Sleep Cycle Calculator · Wake up at 6 AM
What time should you go to bed to wake up at 6 AM?
Your night, if you wake at 6 AM
Every cycle-aligned bedtime for a 6 AM wake-up
| Go to bed | Cycles | Total sleep |
|---|---|---|
| 8:45 PMBest | 6 | 9h |
| 10:15 PMBest | 5 | 7.5h |
| 11:45 PM | 4 | 6h |
| 1:15 AM | 3 | 4.5h |
The math is easy. Winding down in time is the hard part.
6 AM is the classic office-worker alarm, and the real reason people miss their cycle isn't the arithmetic — it's that they decide to sleep at 10:15 PM but are still on their phone at 10:14. If 10:15 PM is your target lights-out, start winding down — screens off, lights low, no more email — by 9:30 PM. Treat that earlier time as the real "bedtime"; the number in the table is just when your eyes should already be closed.
Different wake-up time? Recalculate
Change the wake-up time or drag the slider to match how long you take to fall asleep.
Questions about a 6 AM wake-up
What time should I go to bed to wake up at 6 AM?
Go to bed at 8:45 PM for six cycles (9 hours) or 10:15 PM for five cycles (7.5 hours). Five cycles suits most adults. Both times target the end of a 90-minute cycle so you wake in light sleep.
Is 10:15 PM enough sleep before 6 AM?
10:15 PM to 6 AM is 7.5 hours of sleep across five full cycles, within the 7–9 hours recommended for most adults — and timed so your alarm doesn't interrupt deep sleep.
I can't sleep before midnight. What's my best option?
Go to bed at 11:45 PM for four complete cycles (6 hours). Fewer hours, but waking at a cycle boundary still tends to beat a longer night cut off mid-cycle. If late nights are the norm, consistency matters more than any single bedtime.