If I sleep at 3:00 AM, when should I wake up?
Going to bed at 3:00 AM? Set your alarm for 10:45 AM (7.5 hours) or 9:15 AM (6 hours) to wake between sleep cycles.
Adjust for how you sleep
Most adults fall asleep in 10 to 20 minutes. If you wake up groggy even at the suggested times, try an 85 or 95 minute cycle for a week.
Alarm times after a 3:00 AM bedtime
| Wake up at | Sleep | How it'll feel |
|---|---|---|
| 7:45 AM | 3 cycles, 4.5 h | Running on fumes |
| 9:15 AM | 4 cycles, 6 h | Okay for one night |
| 10:45 AM | 5 cycles, 7.5 h | Fresh, recommended |
| 12:15 PM | 6 cycles, 9 h | Fully rested |
Assumes you fall asleep about 15 minutes after lights out and that each cycle lasts 90 minutes.
About a 3 AM bedtime
3 AM is a night shift worker's lunch hour and everyone else's mistake. If you're up this late, protect the morning.
The later the bedtime, the more it depends on a late start the next day. If your morning is fixed, move this bedtime earlier in 15 minute steps until you reach five full cycles.
Sleeping at 3:00 AM: common questions
If I sleep at 3:00 AM, when should I wake up?
Set your alarm for 10:45 AM to get five full cycles (7.5 hours), or 12:15 PM for six cycles (9 hours). If you need to be up earlier, 9:15 AM gives four cycles (6 hours).
How many hours of sleep do I get if I sleep at 3:00 AM and wake at 10:45 AM?
About 7.5 hours of actual sleep, assuming you take 15 minutes to fall asleep. That's five complete cycles, the sweet spot for most adults.