Most adults need 7–9 hours of sleep per night, but the optimal amount varies by age. Getting enough sleep supports your physical health, mental clarity, mood, and overall quality of life. So how many hours do you actually need? The National Sleep Foundation and American Academy of Sleep Medicine offer science‑based guidance.
Sleep needs by age
- Newborns (0–3 months): 14–17 hours
- Infants (4–11 months): 12–15 hours (including naps)
- Toddlers (1–2 years): 11–14 hours (including naps)
- Preschoolers (3–5 years): 10–13 hours (including naps)
- School-age (6–12 years): 9–12 hours
- Teens (13–18 years): 8–10 hours
- Adults (18–64 years): 7–9 hours
- Older adults (65+): 7–8 hours
Can you “catch up” on weekends?
Occasional weekend catch‑up can reduce sleepiness, but it doesn’t fully reverse the effects of chronic short sleep (like reduced attention, impaired metabolism, and low mood). Aim for a consistent schedule that hits your target most nights, and keep weekend wake times within about an hour of weekdays.
Signs you’re not getting enough sleep
- Daytime sleepiness or dozing off while inactive
- Trouble focusing and increased errors
- Irritability or low mood
- Sugar/caffeine cravings
- Needing an alarm or multiple snoozes most days
How to fall asleep faster and sleep better
- Keep a consistent sleep and wake schedule
- Get morning daylight and regular exercise
- Avoid caffeine after early afternoon; avoid heavy meals and alcohol late
- Dim lights at night; power down screens 60 minutes before bed
- Keep the bedroom cool, dark, and quiet
- Wind down with a relaxing routine
- If you can’t sleep after ~20 minutes, get up and do something calm, then try again
- Consider CBT‑I if insomnia persists
Sources: National Sleep Foundation; American Academy of Sleep Medicine
