What time should I go to bed if I wake up at 6:15 AM?

Go to bed at 10:30 PM for 7.5 hours of sleep, or 9:00 PM for 9 hours.

Both times give you whole 90-minute sleep cycles, so you wake up in lighter sleep, and include 15 minutes to fall asleep.

Personalise: age, time to fall asleep, cycle length

To wake up at 6:15 AM, go to bed at one of these times:

9:00 PM
9 hours · 6 cycles
10:30 PM
7.5 hours · 5 cycles
12:00 AM
6 hours · 4 cycles
1:30 AM
4.5 hours · 3 cycles

Includes 15 minutes to fall asleep. Adults need 7 to 9 hours, so 7.5 hours (5 cycles) is marked as the best fit.

All bedtimes for a 6:15 AM wake-up

Go to bed atSleepCycles
9:00 PM9 hours6Good for teens and people who need more sleep
10:30 PM7.5 hours5Recommended for most adults
12:00 AM6 hours4Short: below the 7-hour minimum
1:30 AM4.5 hours3Very short: only for an emergency

Bedtime by age for a 6:15 AM wake-up

WhoNeedsLatest bedtimeBedtime in sync with cycles
School-age child (6–12)9+ hours9:00 PM9:00 PM
Teenager (13–18)8+ hours10:00 PM9:00 PM
Adult (18–64)7+ hours11:00 PM10:30 PM
65 and older7+ hours11:00 PM10:30 PM

Recommended sleep: AASM and CDC. Latest bedtime gives the minimum sleep for that age, plus 15 minutes to fall asleep.

If you take longer to fall asleep

Time to fall asleepBedtime for 5 cyclesBedtime for 6 cycles
5 minutes10:40 PM9:10 PM
15 minutes10:30 PM9:00 PM
30 minutes10:15 PM8:45 PM

This is a common wake-up time for work and school. Keeping it the same every day, including at weekends, is one of the best things you can do for your sleep, because it anchors your body clock.

Frequently asked questions

What time should I go to bed if I wake up at 6:15 AM?
Go to bed at 10:30 PM for 7.5 hours of sleep (5 sleep cycles), or at 9:00 PM for 9 hours (6 cycles). Both include 15 minutes to fall asleep.
What time should I fall asleep to wake up at 6:15 AM?
Aim to be asleep by 10:45 PM for 7.5 hours, or 9:15 PM for 9 hours.
Is going to bed at 12:00 AM enough sleep if I wake up at 6:15 AM?
It gives about 6 hours of sleep. That’s 4 full cycles, but less than the 7 hours adults are advised to get, so it’s best kept for the occasional night.

Other wake-up times

5:15 AM5:30 AM5:45 AM6:00 AM6:30 AM6:45 AM7:00 AM7:15 AM

For general information only, not medical advice. If you often feel tired despite enough sleep, snore loudly, or have trouble sleeping most nights, talk to a doctor.