🛏️ Sleep Cycle Calculator
🛏️ Sleep Cycle Calculator
Calculate optimal wake-up times based on 90-minute sleep cycles for better rest. No affiliate links - this site is supported by user contributions .
Optimal Wake-up Times
– hoursRecommended Wake-up
–:– –
Total Sleep
– hours
Light Sleep
Deep Sleep
REM Sleep
📚 How Sleep Cycles Work
A sleep cycle lasts about 90 minutes and includes light sleep, deep sleep, and REM sleep. Waking up between cycles (at the end of a cycle) helps you feel more refreshed.
Optimal (5 cycles)
7.5 hours
Extended (6 cycles)
9 hours
Minimum (4 cycles)
6 hours