15-19°C)
  • Avoid caffeine at least 6 hours before bed
  • Exercise regularly, but not close to bedtime

Recommended Sleep by Age

  • Adults (18-64): 7-9 hours
  • Older Adults (65+): 7-8 hours
  • Teenagers (14-17): 8-10 hours
  • Children (6-13): 9-11 hours
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