Sleep Calculator
Wake up between natural 90-minute sleep cycles to avoid grogginess and start your day energized.
Enter your target wake-up time and we'll calculate the ideal bedtimes to ensure you wake up refreshed.
Sleep Cycles
Waking up during light sleep makes you feel instantly alert.
* Calculations include an average 15 minutes to fall asleep. A normal sleep cycle lasts roughly 90 minutes.
9:45 PM
9 Hours of Sleep
6 Cycles
Optimal
11:15 PM
7.5 Hours of Sleep
5 Cycles
Optimal
12:45 AM
6 Hours of Sleep
4 Cycles
Okay
2:15 AM
4.5 Hours of Sleep
3 Cycles
Poor
3:45 AM
3 Hours of Sleep
2 Cycles
Poor
5:15 AM
1.5 Hours of Sleep
1 Cycles
Poor