Sleep Calculator
Calculate the time you should fall asleep to reach the certain number of sleep cycles.
Enter the time you want to wake up:
Result:
Waiting for Input...
Sleep Calculator calculates what time to fall asleep to reach a certain number of 90-minute sleep cycles.
A good night's sleep should consist of 5-6 cycles.
How to use this Sleep Calculator?
- Enter the time you want to wake up.
- Click "Calculate".
- Check your results!
For example:
Examples
| Time you want to wake up | Number of sleep cycles | Suggested time of falling asleep |
|---|---|---|
| 07:00 AM | 5 | 11:15 PM |
| 05:30 AM | 6 | 08:15 PM |
| 06:00 AM | 6 | 8:45 PM |