Sleep Calculator

Sleep Calculator

Based on 90-minute sleep cycles

Find the perfect bedtime or wake-up time to rise feeling refreshed and energized

What time do you want to wake up?

:

Recommended Bedtimes

To wake up refreshed at , you should go to sleep at one of these times:

How it works

The average person takes 15 minutes to fall asleep

A complete sleep cycle lasts about 90 minutes

A good night’s sleep consists of 4-6 complete sleep cycles

Waking up between cycles helps you feel more refreshed