Sleep Cycle Calculator
Find the perfect time to fall asleep or wake up
Calculate Your Optimal Sleep Time
Recommended Bedtimes
These times include the 15 minutes you typically need to fall asleep.
Understanding Sleep Cycles
A typical sleep cycle lasts about 90 minutes. During the night, you go through multiple complete sleep cycles.
Each cycle consists of light sleep, deep sleep, and REM (Rapid Eye Movement) sleep. Waking up in the middle of a deep sleep cycle can leave you feeling groggy and tired.
This calculator helps you find the optimal times to fall asleep or wake up by calculating when you'll be at the end of a sleep cycle, helping you wake up feeling more refreshed.
For adults, 5-6 complete sleep cycles (7.5-9 hours) is generally recommended for optimal health.