Sleep Cycle Calculator
Calculate the optimal time to go to bed or wake up based on your natural sleep cycles
Light Sleep
REM Sleep
Deep Sleep
Advanced Settings
Time needed to become fully alert after waking
Your calculated sleep times will appear here
How Our Sleep Cycle Calculator Works
Sleep Science
Our calculator uses the scientifically-proven 90-minute sleep cycle to determine optimal wake times during light sleep phases.
Personalization
Adjust settings like sleep cycle length, fall-asleep time, and preferred phases to match your unique sleep patterns.
Optimization
Get multiple optimal time options within your preferred window to wake up feeling refreshed and energized.