About This Calculator
This tool helps you find optimal bedtimes based on how long it takes you to fall asleep and your desired wake-up time, using sleep cycle theory for long, average, and short sleepers.
How to Use
- Enter how many minutes you usually take to fall asleep.
- Select your target wake-up time.
- The calculator shows three recommended bedtimes based on different sleep needs.
Frequently Asked Questions
How does sleep cycle theory work?
Sleep cycles last about 90 minutes. Waking at the end of a cycle can help you feel more refreshed.
Why are there multiple bedtime options?
To suit different sleep needs—some people feel best with more or fewer sleep cycles.
Is this useful for irregular sleep schedules?
Yes, it offers helpful estimates even if your sleep timing varies.