Sleep Cycle Calculator

Find the best times to wake up feeling refreshed by aligning with your natural sleep cycles.

Time Format:
:
minutes

Optimal Wake Times

4 Cycles (6 hours):
-
5 Cycles (7.5 hours): Recommended
-
6 Cycles (9 hours):
-
Reference: National Sleep Foundation guidelines. Each sleep cycle lasts approximately 90 minutes and includes light sleep, deep sleep, and REM (dream) sleep phases.