How Many Hours Should a Newborn Sleep?
How many hours should a newborn sleep? The short answer: 14 to 17 hours in a 24-hour period, according to the National Sleep Foundation (Hirshkowitz et al., Sleep Health, 2015). The American Academy of Sleep Medicine recommends 12 to 16 hours for infants aged 4 to 12 months (Paruthi et al., JCSM, 2016). If that sounds like a lot, that is because it is. The problem is not the total. The problem is that those hours arrive in unpredictable chunks of 45 minutes to 3 hours, scattered across day and night in a pattern that barely qualifies as a pattern.
Here is what the numbers actually look like, why your baby probably does not match any chart exactly, and when to call your pediatrician.
Newborn sleep by age
These ranges reflect consensus guidelines and real-world variability. Your baby will land somewhere inside them, not on a single number.
| Age | Total daily sleep | Nighttime sleep | Daytime naps | Typical nap length |
|---|---|---|---|---|
| 0-2 weeks | 16-18 hours | 8-9 hours (in fragments) | 4-5 naps | 30 min to 3 hours |
| 2-4 weeks | 15-17 hours | 8-9 hours | 4-5 naps | 30 min to 2.5 hours |
| 1-2 months | 14-17 hours | 8-10 hours | 4-5 naps | 30 min to 2 hours |
| 2-3 months | 14-16 hours | 9-10 hours | 3-4 naps | 30 min to 2 hours |
| 3-4 months | 14-16 hours | 9-11 hours | 3-4 naps | 30 min to 2 hours |
| 4-6 months | 12-15 hours | 10-11 hours | 2-3 naps | 45 min to 2 hours |
Nighttime sleep gradually stretches while nap count drops from 5 to 2-3 over six months. Total sleep decreases slowly, but the shift from daytime to nighttime is the bigger change.
Why newborns vary so much
Two healthy newborns born on the same day can differ by 3 or more hours of daily sleep and both be perfectly fine. Feeding method matters: breastfed babies tend to wake more frequently because breast milk digests faster than formula. Temperament, birth weight, gestational age, and household noise all play a role.
The AAP and AASM guidelines describe what is typical for healthy infants, not what your specific baby must do. If your baby is feeding well, gaining weight, and alert during wake windows, their sleep total is almost certainly fine.
The day versus night split
Newborns do not know the difference between day and night. Their circadian rhythm takes roughly 3 to 4 months to develop. In the early weeks, sleep is distributed almost evenly across 24 hours, which is why “sleeping through the night” is a myth for the first 8 to 12 weeks.
By 6 to 8 weeks, most babies start consolidating more sleep at night. You will notice one longer stretch (3 to 4 hours, then gradually 5 to 6) emerging in the first half of the night. You can support it with light exposure during the day and dim, quiet environments at night, but you cannot force it. The eat-play-sleep routine helps give that consolidation a framework once your baby can stay awake after feeds.
If you are logging nighttime sleep, Nubo’s Live Activities put the sleep timer on your lock screen so you can check duration without unlocking your phone. Midnight Ember keeps the screen in amber tones when you do glance at it at 3am, so the light does not sabotage your own ability to fall back asleep.
”My baby seems to sleep all day”
This is common in the first two weeks and almost always normal. Newborns are recovering from birth, and their brains are doing extraordinary developmental work during sleep. A baby who sleeps 18 or even 19 hours in the first week is not unusual. Feed them on schedule (every 2-3 hours for breastfed babies, every 3-4 hours for formula-fed), wake them if needed, and watch for adequate wet diapers and weight gain. If your baby is hard to rouse for feeds, excessively limp when you do wake them, or not producing wet diapers as expected, call your pediatrician. Otherwise, enjoy the quiet while it lasts.
”My baby barely sleeps”
This one is harder, because it feels like a crisis when you are living it. A baby who seems to sleep only 10 to 12 hours total can make you question everything. First, check your math. Sleep deprivation warps time perception, and a 40-minute nap you did not notice still counts. Second, look at the wake windows. If your baby is alert and content during awake time and falls asleep without extreme difficulty, they may simply be at the low end of normal.
If you keep a paper log, you are manually totaling nap lengths at the end of the day. Most apps do the math for you. A physical tracker like Nubo does too, since every tap syncs to the app where daily totals update automatically. The app shows total sleep in the last 24 hours. You do not have to do the mental math at 3am. Sometimes seeing the real number is the reassurance you need, because it is usually higher than what exhausted guessing suggests.
If total sleep is consistently below 12 hours in a 24-hour period and your baby seems irritable or difficult to console, bring those numbers to your pediatrician. Data makes that conversation faster and more productive.
When to worry
Most sleep variations are normal. A few patterns warrant a call to your doctor:
- Consistently below 12 hours total after the first two weeks, especially paired with fussiness or poor feeding.
- Sudden change in sleep patterns lasting more than a few days, coinciding with feeding refusal or lethargy.
- Difficulty waking for feeds. A sleepy baby who cannot be roused to eat needs medical attention.
- Loud, labored breathing during sleep. Occasional snoring is usually fine; consistent stridor or retractions are not.
If your baby is gaining weight, hitting wake windows within a normal range, and producing enough wet diapers, their sleep total is very likely normal.
Frequently asked questions
Can a newborn sleep too much?
Rarely. In the first two weeks, some newborns sleep up to 18 to 20 hours. This is normal as long as you are waking them for regular feeds and they are producing adequate wet and dirty diapers. After the first month, if your baby consistently sleeps more than 17 hours and is difficult to wake, mention it at your next pediatrician visit.
When do babies start sleeping longer stretches at night?
Most babies begin consolidating nighttime sleep around 6 to 8 weeks, with one stretch of 3 to 5 hours. By 3 to 4 months, many babies can manage a 5 to 6 hour stretch. “Sleeping through the night” (defined as a 6-hour stretch, not 8) typically happens between 3 and 6 months, though there is wide variation.
Should I track every nap to hit the daily total?
Tracking helps you see the real number instead of guessing, but you do not need to obsess over hitting an exact total each day. A few days of logs will show you your baby’s natural pattern. If you are tracking sleep, feeds, and diapers together, you will have the complete picture for your own confidence and for your pediatrician.
When the 3am math of “is that enough sleep?” starts spinning in your head, let the number be waiting for you instead. Nubo tracks total sleep automatically, so you can check the real total and get back to sleep yourself.