Sleep Time Calculator

Calculate the best time to wake up or go to bed based on sleep cycles.

A typical sleep cycle lasts about 90 minutes. Many adults feel rested with about 5–6 full cycles (roughly 7.5–9 hours of sleep), but needs can vary from person to person.

You'll get a few suggested times that line up with complete sleep cycles.

Tips for Better Sleep

  • • Stick to a consistent sleep schedule, even on weekends
  • • Create a relaxing bedtime routine
  • • Keep your bedroom cool, dark, and quiet
  • • Avoid screens 1-2 hours before bedtime
  • • Limit caffeine and heavy meals close to bedtime
  • • Exercise regularly, but not too close to bedtime