Easy Sleep cycle calculator. Wake up to the perfect time.

You should wake up between your sleep cycles then you feel the most energized after sleep.

Sleep cycles
A sleep cycle lasts about 90 minutes, and during that time we move through five stages of sleep. Across these four stages we move from very light sleep during Stage 1 down to very deep sleep in Stage 4. During the final stage of sleep we have bursts of rapid eye movements. This is the stage of sleep in which most dreaming occurs.

This is a test.