Sleep Calculator

Select the time you'd like to wake up:

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Click here to see your optimal bedtimes

Optimal Bedtimes

It takes the average human about 15 minutes to fall asleep. To wake up refreshed you should go to bed at one of the following times:

  • 10:45 PM
  • 12:15 AM
  • 1:45 AM
  • 3:15 AM
  • 4:45 AM
  • 6:15 AM

If you go to bed at one of these times, you should rise at the end of the 90-minute sleep cycles. A good night's sleep consists of 5-6 complete sleep cycles.

Start again


This sleep calculator will determine the right time you should go to sleep for you optimal 90 minute REM cycles. Falling to sleep at one of the suggested times will ensure you get the best amount of sleep depending on the time you want to wake up.