What Time Should I Go to Bed?
The fastest way to find your bedtime isn't guessing — it's working backward from the time you must wake up. Here's the method SleepyClock uses, plus the habits that make it stick.
The backward calculation
Start with your wake-up time. Subtract your sleep cycles (each 90 minutes) and about 15 minutes to fall asleep. That gives you a set of "good" bedtimes — pick the one that fits your evening:
- Wake at 7:00 → bed around 11:15 (5 cycles), 12:45 (4 cycles), or 2:15 (3 cycles).
- Wake at 6:00 → bed around 10:15, 11:45, or 1:15.
Each option ends a cycle in light sleep, so your alarm catches you at the easy-to-wake part.
How much sleep do you actually need?
Cycle counts map to age-based needs:
- Adults (18–64): 7–9 hours → aim for 5–6 cycles.
- Teens (14–17): 8–10 hours → 6 cycles is realistic.
- Older adults (65+): 7–8 hours often suffices.
- School-age children: 9–11 hours — far more than most realize.
Consistency beats perfection
A fixed wake time anchors your body clock. If you wake at the same time every day, your natural sleepiness arrives on schedule — and you fall asleep faster, which protects that 15-minute buffer.
- Keep weekends within 1 hour of your weekday wake time.
- Get bright light (sunlight or a lamp) within 30 minutes of waking — it sets the clock.
- Dim screens 1 hour before bed; blue light delays melatonin.
When a full night isn't possible
Short on time? A strategic nap can bridge the gap — see the complete nap guide for the 20/60/90-minute breakdown, and what a sleep cycle is to understand why length matters.
Find your number
Type your wake-up time and let the math do the rest:
Frequently asked questions
What is the best time to go to bed?
There's no universal "best" time — it depends on your wake time and chronotype. The general target: aim for 7-9 hours of sleep with bedtime aligned to your natural melatonin rise, which for most adults is between 9:30 p.m. and 11:30 p.m.
Is 10pm to 6am the healthiest sleep schedule?
It's a fine target if your chronotype allows it. The bigger predictor of sleep quality is regularity — going to bed and waking at the same time ±30 min, even on weekends. A consistent 1am-9am beats an inconsistent 10pm-6am.
Should I go to bed when I'm not tired?
No — this trains your brain to associate bed with wakefulness. If you're not sleepy within 20 minutes, get up, do something dim and boring (paper book, light stretching), and return only when drowsy. This is core cognitive behavioral therapy for insomnia.
How do I find my ideal bedtime?
Work backward from your required wake time. Take your target wake time, subtract 7.5-9 hours, and you get a sleep-onset window. Start with the midpoint (8 hours before wake) and adjust based on how you feel after 1-2 weeks.
Is it bad to go to bed too early?
Yes, if you can't fall asleep within 20 minutes. Lying awake in bed trains your brain that bed = frustration, which is the opposite of what you want. Better to stay up until you're genuinely drowsy than to "force" an early bedtime.
References
- Carskadon, M. A., & Dement, W. C. (2011). Monitoring and staging human sleep. In: Kryger et al., Principles and Practice of Sleep Medicine, 5th ed.
- American Academy of Sleep Medicine. (2021). AASM Clinical Practice Guidelines. aasm.org.