How Many Hours Do Newborns Sleep? The Sourced Numbers, Week 1 to 12

Fourteen to seventeen, and the bands either side

The 14 to 17 hour range is a recommendation for healthy babies, not a measurement of what every baby does. The 2015 panel paper behind it, Hirshkowitz and colleagues in Sleep Health, says so directly: durations outside the recommended range may be appropriate, though deviating far from the normal range is rare. In other words, a baby who sleeps 13 hours or 18 hours is not automatically outside normal. The panel's range is the middle of the road, not its edges.

The Sleep Foundation's newborn guide, medically reviewed by a board-certified pediatrician, gives those edges: from birth to three months, it says, sleep needs can range from as few as 11 hours to as many as 19 hours a day.

One body is conspicuously absent from the newborn row. The American Academy of Sleep Medicine's consensus statement, the figure most pediatric sleep content leans on for older babies, starts at four months and makes no recommendation below that. Cleveland Clinic explains why in plain terms: research has not linked a particular amount of sleep under four months to specific health benefits, so there are no official recommendations for that age, and "normal" is all across the board. If you see an AASM citation next to a newborn sleep total, the citation is wrong.

Here is how the published figures line up side by side. They do not disagree so much as describe the same wide territory from slightly different angles.

Why count in 24-hour blocks at all?

Because a newborn does not have a night yet. The AAP notes that babies do not have regular sleep cycles until about 4 months, and Stanford Medicine Children's Health adds that many newborns have their days and nights confused, sleeping through the afternoon and staying alert at 2am. Adding up "night sleep" for a three-week-old is measuring something that has not formed.

This is also why comparing your baby's nights to a friend's is so misleading in the early weeks. Two babies can both sit at 15 hours a day, one with a long afternoon block and the other with a long block after midnight, and both are inside the same published range. The total is the same. Only the timing differs, and timing is the part that arrives later.

One stretch: thirty minutes to three hours

If the 24-hour total answers the question on paper, the length of a single stretch is what you actually live with. The published figures here are short. The AAP says newborns may only sleep 1 or 2 hours at a time, and the Sleep Foundation repeats the same one-to-two-hour figure. Cleveland Clinic gives a wider band for the first two months: about 30 minutes to three hours at a time, in many short bursts between feedings.

Put those together and the arithmetic of a newborn day becomes clearer. Sixteen hours of sleep made of one-to-two-hour pieces means roughly eight to sixteen separate sleeps in a day, each bracketed by waking. That is why a newborn can sleep two-thirds of the day and you can still feel you have not seen a single long stretch of rest. You have not. Neither has the baby. The sleep is real, just fragmented by design.

The reason, according to Cleveland Clinic, is mostly plumbing: newborns wake a lot because their stomachs are tiny and they get hungry not long after a feed. Which leads straight to the question parents most often ask about duration.

How long does a newborn sleep between feeds?

Usually less than the gap between feeds, and that distinction trips up almost everyone. Feeding intervals are normally counted from the start of one feed to the start of the next. The AAP's feeding guidance says so explicitly for breastfed babies. So if a feed starts at 1:00, takes 40 minutes, and the next one starts at 3:00, the baby's sleep in between is well under two hours, even though the feeds are "two hours apart".

Here is what the sources publish about the gap itself:

• Breastfed newborns usually nurse about every 2 hours, start to start, which works out to 10–12 sessions in 24 hours, and the spacing widens only slowly (AAP).
• Bottle-fed newborns most often eat every 2 to 3 hours, with 8 feeds generally recommended as the minimum in 24 hours; by the end of the first month many are feeding about every 3 to 4 hours (AAP).
• Cleveland Clinic gives every two to three hours for breastfeeding and typically three to four hours for bottle-feeding (Cleveland Clinic).
• Stanford says that in most cases a baby will wake and be ready to eat at least every 3 hours, and that how often depends on what they are fed and their age (Stanford Medicine Children's Health).
• The Sleep Foundation puts breastfed babies at around every two hours and formula-fed babies closer to three (Sleep Foundation).

A week-old baby, a month-old baby, a twelve-week-old baby

Ask how many hours do newborns sleep at one week and again at twelve weeks and you get the same answer, because the NSF range of 14 to 17 hours covers the whole span from birth to three months. A one-week-old and a twelve-week-old sit in the same recommendation. What changes is the shape: how far apart the feeds get, and when a longer night stretch starts to show up.

The table below sticks to what the sources say at each point. It does not give clock times, because no authoritative source publishes them for this age, and it does not give a separate hour total for each week, because the sources do not split the 0–3 month range that finely. Anyone who tells you a week-six baby needs exactly 15.5 hours is guessing. For a fuller picture of how each fortnight feels, the newborn sleep schedule by week page goes through it in order.

The night stretch nobody can average for you

One of the searches that brought people here asks for the average time an infant spends sleeping through the night. I looked, and no authoritative source publishes an average. What they publish are definitions and rough ages, and they do not quite agree with each other.

Cleveland Clinic defines sleeping through the night as five to six hours at a stretch without feeding, says most babies reach it by six months, and says some start sleeping longer around four months. Stanford defines it as 6 to 8 hours and says most babies do not get there until at least 3 months, while some do not until closer to a year. The NHS says that between three and six months some babies may sleep for 5 to 8 hours or longer at night, but not all.

So for a newborn, the honest answer is that a long night stretch is not expected yet, and the definition of a long stretch itself ranges from five to eight hours depending on who you read. If you want the full picture of when it tends to arrive, the when do babies sleep through the night page covers the evidence in more detail.

Sleep windows and wake windows

People often search for newborn "sleep windows" when they mean one of two things. If you mean how long a stretch of sleep lasts, that is the 30-minutes-to-three-hours territory above. If you mean how long a baby can stay awake between sleeps, that is a wake window, and it is worth knowing that no consensus body publishes those as a clinical standard. They are commonly published guidance, useful as a rough guide and nothing more.

Stanford's advice is to read the baby rather than the clock. Its listed signs of sleep readiness are rubbing eyes, yawning, looking away and fussing. For the commonly quoted ranges and how to use them gently, see wake windows for a 1 month old.

When the total is worth a phone call

A newborn who sleeps a lot is usually just a newborn. The time to ring the pediatrician is when sleep starts crowding out feeding, or when the pattern changes suddenly. I am not a clinician, so here is what the medical sources themselves say, in their words as closely as I can keep them.

Cleveland Clinic says that if you are worried your baby is sleeping too much, you should talk to your pediatrician. It notes that a baby who sleeps too much may have a cold or fever, and that, less commonly, too much sleepiness can be a sign of a medical condition that needs treatment. The AAP's feeding page says babies born even a little early can be sleepy and may not take in enough in the early weeks, and that a baby having trouble gaining weight should not go too long between feeds, even if that means waking them, and to talk with the pediatrician about it.

On waking a baby to feed, the sources deliberately avoid a universal rule. Stanford says to talk with your healthcare provider about whether you need to wake your baby for feedings, and Cleveland Clinic describes differing expert approaches before sending parents to the pediatrician for a decision based on the baby's size, growth, feeding, wet nappies and stools. Stanford also flags change as a signal: a baby who has been sleeping consistently and suddenly wakes far more often may have a problem, or may be in a growth spurt.

The most urgent line comes from the Sleep Foundation: newborns are known to be hard to wake, but if a baby is unresponsive despite your best efforts to wake them, seek medical attention. That one is not a phone-call-in-the-morning situation.

Outside those flags, the answer to how many hours do newborns sleep is a range to stop worrying inside, not a target to hit. If you want to see where the newborn months fit in the bigger picture, the schedules hub gathers every age in one place.

How much a newborn sleeps is a separate question from where and how they sleep, and the second one is not something this site advises on. For that, go to the source: the American Academy of Pediatrics' guide to keeping a sleeping baby safe and the NICHD's Safe to Sleep campaign.