How Much Sleep Do Kids Need by Age
In this post
Every parent has asked this question at some point, usually while looking at a child who is wide awake at ten at night, or a child who is grumpy and slow at seven in the morning. How much sleep do kids need, and does the answer change as they grow? Yes, it changes a great deal. A baby sleeps most of the day. A toddler sleeps for about half the day, including a nap. A school child needs nine to twelve hours. A teenager needs eight to ten. The amount falls slowly as the child grows, because the body and brain need less sleep once the fastest period of growth has passed, but the need never disappears. A child who sleeps enough is usually easier to teach, easier to feed, and easier to live with than a child who is short of sleep, and that is true at every age from two to twelve.
This article gives the usual hours for each age, in plain words, so that a parent can see where their child sits and what a normal pattern looks like. These are general ranges from health organisations, not rules for one particular child. Every child is a little different, and a child who is a little above or below the range, but who wakes up rested, eats well, plays happily, and learns at school, is probably getting enough sleep. A child who is tired every day, whatever the number of hours, deserves a closer look at the bedtime, the bedroom, and the day that came before it. This is general information only, not personal advice, and if a child has a lasting sleep problem, a doctor is the right person to talk to.
The Hours by Age, in Plain Words
The simplest way to see the pattern is to walk through the ages in order. Newborn babies, from birth to three months, sleep for fourteen to seventeen hours a day, in short stretches, day and night. They wake to feed, and then they sleep again. There is no day and night pattern yet, and that is normal. Babies from four to twelve months sleep for twelve to sixteen hours a day, including naps, and by the end of this period many of them sleep for a longer stretch at night. Toddlers, from one to two years, need eleven to fourteen hours a day, including one nap. Children aged three to five, the preschool years, need ten to thirteen hours, including a nap for the younger ones. School children, aged six to twelve, need nine to twelve hours a night, usually without a nap. Teenagers, aged thirteen to eighteen, need eight to ten hours.
Those numbers may look like a lot, especially for a school child who is asked to be in bed by eight or half past eight. But they make sense when you think about what a child’s body is doing. A young child is growing fast, learning new words every day, learning to walk, to talk, to read, and to make friends. All of that learning is stored during sleep, and the brain needs a long night to do it. A school child is learning to read and write, to do sums, to play games with rules, and to sit still in a classroom. That is hard work for a young brain, and it needs a full night to recover from it. When a child sleeps nine to twelve hours, they are not wasting time. They are giving the brain the time it needs to keep what was learned that day.
It also helps to count the whole day, not only the night. A toddler who sleeps ten hours at night and naps for two hours in the afternoon has had twelve hours in total, which sits inside the range. A preschool child who sleeps ten hours at night and naps for an hour has had eleven hours, which is also inside the range. Parents often worry when a child stops napping, but stopping naps is normal as a child grows, and it usually means the night sleep has become longer to make up for it. The test is always the same: does the child wake up rested, stay alert through the day, and fall asleep at a reasonable hour at night? If the answer is yes, the total is probably right, whatever the exact split between night and nap may be.
Toddlers: Eleven to Fourteen Hours, With a Nap
Toddler sleep is often the most tiring stage for parents, because a toddler’s sleep is broken, active, and full of strong opinions. A child of one or two years usually needs eleven to fourteen hours in a day, with most of it at night and one nap in the middle of the day. The nap is not a luxury at this age. It is part of the total, and a toddler who misses it will often be tearful, clumsy, and hard to settle in the evening, which surprises many parents. They expect a tired toddler to fall asleep easily, but a very tired toddler often becomes more active, not less, and then finds it harder to wind down. That is why a regular nap, at roughly the same time each day, helps the evening go more smoothly, even though it may feel like the nap is stealing time from the day.
A toddler’s bedtime is usually early by adult standards, often between seven and eight in the evening, and that is a good thing. An early bedtime gives the toddler a long night, and it gives the parents an evening of their own. The bedtime routine matters more at this age than at any other. A bath, a story, a quiet song, and a dark room, done in the same order every night, tells the toddler’s body that sleep is coming, and over time the body learns to feel sleepy when the routine begins. A toddler who is given a different routine every night, or who is allowed to play with bright toys until the moment they are put in bed, will take much longer to settle, not because they are naughty, but because their body has not been given a clear signal.
There are two common worries at this age, and both are normal. The first is waking in the night. Many toddlers wake once or twice, call out, and then fall asleep again, especially when they are ill, teething, or going through a change like starting nursery. A calm, brief response, with little light and little talking, usually helps them settle again. The second is the move from a cot to a bed, which often happens around the age of two or three. A new bed feels exciting, and a toddler may get up again and again to explore it. A steady routine, a night light if the child is afraid of the dark, and a calm return to bed, repeated patiently, usually settles the pattern within a week or two. Patience is the main tool at this age, because a toddler’s sleep improves slowly, not in a single night.
Preschool Children: Ten to Thirteen Hours
Children aged three to five need ten to thirteen hours of sleep a day, and many of them still nap, especially at three and four. A child of three who sleeps ten hours at night and naps for an hour and a half has had eleven and a half hours, which is inside the range. A child of five who sleeps eleven hours at night and no longer naps has also had enough. The change from napping to not napping happens at different times for different children, and there is no need to force it in either direction. If a child falls asleep easily at night and wakes rested, the nap is no longer needed. If a child is tearful and tired in the late afternoon, a short nap may still help, even at five years old.
This is also the age when fears and dreams become part of sleep. A child of four may be afraid of the dark, may worry about monsters, or may wake from a bad dream and call for a parent. Those fears are normal, and they are a sign that the child’s imagination is growing, not a sign that something is wrong. A night light, a favourite soft toy, and a calm, short reassurance usually help more than a long discussion in the middle of the night. It also helps to keep the evening calm and to avoid scary stories or frightening programmes before bed, because a child’s mind carries the images of the evening into the night. A story that is exciting in the afternoon can feel frightening at bedtime, when the room is dark and quiet.
Starting nursery or preschool changes sleep as well, because it brings a fixed wake-up time, often earlier than the child is used to. A child who used to wake at eight now has to wake at seven, which means bedtime must move earlier too, or the child will lose an hour of sleep every night. That lost hour shows up quickly: the child becomes tearful at nursery, finds it hard to sit still, and catches colds more easily. The fix is simple, though it takes a week or two to settle: move bedtime earlier by fifteen minutes every few nights, until the child is sleeping long enough for the new wake-up time. A regular wake-up time, even on weekends, helps the body clock settle, and it makes Monday mornings far easier than a weekend of very late mornings followed by a sudden early start.
School Children: Nine to Twelve Hours
School children, aged six to twelve, need nine to twelve hours of sleep a night, and this is the age where the shortfall becomes most visible at school. A child of seven who needs ten or eleven hours, but who goes to bed at ten and wakes at six for school, is getting only eight hours, and that missing two hours shows up in the classroom. The child finds it hard to concentrate, forgets instructions, and becomes tearful or angry over small things. Teachers often notice this before parents do, because the classroom asks for steady attention in a way that home does not. A child who is short of sleep can play happily at home and still struggle at school, because play is easy and learning is hard, and a tired brain finds hard work much harder than easy play.
The bedtime for a school child depends on the wake-up time, and it is worth working it out backwards. If a child must wake at six thirty for school, and they need ten hours, they must be asleep by eight thirty, which means bedtime should be around eight, to allow time to fall asleep. That feels early to many families, especially when the evening is full of homework, dinner, and family time, but the maths does not change because the evening is busy. The only way to give a child ten hours with a six thirty wake-up is an eight thirty bedtime. If the family wants a later bedtime, the wake-up time must move later, which is usually not possible on a school day. That is why the evening routine matters so much at this age: homework started earlier, dinner at a regular time, and a calm last hour can make an eight o’clock bedtime possible, while a late dinner and late homework make it impossible.
This is also the age when a child’s own wishes start to matter more. A child of eight or nine may want to stay up later, like an older brother or sister, or like the adults in the house. That wish is natural, and it deserves a kind answer, not a dismissal. A parent can explain the reason in simple words: your body is still growing, and it needs a long night to grow and to remember what you learned at school. A child who understands the reason is more likely to accept the bedtime than a child who is simply told to go to bed because it is the rule. It also helps to give the child a small choice inside the rule, such as which book to read, which pyjamas to wear, or which soft toy to take to bed. A small choice gives the child a feeling of control, and that feeling makes the bedtime easier to accept, night after night.
Why Sleep Falls as Children Grow
Parents often wonder why a baby needs seventeen hours and a school child needs only ten, and the answer is growth. A baby is growing at an extraordinary speed, doubling its weight in the first months, learning to see, to hear, to move, and to recognise voices. That work needs a great deal of sleep, and the baby’s brain uses sleep to build the connections it needs for all of those new skills. A toddler is still growing fast, learning to walk and talk, and still needs eleven to fourteen hours. A school child is growing more slowly, and has already learned the basic skills of moving and talking, so the need falls to nine to twelve hours. A teenager is growing again, in a new way, and needs eight to ten. An adult, who has finished growing, needs seven to nine. The pattern is a slow fall, with a small rise in the teenage years, and it follows the work the body is doing at each stage.
The brain also changes how it sleeps as it grows. A young child’s sleep is deeper, with more of the deep sleep that helps the body grow and repair. An older child’s sleep becomes lighter, with more dreaming sleep, which helps with learning and memory. That is why a young child can sleep through noise that would wake an older child, and why an older child may wake more easily. It is also why a child’s sleep needs cannot be judged only by the clock. A child who sleeps ten hours deeply and wakes rested is better rested than a child who spends twelve hours in bed but wakes often and sleeps lightly. The quality of the sleep matters as much as the number of hours, and quality is shaped by the bedroom, the evening, and the day that came before it.
There is another change that parents often miss: as children grow, they become better at hiding tiredness. A toddler who is tired will cry, fall over, and refuse to eat, and the tiredness is plain to see. A school child who is tired may become quiet, or may become hyperactive and silly, which looks like the opposite of tiredness. A child who is tired may also say they are not tired, because they do not want to go to bed, or because they do not recognise the feeling. Parents who rely only on what the child says will often miss the tiredness. Parents who watch the child’s behaviour over a week, noticing the tearfulness, the forgetfulness, and the difficulty in the morning, will usually see the pattern more clearly. The behaviour is the clue, not the child’s words.
Signs a Child Is Not Sleeping Enough
The signs of short sleep in a child are different from the signs in an adult, and they are easy to mistake for something else. An adult who is short of sleep looks tired, moves slowly, and says they are tired. A child who is short of sleep often looks the opposite: they become more active, more noisy, and harder to settle, as if their body is fighting the tiredness by moving more. They may also become tearful over small things, argue with brothers and sisters, or refuse food they usually enjoy. At school, they may find it hard to sit still, forget instructions, or lose interest in lessons they used to like. At home, they may fall asleep in the car, or on the sofa in the early evening, which is a clear sign that the body is overtired.
Another sign is the morning. A child who has slept enough usually wakes fairly easily, even if they are slow for the first few minutes. A child who has not slept enough often needs to be woken several times, moves very slowly, and complains of a headache or a sore body. They may also eat little breakfast, because a tired body has little appetite in the morning. If this happens once, after a late night at a family event, it is nothing to worry about. If it happens most mornings, for weeks, it is a sign that the bedtime is too late for the wake-up time, and that the child needs an earlier bedtime, not a later wake-up. The same is true of the weekend: a child who sleeps two or three hours longer on Saturday than on a school day is probably catching up on a week’s shortfall, and that long sleep is useful information for the parents.
Illness is another clue. A child who is short of sleep catches colds more easily, and takes longer to recover from them, because sleep is part of how the immune system works. That does not mean that every cold is caused by short sleep, and it does not mean that a child who sleeps well will never be ill. It means that sleep is one of the things that helps the body stay well, and that a child who is often ill and often tired may benefit from an earlier bedtime. If a child snores loudly every night, wakes gasping, or stops breathing for a few seconds during sleep, that is different, and it is worth mentioning to a doctor, because it can be a sign of a sleep problem that needs a proper check. For most children, though, the signs are simpler: tired mornings, tearful afternoons, and difficulty at school, all of which improve when the child sleeps a little longer, night after night.
Bedtime Routines That Work at Each Age
A bedtime routine is not a luxury. It is the signal that tells a child’s body that sleep is coming, and it works at every age, though it looks different at each one. For a toddler, the routine may be a bath, a story, and a song, lasting about half an hour. For a preschool child, it may be a bath, a story, and a quiet talk about the day, lasting about forty minutes. For a school child, it may be a shower, a book in bed, and a short chat, lasting about half an hour. The exact steps matter less than the repetition. When the same steps happen in the same order every night, the child’s body learns to feel sleepy when the routine begins, and falling asleep becomes easier. When the routine changes every night, the body has no signal to follow, and bedtime becomes a negotiation every evening.
The bedroom itself matters too. A child’s bedroom should be dark, quiet, and cool, as far as that is possible. A dark curtain, a door that closes, and a room that is not too hot all help the body fall asleep. A night light is fine if the child is afraid of the dark, and it should be dim, not bright. The bed should be for sleep, not for play, and toys that light up or make noise should be put away at bedtime. A favourite soft toy or blanket can stay, because it gives the child comfort, and comfort helps a child fall asleep. A television or tablet in the bedroom makes sleep harder, because it brings light and excitement into the room where the body should be winding down. If a screen is used in the evening, it should be used in another room, and stopped at least half an hour before bed.
The last hour before bed should be calm, whatever the child’s age. That means no new arguments, no exciting games, and no worrying news just before bed. It means a light evening meal, eaten a few hours before bed, rather than a heavy meal at bedtime. It means a regular bedtime, kept as steady as possible, even on weekends, so that the body clock does not swing wildly from one day to the next. It also means daylight and movement during the day, because a child who has played outside, walked, or run during the day usually sleeps more deeply than a child who has sat indoors all day. None of these things is dramatic on its own. Together, they create the conditions in which a child’s body can sleep well, and that is the best help a parent can give.
My Take:
If you ask me how much sleep a child needs, I will not give you a single number, because a single number would be wrong for half the children who hear it. I will give you the range for the age, and then I will tell you to watch the child. A toddler needs eleven to fourteen hours, a preschool child needs ten to thirteen, and a school child needs nine to twelve, and those ranges are useful, but they are only a starting point. The real answer is in the mornings, in the mood, and in the school day. A child who wakes up rested, who plays happily, who eats well, and who can sit and learn at school is probably sleeping enough, even if the number is at the lower end of the range. A child who is tearful every morning, who falls asleep in the car, and who cannot concentrate at school is probably not sleeping enough, even if the number looks right on paper. I think parents know this in their hearts, but they are often told to trust a chart instead of trusting what they see. I would trust what you see, and use the chart as a guide, not as a judge.
I think the hardest part of children’s sleep is not the child. It is the evening. The evening in a busy family is full of cooking, cleaning, homework, and the wish for a little time together after a long day. An early bedtime for a child can feel like losing that family time, and many parents keep their child up later because they want to see them, talk to them, and enjoy them after work. I understand that feeling completely, because the evening is often the only time a working parent has with their child. But I think we need to be honest about the trade. An extra hour with a tired child in the evening often means a harder morning, a tearful school day, and a child who is too tired to enjoy the evening anyway. A child who goes to bed at eight and wakes rested at seven will enjoy the morning, the school day, and the next evening far more than a child who stays up until ten and wakes up exhausted. The family time that matters is not the hour at night when the child is already tired. It is the time during the day, and in the morning, when the child is fresh and ready to play and talk.
I also think we should talk about how children’s sleep has changed in recent years, because screens have entered the bedroom in a way that did not exist a generation ago. A child who has a tablet in bed is not only seeing bright light. They are also receiving excitement, jokes, and worries at the very moment their brain should be slowing down. I do not think the answer is to blame the child for wanting the tablet, because the tablet is designed to be hard to put down, and a child has far less self-control than an adult. I think the answer is for the family to agree a rule together, and to keep the rule steady. A screen that stops half an hour before bed, and charges outside the bedroom, is a rule that most children can accept, especially if the adults follow it too. A child who sees a parent scrolling in bed will not believe that screens are the problem, and a child who sees a parent reading a book in bed will learn that bedtime is a calm time. Children copy what they see far more than what they are told, and that is especially true about sleep.
There is something else I want to say, and it is about the parents themselves. Parents of young children are often very tired, and they are often told that tiredness is simply part of having children. I think that is unfair, and I think it makes children’s sleep harder, because a tired parent finds it harder to keep a steady routine, to stay calm at bedtime, and to wake early in the morning. If you are a parent who is exhausted, I would not tell you to try harder. I would tell you to look for one small change that helps you as well as the child. A regular bedtime helps the parent too, because it gives them an evening. A calm last hour helps the parent too, because it gives them a quiet end to the day. A child who sleeps well is a gift to the whole family, not only to the child, and a parent who protects that sleep is protecting their own rest as well. That is not selfish. It is sensible, and it is the way a family stays steady over months and years.
I want to say something about the age-by-age numbers themselves, because I think they are often read as rules when they should be read as guides. A child of six who sleeps nine hours and wakes up bright and ready for school is not failing because the range says nine to twelve. A child of six who sleeps twelve hours and still wakes up tired is not succeeding because the number is at the top of the range. The number is only useful when it is read together with the child. I have seen parents worry because their child sleeps an hour less than a cousin of the same age, and I have seen parents worry because their child sleeps an hour more. In both cases, the worry was unnecessary, because the child was healthy, happy, and learning well. Children are different, in the same way that adults are different, and a range exists precisely because one number cannot fit every child. Use the range to check whether you are roughly in the right place, and then trust the child’s mornings, mood, and school work to tell you the rest.
I also think about school, because school is where a child’s sleep becomes a public matter, not only a family matter. A teacher sees twenty or thirty children in a morning, and they can usually tell which ones slept well and which ones did not. A rested child sits, listens, and asks questions. A tired child fidgets, forgets, and becomes tearful over small things. I think teachers and parents should talk about this openly, without blame, because it is not a matter of a good parent or a bad parent. It is a matter of a bedtime that fits the school start time, and a family evening that allows that bedtime to happen. If a teacher notices that a child is tired every morning, a kind conversation with the parent can help far more than a note about homework. And if a parent notices that homework is taking so long that bedtime keeps slipping later, a kind conversation with the teacher can help too. A child sleeps best when the adults around them work together, and that cooperation is worth more than any single rule about bedtime.
Another point I feel strongly about is naps, because naps are often treated as a problem when they are simply a stage. A toddler who naps is not lazy, and a preschool child who has stopped napping is not more grown up than one who still naps. Naps end at different times for different children, and forcing a child to nap when they no longer need it can make bedtime harder, while forcing a child to stop napping when they still need it can make the afternoon miserable. The best approach is to watch the child. If a nap makes the evening calmer and the night easier, keep it. If a nap makes bedtime a long struggle, try shortening it, moving it earlier, or dropping it for a few days and seeing what happens. A short, quiet rest in the afternoon, even without sleep, can also help a child who is tired but not sleepy, because it gives the body a break without stealing sleep from the night. That quiet rest is often forgotten, and it is a useful tool for families.
I want to add a word about fear and bad dreams, because they are a normal part of childhood sleep, and they are often handled badly. A child who wakes from a bad dream needs comfort, not a lecture about how dreams are not real. The dream felt real to the child, and the fear is real, even if the monster is not. A calm voice, a short cuddle, and a return to bed usually help far more than a long discussion in the middle of the night. It also helps to keep the evening calm, to avoid scary stories or frightening programmes before bed, and to give the child a soft toy or a night light if that helps them feel safe. A child who feels safe at bedtime will fall asleep faster and wake less often than a child who goes to bed feeling afraid. That safety is not a luxury. It is part of sleep, and it is one of the simplest gifts a parent can give.
Finally, I want to finish with patience, because children’s sleep changes slowly, and families often give up too soon. A new bedtime, a new routine, or a new rule about screens will feel strange for the first few nights. The child may resist, may get up again and again, or may lie awake and call out. That is normal, and it does not mean the change is wrong. It means the child’s body clock needs time to learn the new pattern, and that learning usually takes a week or two of steady repetition. I would ask any family trying to improve a child’s sleep to give the change two full weeks, to keep the wake-up time steady even on weekends, and to keep a simple note of how mornings feel. By the end of those two weeks, the pattern is usually clear. Mornings become easier, school becomes easier, and the child becomes calmer in the evening. Those are not dramatic changes, and they do not happen overnight, but they are real, and they are worth the patience. A child who sleeps well is not just a child who is less tired. They are a child who can learn better, play better, and enjoy their family more, and that is a change that matters far beyond the bedroom.
My last thought is a simple one, and I will put it plainly. Find the range for your child’s age, work out the bedtime from the wake-up time, keep that bedtime fairly regular, make the last hour calm, keep screens out of the bedroom, and give the child daylight and movement during the day. If your child wakes up tired every day for weeks, despite sleeping enough hours, or if they snore loudly, wake gasping, or fall asleep in the daytime without meaning to, talk to a doctor, because those signs deserve a proper check. For most children, though, the answer is not complicated and it is not expensive. It is a regular bedtime, enough hours, and a calm evening, repeated night after night, with a little patience and a little kindness. Sleep is not a luxury for a child. It is part of growing up, part of learning, and part of staying well, and when you give it its proper place, the rest of the child’s day often feels steadier, happier, and easier for everyone in the family.
I also think it is worth remembering that a child’s sleep is not a test for the parent, and a tired morning is not a failure. Every family has late nights, ill children, and evenings that do not go as planned, and those nights do not undo months of steady sleep. What matters is the pattern over weeks, not the single worst night. If most nights are steady, most mornings will be easier, and the occasional late night can be forgiven without worry. A parent who keeps that longer view will be kinder to themselves and kinder to their child, and kindness, in the end, is what makes a bedtime routine last.
Frequently Asked Questions
Can “how much sleep do kids need by age” feel different for children and adults?
Yes, because children and adults are at different stages of growth. Children need far more sleep than adults, since their bodies are growing and their brains are learning at a fast pace. A toddler needs eleven to fourteen hours, a school child needs nine to twelve, and an adult needs seven to nine. Age is always part of the picture, which is why the same number of hours can be right for an adult and far too little for a child.
What makes “how much sleep do kids need by age” easier to understand in plain words?
It becomes easier when you walk through the ages in order and see the pattern. A baby sleeps most of the day, a toddler sleeps about half the day including a nap, a school child sleeps nine to twelve hours at night, and a teenager sleeps eight to ten. The amount falls slowly as the child grows, because the body needs less sleep once the fastest growth has passed. That simple picture explains the idea better than any chart.
In simple words, what does “how much sleep do kids need by age” mean?
It means the usual amount of sleep that leaves a child of a certain age feeling rested, alert, and ready to learn and play. For a toddler that is eleven to fourteen hours a day including a nap, for a preschool child ten to thirteen hours, and for a school child nine to twelve hours at night. The exact number inside the range differs from child to child, and the test is always the same: does the child wake up rested and stay alert through the day?
Why do people ask “how much sleep do kids need by age” so often?
Parents ask because children change so fast, and the right amount of sleep changes with them. A bedtime that suited a child at three may leave the same child tired at seven, when school starts earlier. Parents also ask because tiredness in a child can look like bad behaviour, poor school work, or frequent illness, and they want to know whether sleep is part of the problem. It is a common question because sleep affects learning, mood, growth, and health at every age.
Does “how much sleep do kids need by age” change with age or daily routine?
Yes, it changes with age, and it can change with routine too. As a child grows, the need falls slowly, and naps gradually disappear. A change in routine, such as starting school, a holiday, or an illness, can also shift sleep for a while. A regular bedtime and a regular wake-up time help the child’s body clock settle, which is why a steady pattern matters more than any single night.
When is “how much sleep do kids need by age” most noticeable?
It is most noticeable in the morning, when a child who has slept too little is hard to wake, moves slowly, and eats little breakfast. It also shows up in the afternoon, when a tired child becomes tearful or hyperactive, and at school, where a tired child finds it hard to concentrate. On days after a good night’s sleep, the same child is usually calmer, quicker, and more interested in the day.
Sources
- NHS — general health information: https://www.nhs.uk/
- World Health Organization — health topics: https://www.who.int/
- Centers for Disease Control and Prevention — health information: https://www.cdc.gov/
- Mayo Clinic — general health information: https://www.mayoclinic.org/
- Healthline — general health information: https://www.healthline.com/
