How much sleep do I need? Recommended hours by age
How much sleep do I need? See the recommended hours by age from newborns to older adults, why it is a range, and how to find your own best number.
Most adults need 7 to 9 hours of sleep a night. That is the honest answer for anyone past their teens, and 7 hours is the floor most people should not drop below on a regular basis. The exact number changes with age: newborns need 14 to 17 hours, the requirement falls steadily through childhood, and it settles into that 7 to 9 hour band for the rest of adult life.
Below is the full picture by age, why “how much” is a range rather than a single figure, and how to find the number that actually fits you.
Recommended sleep by age
These are the consensus ranges used by the CDC, the American Academy of Sleep Medicine, and the National Sleep Foundation. For young children the totals include daytime naps.
| Age group | Recommended sleep |
|---|---|
| Newborn (0 to 3 months) | 14 to 17 hours |
| Infant (4 to 12 months) | 12 to 16 hours, with naps |
| Toddler (1 to 2 years) | 11 to 14 hours, with naps |
| Preschool (3 to 5 years) | 10 to 13 hours, with naps |
| School-age (6 to 12 years) | 9 to 12 hours |
| Teen (13 to 17 years) | 8 to 10 hours |
| Adult (18 to 64 years) | 7 to 9 hours |
| Older adult (65+ years) | 7 to 8 hours |
The pattern is a long, smooth decline from infancy to adulthood, then a flat line. A common mistake is assuming the decline keeps going, so that seventy-year-olds “only need five hours.” They do not. The need stays near 7 to 8 hours; it just gets harder to fill in one unbroken stretch.
Why it is a range, not one number
Notice that every row is a span of two or three hours, not a fixed target. That is deliberate. Two healthy adults of the same age can genuinely need different amounts, and the difference is not laziness or willpower. It comes from genetics, daily physical and mental load, whether you are fighting an illness, and how efficient your sleep is.
There is also a floor and a ceiling. Consistently sleeping below the bottom of your range builds a deficit that catches up with you. Regularly sleeping well above the top can, for some people, signal that the sleep they are getting is poor quality, or occasionally point to an underlying issue worth mentioning to a doctor. The range is where health lives; the edges are where you start paying attention.
A true “short sleeper” who thrives on six hours does exist, but this is rare and largely genetic. Most people who claim it are simply used to running tired and have forgotten what fully rested feels like.
Quality matters, not just the total
Hours are only half the equation. Sleep moves through cycles of light sleep, deep sleep, and REM, and each stage does a different job for your body and brain. Eight hours broken up by frequent waking, late alcohol, or a noisy room can leave you groggier than seven solid hours would.
So the question is really two questions: are you spending enough time asleep, and is that time restful? Hours set the ceiling on how rested you could be. Quality decides how close you get to it. If you are hitting your hours but still waking unrefreshed, the problem is usually quality, and the usual suspects are caffeine, alcohol, screens, stress, and an irregular schedule. Our guide on how to fix your sleep walks through fixing those, and sleep cycles and the best time to wake up explains why waking at the end of a cycle feels so much easier.
How to find your own number
The chart gives you a range. Finding your personal number inside it takes a little observation.
- Pick a target inside your age band. For most adults, start at 8 hours and adjust from there.
- Keep a fixed wake time. Your body clock anchors to when you get up, so hold that steady, including weekends, for a couple of weeks.
- Work backward to a bedtime. Count back your target hours plus about 15 minutes to fall asleep. The sleep calculator does this instantly and lines your bedtime up with full sleep cycles.
- Judge by your days, not your nights. The real signal is daytime: steady energy, a clear head by mid-morning, and no urge to nap or reach for a third coffee. If you need an alarm to drag yourself up and feel wrecked until noon, add 30 to 60 minutes and try again.
A short, honest log makes the pattern obvious. Our better sleep planner lets you set your target hours and log each night’s duration and quality, so your own best number stops being a guess and shows up in the data. It runs entirely on your own device, with no account and nothing sent anywhere.
Signs you are already short
You do not need a lab to know you are underslept. The everyday tells are a heavy reliance on caffeine, an afternoon energy crash, irritability, trouble concentrating, and falling asleep the instant your head hits the pillow, which sounds like a gift but usually means you were overtired. Sleeping several hours longer on weekends than weekdays is another giveaway: that extra time is your body trying to repay sleep debt.
If your evening coffee is part of the problem, it helps to know how long caffeine stays in your system before you plan your day around it.
When to talk to a clinician
This is general education, not medical advice. If you regularly get enough hours but still wake unrefreshed, snore heavily, gasp or stop breathing in your sleep, or feel dangerously sleepy during the day, those can be signs of a sleep disorder such as sleep apnea, and they are worth raising with your own doctor. Persistent insomnia, sleep that suddenly changes, or exhaustion that does not lift with rest also deserve a professional look rather than another late night spent guessing.
Your next step is simple: pick a realistic target from your age band, set a fixed wake time, and use the sleep calculator to find the bedtime that gets you there tonight.
Frequently asked questions
How much sleep do I need as an adult?
Most adults need 7 to 9 hours of sleep a night, with 7 hours being the floor most people should not drop below regularly. Your own number sits somewhere in that range and depends on genetics, activity, health, and age. The reliable test is how you feel and function during the day, not the number on a clock.
Is 6 hours of sleep enough?
For most adults, no. A small minority function well on 6 hours, but for the large majority it leaves a nightly shortfall that builds into sleep debt. If you rely on caffeine to get through the morning or crash in the afternoon, 6 hours is probably too little for you.
How much sleep do children and teens need?
Sleep needs fall as children grow: toddlers need 11 to 14 hours including naps, preschoolers 10 to 13, school-age children 9 to 12, and teens 8 to 10. Teenagers in particular are often chronically short because early school start times clash with their naturally later body clock.
Do older adults need less sleep?
Not really. Adults over 65 still need about 7 to 8 hours. What changes is the pattern: sleep often becomes lighter and more broken, and the timing shifts earlier. Needing less time in bed is a common myth; the need stays similar even when getting it becomes harder.
Does sleep quality matter more than hours?
Both matter. Eight hours of fragmented, shallow sleep can leave you more tired than seven solid hours. Hours set the ceiling on how rested you can be, and quality decides how much of that potential you actually get.
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