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What time will I wake up if I go to bed at 4:00 AM?
If you get into bed at 4:00 AM and take the average 15 minutes to fall asleep, here are the wake-up times that land at the end of a full sleep cycle rather than in the middle of one — the highlighted options fall within the 7–9 hours recommended for most adults.
8:45 AM
3 cycles · 4h 30m sleep
10:15 AM
4 cycles · 6h 0m sleep
11:45 AM
5 cycles · 7h 30m sleep
1:15 PM
6 cycles · 9h 0m sleep
2:45 PM
7 cycles · 10h 30m sleep
Want to adjust for your own age group, or how long you actually take to fall asleep? Use the full sleep calculator.