Sleep Cycle Calculator

Calculate optimal wake-up times based on 90-minute sleep cycles. Wake up at the end of a cycle to feel more refreshed and energized.

⏰ When do you want to wake up?

Wake Up Time

It takes the average person 14 minutes to fall asleep. We'll factor this in.

😴 Sleeping now?

We'll calculate the best wake-up times based on when you fall asleep (assuming 14 minutes to fall asleep).

Your optimal sleep times will appear here.

💡 How Sleep Cycles Work

• 90-Minute Cycles: Each sleep cycle lasts about 90 minutes
• 4-6 Cycles: Most adults need 4-6 complete cycles (6-9 hours)
• Wake Between Cycles: Waking up between cycles helps you feel more refreshed
• Fall Asleep Time: Average person takes 14 minutes to fall asleep