Sleep Cycle Calculator

Sleep Cycle Calculator Helps You Wake Up Refreshed

You should try to fall asleep at one of the following times:

Please keep in mind that you should be falling asleep at these times. The average human takes fourteen minutes to fall asleep, so plan accordingly!

If you head to bed right now, you should try to wake up at one of the following times:

Please keep in mind that you should be falling asleep at these times. The average human takes fourteen minutes to fall asleep, so plan accordingly!

I want to wake up at...

Sleep Cycle Calculator: The Five Stages of Sleep Cycle


For a better understanding of how our Sleep Cycle Calculator really works, let’s start by giving you an overview of what the different stages of sleep cycles consist of.

Scientists agreed that sleep stages are categorized into two: NREM (non-rapid eye movement) sleep, and REM (rapid eye movement) sleep.

NREM sleep englobes four stages of sleep out of five:

  • Stage 1: This is when sleep is at its lightest as we slowly start drifting out of consciousness.
  • Stage 2: Going to a deep stage of sleep, our breathing, heart rate and blood pressure slow down.
  • Stage 3: Deeper than the second stage, the blood pressure and heart rate drop lower. We are much less likely to be awakened at this phase.
  • Stage 4: The ‘do not disturb’ stage and the deepest one in all five stages. Your breathing is slower than before, as well as your blood pressure and heart rate.