What time should I go to bed if I wake up at 10:15 AM?

Go to bed at 2:30 AM for 7.5 hours of sleep, or 1:00 AM 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.

Wake up at

Personalise: age, time to fall asleep, cycle length

Age Time to fall asleep Sleep cycle length Clock

To wake up at 10:15 AM, go to bed at one of these times:

1:00 AM

9 hours · 6 cycles

2:30 AM

7.5 hours · 5 cycles

4:00 AM

6 hours · 4 cycles

5:30 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 10:15 AM wake-up

Go to bed at	Sleep	Cycles
1:00 AM	9 hours	6	Good for teens and people who need more sleep
2:30 AM	7.5 hours	5	Recommended for most adults
4:00 AM	6 hours	4	Short: below the 7-hour minimum
5:30 AM	4.5 hours	3	Very short: only for an emergency

Bedtime by age for a 10:15 AM wake-up

Who	Needs	Latest bedtime	Bedtime in sync with cycles
School-age child (6–12)	9+ hours	1:00 AM	1:00 AM
Teenager (13–18)	8+ hours	2:00 AM	1:00 AM
Adult (18–64)	7+ hours	3:00 AM	2:30 AM
65 and older	7+ hours	3:00 AM	2:30 AM

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 asleep	Bedtime for 5 cycles	Bedtime for 6 cycles
5 minutes	2:40 AM	1:10 AM
15 minutes	2:30 AM	1:00 AM
30 minutes	2:15 AM	12:45 AM

A late wake-up time like this is common for people who work evenings or who are natural “night owls”. That’s fine as long as you get enough sleep and keep a regular schedule. If you work nights, the shift work planner can help.

Frequently asked questions

What time should I go to bed if I wake up at 10:15 AM?

Go to bed at 2:30 AM for 7.5 hours of sleep (5 sleep cycles), or at 1:00 AM for 9 hours (6 cycles). Both include 15 minutes to fall asleep.

What time should I fall asleep to wake up at 10:15 AM?

Aim to be asleep by 2:45 AM for 7.5 hours, or 1:15 AM for 9 hours.

Is going to bed at 4:00 AM enough sleep if I wake up at 10:15 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

9:15 AM9:30 AM9:45 AM10:00 AM10:30 AM10:45 AM11:00 AM11:15 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.