Hannah is three and a half. At nursery she slept for two hours after lunch; since September she has been going to preschool, and after the afternoon rest she cannot fall asleep until ten at night. On days without a nap she cries about everything at six in the evening and falls asleep at supper. In the morning she has to be woken at seven. Her parents wonder how much a three-year-old should actually sleep, and whether the nap still helps her or is starting to get in the way.
A three-year-old’s sleep changes faster than you might think: the nap gets shorter or disappears, and preschool brings a new daily rhythm. This article brings together the recommendations of children’s sleep experts, shows how to build a daily plan from them, and suggests when sleep problems are worth discussing with a doctor.
How much should a 3-year-old sleep?
A three-year-old needs 10 to 13 hours of sleep a day, counting night-time sleep and naps together. That is what the 2016 recommendations of the American Academy of Sleep Medicine say for children aged 3–5, endorsed by the American Academy of Pediatrics, and the 2019 WHO guidelines say the same for children aged 3–4. WHO adds that sleep should be of good quality, with regular sleep and wake-up times, and may include a nap.
The 10–13 hour range is wide because children differ in how much sleep they need. One three-year-old is well rested after ten and a half hours at night without a nap; another needs eleven hours at night and an hour during the day. A better test than the number on the clock is how the child functions during the day: whether they wake up on their own, have energy and do not fall apart from tiredness in the evening.
Sleep recommendations in one table
| Age | Recommended sleep per 24 hours | Source | Notes |
|---|---|---|---|
| 1–2 years | 11–14 hours | AASM 2016, WHO 2019 | Including naps |
| 3–5 years (AASM) | 10–13 hours | AASM 2016, endorsed by AAP | Including naps |
| 3–4 years (WHO) | 10–13 hours | WHO 2019 | Good-quality sleep, may include a nap, regular times |
| 6–12 years | 9–12 hours | AASM 2016 | Usually without a nap |
The table shows that the third birthday sits on the border between two ranges. A child just past their third birthday often still needs sleep closer to the upper limit, and a four-year-old closer to the middle. The change does not happen overnight, but gradually over a year or two.
Why sleep matters so much for a three-year-old
For a young child, sleep is not a break from development but part of it. The American Academy of Pediatrics writes that children who get enough sleep have a healthier immune system and better memory, behaviour and mental health. Regular lack of sleep, by contrast, is linked to irritability, difficulty concentrating and health problems. In its 2019 guidelines, WHO treats sleep together with movement and time spent sitting as one whole: a healthy day for a child means plenty of active play, little sitting in front of a screen and enough good-quality sleep.
This matters especially for a three-year-old, because so much is happening at once at this age: the child is learning to hold conversations, to play with other children, to cope with emotions, and often to settle into preschool. All of these skills take energy and attention, and both depend on whether the child is well rested. Parents often notice that the same three-year-old happily shares toys and calmly accepts a “no” after a good night, but explodes over nothing after a short one.
That is why sleep hygiene — the set of everyday habits that support good sleep — deserves to be taken as seriously as healthy eating. The AAP encourages families to make sleep a priority for everyone, with adults setting an example through their own daily rhythm.
Does a 3-year-old need a nap?
Many three-year-olds still need a nap, but not all. The WHO recommendations for children aged 3–4 speak of 10–13 hours of sleep that may include a nap — in other words, a nap is one way for a child to get enough sleep, not a compulsory part of the day. What counts is the total sleep over 24 hours and how the child feels.
A three-year-old who still needs a nap usually shows it with an afternoon crisis on days without one: crying over small things, overexcitement, falling asleep in the car or at supper. A nap that is starting to get in the way shows up as a long time falling asleep in the evening, when after sleeping in the day the child lies in bed for an hour or more, and as waking too early.
If the nap pushes evening bedtime very late and the child has to get up at a fixed time in the morning, the nap can be shortened or moved earlier. When the nap disappears, a quiet time after lunch helps instead: lying down with a book, listening to music, quiet play in the room. During the transition a slightly earlier bedtime in the evening usually helps too.
What time should a three-year-old go to bed?
There is no single time at which a three-year-old should go to bed — it depends on when they have to get up and whether they sleep during the day. The simplest way is to count backwards: if the child gets up at seven and needs about eleven hours of night-time sleep, they should be asleep by eight in the evening, which means starting the bedtime routine around seven. If they nap, night-time sleep can be correspondingly shorter.
Regularity matters more than the time itself. The American Academy of Pediatrics recommends the same waking time on weekdays and at weekends, and regular times for meals, naps and play. A three-year-old who sleeps until nine on Saturday and cannot fall asleep until ten on Sunday evening is tired on Monday morning, even if in total they slept long enough.
If the child currently goes to bed too late, it is better to shift the time gradually, by a quarter of an hour every few days, than by an hour all at once. Morning light helps too: the AAP advises exposing children to bright light when it is time to get up, as this helps them wake up and organises the rhythm of the day.
A sample daily plan for a three-year-old
The plan below is an example, not a standard. It shows how to fit 10–13 hours of sleep into the day of a child who goes to preschool.
| Time | Child who naps | Child who doesn’t nap |
|---|---|---|
| Wake-up | 7:00 | 7:00 |
| Preschool, outdoor movement | 8:00–12:30 | 8:00–12:30 |
| Lunch | 12:30 | 12:30 |
| Nap or rest | 13:00–14:15 (sleep) | 13:00–13:45 (quiet, book) |
| Afternoon, play, movement | until 18:30 | until 18:00 |
| Supper and routine | 18:30–19:45 | 18:00–19:15 |
| Asleep | 20:00 | 19:30 |
| Sleep per 24 hours | about 12 h 15 min | about 11 h 30 min |
The plan for a child without a nap has an earlier bedtime, because after a day without sleep tiredness comes sooner. With or without a nap, the day should include plenty of movement: the WHO recommendations for children aged 3–4 call for at least 180 minutes of physical activity a day. The AAP lists an active day with movement and fresh air among the ways to support a child’s healthy sleep.
The bedtime routine
A bedtime routine is a fixed sequence of the same activities before sleep that tells the child: the day is ending. For young children the AAP recommends a simple pattern: brush, book, bed. It is good for the routine to be short, about half an hour, and one that can be repeated anywhere: at grandma’s, on holiday, while travelling.
Elements that help with falling asleep:
- dimmed light — the AAP advises dimming the lights before bedtime,
- no screens — the AAP recommends turning off all screens at least an hour before bed and keeping them out of the child’s bedroom,
- the same order — bath, pyjamas, teeth, book, cuddle, lights out,
- a calm conversation — about what was good in the day, without settling disputes,
- calming movement — a firm hug, wrapping in a blanket, a back rub, if the child likes it; more ideas are in the article on sensory integration exercises at home,
- a comfortable bedroom — darkened, quiet, not too warm; the AAP gives 68–72°F (20–22°C) for children.
In Montessori education the child’s bedroom is arranged to the child’s scale: a low bed they can get in and out of on their own, a few books within reach, few stimuli. How to set up such a room is described in the article on the Montessori child’s room.
A three-year-old who won’t go to bed
The AAP lists resisting going to bed and stalling among the most common sleep problems in children. A three-year-old is just discovering that they can influence the world, and bedtime is the ideal moment to test it: one more story, one more drink, one more trip to the toilet, one more hug.
A few rules help:
- Advance notice. Ten minutes before the routine starts, give a warning: “One more tower of blocks and then it’s bath time.”
- Small choices. The child chooses the pyjamas or the book, but does not decide whether to go to bed.
- A fixed number. One book, one drink, one hug — agreed in advance and repeated every evening.
- Everything before lights out. Drink, toilet and favourite cuddly toy are sorted before the light goes off, so they do not later become reasons to get out of bed.
- A calm adult. The more the parent gets upset, the more interesting the bedtime battle becomes for the child.
If a three-year-old lies in bed for a long time unable to fall asleep, it is worth checking whether they nap too long during the day or go to bed too early for their sleep needs.
Night waking
Brief awakenings at night happen to many children; they become a problem when the child cannot get back to sleep on their own. A three-year-old who falls asleep only with a parent beside them often looks for the same situation at night, because after waking the conditions are different from those at bedtime. The AAP lists night-time awakenings among the most common sleep problems in children and notes that most sleep problems can be treated well.
A consistent, calm response helps: settle the child briefly, take them back to bed, do not start games or conversations. Sometimes, after a period of calm nights, a three-year-old begins to wake more often — during settling in at preschool, after the birth of a sibling, after a house move, during illness. This usually passes once everyday life calms down. How settling in works and why it is often uneven is described in the article on preschool settling-in.
How can you tell a three-year-old isn’t getting enough sleep?
A sleep-deprived three-year-old rarely looks sleepy. More often they are irritable, tearful, overexcited, find it hard to concentrate and fly into a rage over small things. The AAP lists irritability and difficulty concentrating among the effects of regular sleep deprivation in children, and according to the AAP children who get enough sleep have better memory, behaviour and immunity.
Other signs include falling asleep in the car or pushchair at unusual times, difficulty waking in the morning, and a clear difference in behaviour between days when the child slept longer and days when they slept less. It is also worth asking the preschool teachers how the child functions during the day — the AAP encourages parents to have this conversation, because sleep problems may show up during the day as well.
When to talk to a doctor
Parents handle most of a three-year-old’s sleep problems themselves by changing the daily rhythm and the routine. There are, however, signs worth discussing with the paediatrician. The AAP lists snoring, sleep apnoea, loud or heavy breathing, difficulty falling asleep and night-time awakenings among the most common sleep problems in children, and encourages parents to talk to the doctor about their child’s sleep — especially when problems persist despite a steady routine.
Before the visit it helps to keep a sleep diary for two weeks: when the child fell asleep, whether they woke at night, when they got up, whether they napped and how they felt. The AAP notes that the doctor may ask for such a log — bringing it along from the start shortens the road to a solution.
Sleep at preschool and the after-lunch rest
In many preschools younger children have time to rest or sleep after lunch. For a three-year-old who still needs a nap, this is an important part of the day. For a child who no longer sleeps during the day, a long rest time can push back evening bedtime. It is worth talking to the teachers about this: tell them how the child sleeps at home and ask what rest time looks like in the group.
In the first weeks of preschool many children are more tired than usual in the evening, because a new place, new children and a new rhythm are more tiring than a day at home. During this period it is worth putting a three-year-old to bed a little earlier and cutting back on afternoon activities.
In a mixed-age group, typical of Montessori preschools, children’s sleep needs can vary a great deal, so it is worth asking how the preschool organises rest for younger and older children. More about what to expect from a three-year-old in different areas of development is in the article on what a 3-year-old should be able to do.
FAQ — parents’ questions about a three-year-old’s sleep
How many hours should a 3-year-old sleep at night? The AASM and WHO recommendations speak of 10–13 hours per 24 hours including naps. A three-year-old without a nap therefore needs all of that sleep at night, and a child who naps correspondingly less.
Does a 3-year-old have to sleep during the day? No. According to WHO, a three-year-old’s sleep may include a nap, but does not have to. If a child without a nap functions well until the evening and sleeps well at night, a nap is not needed.
What time should a 3-year-old go to bed? It depends on wake-up time. With a 7:00 wake-up and no nap, falling asleep around 19:30–20:00 gives 11–11.5 hours of sleep, which is the middle of the recommended range. Regularity matters more than the exact time, including at weekends.
Can a three-year-old watch a cartoon before bed? The AAP recommends turning off screens at least an hour before bed and keeping them out of the child’s bedroom. Reading together works better than a cartoon and can become a fixed part of the routine.
My three-year-old snores. Should I be worried? The AAP lists snoring, pauses in breathing during sleep and loud or heavy breathing among sleep problems worth discussing with the paediatrician. Before the visit, note how often they happen.
Can a three-year-old sleep with their parents? That is a family decision. If co-sleeping suits everyone and everyone is well rested, there is no reason to change it. If parents want the child to sleep alone, a gradual transition and a steady routine in the child’s own bed help.
Final thoughts
A three-year-old needs 10–13 hours of sleep a day, and whether they fit it all into the night or include a nap depends on the child. What helps most is a regular rhythm: a fixed wake-up time, plenty of movement during the day, an evening without screens and a short, predictable routine. When something is worrying, a sleep diary and a conversation with the paediatrician usually show quickly what to change. And when the daily plan changes, for example at the start of preschool, it is worth giving the child a few weeks to get used to the new rhythm.
If you would like to see what a day looks like for three-year-olds in a mixed-age group, see the page on the Montessori preschool.