How Much Sleep Does a Baby Need? Hours by Age

The short answer, by age

How much sleep a baby needs falls steadily as they grow. A newborn needs roughly 14 to 17 hours across a full day; by 3 to 5 months that eases to about 14 to 16 hours, by 6 to 8 months to 13.5 to 14.5 hours, and by the first birthday to around 13 to 14 hours. Toddlers settle into 11 to 14 hours depending on age. Every one of those figures is a total for the whole 24 hours, night sleep and naps combined, which is the single most common thing parents miscount.

Those numbers come from the sleep-duration consensus published by the American Academy of Sleep Medicine and echoed by the American Academy of Pediatrics. They're ranges, not targets, and the width of each range is doing real work: two perfectly healthy babies the same age can genuinely need an hour or more apart. The chart below gives you the map; the rest of this guide helps you find where your own baby sits on it.

The full sleep-needs chart

This is the reference. Total sleep is the whole day; daytime sleep is the portion that comes from naps; nap count is how many naps typically make up that daytime sleep at each stage.

If you take one thing from the table, make it the shape of it: total sleep barely moves in the first year, but daytime sleep collapses from 7 to 9 hours down to 2 to 3. Babies aren't sleeping much less overall early on; they're steadily moving sleep out of the day and into the night.

Why night sleep and daytime sleep aren't interchangeable

It's tempting to treat sleep as one bucket, as if a long nap could simply make up for a short night. It doesn't quite work that way. Night sleep and daytime sleep do different jobs and follow different rhythms, and the balance between them is what the chart's two columns are really tracking.

Overnight sleep is where the longest, most consolidated stretches happen, driven by the body's circadian rhythm and its highest overnight melatonin. Naps break up the day so that sleep pressure, the drive to sleep that builds during awake time, never climbs so high that a baby tips into overtiredness before bedtime. That's why cutting naps to "bank" more night sleep backfires: an overtired baby doesn't sleep longer at night, they sleep worse. The daytime column shrinks as babies grow precisely because they can tolerate longer awake stretches without that overtired tip, not because naps stop mattering.

What each stage looks like

Newborn (0-2 months)

Sleep is spread almost evenly around the clock in short bursts, because a newborn's circadian rhythm hasn't matured and hunger drives the schedule more than any clock does. Wake windows are tiny, roughly 45 to 60 minutes, and 4 to 5 naps that blur into the night are completely normal. There's no "schedule" to enforce yet; the job is feeding, safe sleep, and following your baby's cues.

3 to 5 months

Sleep starts to organize. Total sleep is still high at 14 to 16 hours, but more of it consolidates overnight, naps settle toward 3 to 4, and wake windows stretch to around 60 to 90 minutes early in this band and longer toward the end. The 4-month change to more adult-like sleep cycles often shows up here as more frequent surfacing between cycles.

6 to 12 months

The daytime picture simplifies. Most babies move to 2 to 3 naps and then to a solid 2-nap day, with 13 to 14.5 hours total and 2 to 3.5 hours of that from naps. Wake windows are now 2 to 3.5 hours. Many babies are capable of long overnight stretches by this stage, though whether they actually take them depends on more than the numbers.

Toddler (1 to 3 years)

Total sleep eases toward 11 to 14 hours and, at some point between roughly 13 and 18 months, the second nap drops away, leaving one longer midday nap. By the third year some children begin dropping the nap entirely. Wake windows are now measured in the 3-to-6-hour range.

How to tell if your baby is getting enough

The chart tells you the average; your baby tells you the truth. The most reliable signal isn't the number at all, it's how your baby is during their waking hours. A well-rested baby generally wakes content rather than crying, has awake windows that are alert and settled rather than fried and fussy, and falls asleep within a reasonable window without a prolonged battle.

The clearest sign that sleep is falling short is a cluster of overtired behaviors: falling asleep the instant they're in a moving car or stroller, fighting sleep hard and then crashing suddenly, very early morning waking that nothing seems to fix, and short, crying-heavy naps. A baby landing a little under the chart but happy, alert, and growing well is almost always fine. A baby landing inside the chart but showing several of those overtired signs may still need more, or better-timed, sleep.

Too much, too little, and normal variation

The ranges are wide on purpose, and healthy babies scatter across them. Landing slightly outside the range on a given day, or even most days, isn't automatically a problem. A baby may sleep well above the range during a growth spurt, while fighting an illness, or after an unusually stimulating day, and that's the body doing exactly what it should.

What's worth a closer look is a persistent, marked departure from the range rather than a mild or occasional one. Consistently sleeping well under the range alongside chronic overtiredness, or a sudden lasting jump in sleepiness in a baby who was previously typical, or a newborn who is very hard to rouse for feeds, are the situations to raise with your pediatrician. Most of the time, though, "is this normal?" has the same answer: yes, within a wide band, and your baby's daytime mood is the tiebreaker.

If your baby is coming up short

When the weekly average genuinely sits below the range and your baby seems overtired, the fix is usually about timing rather than forcing more hours directly.

1. Anchor the morning. A consistent wake time steadies the whole day's rhythm and makes naps and bedtime land predictably.
2. Match wake windows to age. Overtiredness from windows that run too long is the most common reason a baby under-sleeps despite an early enough bedtime.
3. Protect the naps you have. Guard daytime sleep rather than trimming it to "earn" night sleep; the daytime total on the chart exists for a reason.
4. Move bedtime earlier before later. For an overtired baby, an earlier bedtime very often lengthens night sleep rather than shortening it.

Give any single change five to seven days before deciding whether it worked. Daily sleep totals are noisy from night to night; the trend over a week is the signal.

Key takeaways

• Total sleep need falls with age: about 14 to 17 hours for newborns, 13 to 14.5 hours in the second half of the first year, and 11 to 14 hours for toddlers, always counting naps and night together.
• Across the first year, total sleep barely drops but daytime sleep shrinks dramatically as sleep consolidates into the night.
• Night sleep and naps aren't interchangeable; cutting naps to gain night sleep usually backfires by creating overtiredness.
• The best measure of "enough" is daytime behavior, not the clock: content wake-ups and settled awake windows matter more than hitting an exact number.
• Wide ranges are normal; a persistent, marked departure paired with overtired signs or feeding or growth concerns is what's worth raising with your pediatrician.

Sources

1. American Academy of Sleep Medicine — consensus recommendations on sleep duration for children: aasm.org
2. American Academy of Pediatrics, HealthyChildren.org — guidance on infant and toddler sleep needs: healthychildren.org
3. Sleep Foundation — how much sleep children need by age: sleepfoundation.org
4. Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) — research on infant sleep development: nichd.nih.gov
5. Zero to Three — resources on infant and toddler sleep: zerotothree.org