
SLEEP CYCLE
CALCULATOR
OPTIMAL REST
The Science of Sleep Timing
Calculating your sleep cycles is the simplest way to wake up feeling refreshed. By mapping your bedtime to natural 90-minute sleep phases, you avoid waking during deep, heavy rest.
1. Map the 90-Min Cycles
2. Add the Fall-Asleep Buffer
3. Wake in Light Sleep
Healthy sleep consists of five to six full cycles. Aim for 7.5 or 9 hours of total rest to complete them.
The average person takes fifteen minutes to drift off. Factor this window into your target bedtime calculation.
Time your alarm to go off at the end of a cycle. You will wake up naturally alert, free from morning fog.