Sleep Cycle Calculator - Free Online Optimal Sleep Times Calculator

Sleep Cycle Calculator

Find the ideal bedtime based on your desired wake-up time and sleep cycles

What are Sleep Cycles?

Sleep cycles typically last about 90 minutes, during which your body moves through different stages of sleep. Waking up at the end of a cycle, rather than in the middle, helps you feel more refreshed.

How to Use This Calculator
  1. Enter your desired wake-up time
  2. Click "Calculate" to see recommended bedtimes
  3. Choose a bedtime that works with your schedule
  4. Allow about 15 minutes to fall asleep

Calculate Your Sleep Schedule

Understanding Sleep Cycles

Sleep Cycle Stages
Stage Description Duration
Stage 1 Light sleep, easily awakened 5-10 minutes
Stage 2 Deeper sleep, body temperature drops 20-30 minutes
Stage 3 Deep sleep, body repairs and regenerates 20-40 minutes
REM Dream sleep, brain is active 10-20 minutes
Tips for Better Sleep
  • Stick to a consistent sleep schedule
  • Create a relaxing bedtime routine
  • Keep your bedroom cool, dark, and quiet
  • Avoid screens before bedtime
  • Limit caffeine and alcohol intake
Signs of Poor Sleep Quality
  • Difficulty waking up
  • Feeling tired during the day
  • Trouble concentrating
  • Irritability
  • Requiring caffeine to function