How Much Sleep Does a Baby Need by Age? The Complete Chart (0–3 Years)

Why do babies need so much sleep — and why does it change?

How much sleep does a baby need? It's one of the first questions new parents ask — and it keeps changing as your little one grows. The short answer: a lot, and it varies from one child to the next. Baby sleep is not simply a miniature version of adult sleep. Sleep is vital for babies — it's when the brain consolidates learning, builds neural connections, and releases growth hormone. A newborn baby spends most of its sleep time in REM (active) sleep, the stage linked to brain maturation and memory.

As babies grow, their sleep cycles lengthen, their circadian rhythm develops, and they gradually shift more total sleep to nighttime. Understanding this normal sleep development helps parents use charts as guides, not report cards. Every child is different — the numbers below are recommended ranges, not rigid targets.

Baby sleep needs by age: the complete sleep chart (0–3 years)

The following recommendations come from the American Academy of Pediatrics (AAP) and the National Sleep Foundation (NSF), derived from systematic reviews of the literature (AAP, 2016; Hirshkowitz et al., 2015). All figures represent total sleep per 24 hours, naps and nighttime sleep combined. The recommended amount of sleep at each age includes daytime sleep — cutting naps to boost night hours typically backfires.

Newborns (0–3 months)

Recommended: 14–17 hours per day (11–19 hours is acceptable).

Newborns sleep about 16 to 17 hours per 24-hour day — though this varies widely. Newborn babies have no working circadian rhythm yet. Their internal biological clock is still developing, so there's no reliable difference between night and day. A newborn typically sleeps in short bursts of 1 to 2 hours at a time, sometimes up to 4 hours at a time, spread across the full day and night.

A large part of a newborn's sleep time is active (REM) sleep — you may see your baby twitch, grimace, or make sounds. This is normal newborn sleep behavior during rapid eye movement sleep, reflecting intense brain development.

Safe sleep note: always place your newborn on their back on a firm, flat surface for every sleep. A sleep sack instead of loose blankets, and a pacifier at sleep time, are both associated with lower SIDS risk. Swaddle your baby snugly for the first 8 weeks if they find it calming — stop once they show signs of rolling.

3–6 months

Recommended: 13–15 hours per day.

By 3 to 4 months, the circadian rhythm begins to emerge and newborns sleep less during the day and more at night. Sleep patterns start to organize: babies typically sleep in longer stretches at night (4–6 hours) and take 3–4 naps per day. The infant sleep architecture shifts — less REM, more quiet deep sleep at the start of the night.

This is also when the 4-month sleep regression often disrupts sleep patterns. Around 4 months, babies transition to more mature sleep cycles (like adults, cycling through light and deep stages), causing more frequent night waking for several weeks.

→ 4-Month Sleep Regression: What's Happening and How to Cope

6–12 months

Recommended: 12–15 hours per day.

Infant sleep consolidates significantly in the second half of the first year. A 6-month-old baby is physiologically capable of sleeping 5–8 hours at night without feeding. Most babies transition from 3 naps to 2 naps between 6 and 9 months of age. A longitudinal study of 493 children found that nighttime sleep duration increases fastest between 6 and 12 months, parallel to nervous system maturation (Iglowstein et al., 2003).

Baby sleep needs drop slightly toward 12 hours per day as nighttime sleep grows longer. Sleep habits formed in this window — bedtime routine, consistent sleep location, ability to self-settle — set the foundation for healthy sleep through toddlerhood.

Bedtime ideally falls between 7 and 8:30 pm. A late bedtime can lead to overtiredness, which raises cortisol levels and makes it harder to go back to sleep after normal night wakings.

→ What Time Should Baby Go to Bed by Age?

12–24 months

Recommended: 11–14 hours per day.

The nap transition from two to one typically happens between 12 and 18 months, sometimes as late as 18 months. This transition period can take several bumpy weeks. A regular sleep schedule with one afternoon nap (1.5–2.5 hours) plus 10–12 hours of nighttime sleep covers the total for most toddlers.

A toddler sleeping 10 hours at night plus a solid afternoon nap is within the normal range. The quality of sleep matters too: a child who cycles through deep and light sleep smoothly benefits more from 11 hours than one who gets 13 fragmented hours (Paruthi et al., 2016).

2–3 years

Recommended: 11–14 hours per day.

Most children this age keep one afternoon nap, though some resist it by 2.5 years. A child who skips naps but sleeps 11–12 hours at night is likely meeting their sleep needs. Even for children who don't nap, a quiet rest period supports the late-afternoon energy dip and promotes better sleep at night.

Nap schedule by age: how many naps and when?

Naps are not extras — they form a critical part of normal sleep in infants and toddlers. Daytime sleep contributes as much as nighttime sleep to learning consolidation and physical recovery. Cutting naps too early to try to get your baby to sleep longer at night usually makes nighttime sleep worse, not better.

The wake window is your baby's ideal time awake between sleeps. Put your baby down too late past their wake window and overtiredness kicks in — cortisol rises and getting your baby to sleep becomes a battle. Watch for tired cues (yawning, eye rubbing, a glazed look) and start the sleep routine before the meltdown.

What the science says — AAP and NSF official recommendations

Baby sleep is one of the most studied areas in pediatric medicine. Major medical organizations base their recommendations on comprehensive systematic reviews.

In 2016, the American Academy of Pediatrics officially endorsed the recommendations of the American Academy of Sleep Medicine, derived from a review of 864 studies (AAP, 2016):

• Infants 4–12 months: 12–16 hours per day (including naps)
• Toddlers 1–2 years: 11–14 hours per day
• Preschoolers 3–5 years: 10–13 hours per day

The National Sleep Foundation updated its sleep health recommendations in 2015, defining both "recommended" and "may be appropriate" ranges that reflect real-world variability between children (Hirshkowitz et al., 2015). A systematic review of 34 studies published in Sleep Medicine Reviews confirms that sleep duration varies significantly between children of the same age, and that children at the lower end of recommended ranges show normal development (Galland et al., 2012).

Research published in the Journal of Clinical Sleep Medicine further emphasizes that sleep quality — whether your baby cycles smoothly through deep and light sleep phases — matters alongside total hours (Paruthi et al., 2016).

Is my baby getting enough sleep? Signs to watch for

A baby sleeping slightly below the midpoint of the recommended range may still have healthy sleep. The better question is: how does your baby behave?

Signs of enough sleep — healthy baby sleep:

• Wakes up happy and alert after naps and in the morning.
• Has energy and curiosity during normal wake windows.
• Falls asleep within 15–20 minutes at sleep time without prolonged distress.
• Grows and develops on track.

Signs your baby may need more sleep:

• Chronically irritable and hard to soothe, especially in the late afternoon.
• Falls asleep instantly in the car or stroller — a sign of sleep deprivation, not relaxation.
• Very early morning waking (paradoxically a sign of poor sleep, not enough sleep).
• Difficulty going to sleep at bedtime despite obvious tiredness — overtiredness causes a cortisol "second wind."

If you're unsure whether your child's sleep patterns are normal, keep a sleep diary for 1–2 weeks: note sleep and wake times, nap duration, and mood. A sleep diary makes it easy to spot trends and gives your pediatrician useful data.

When to consult your pediatrician: if your baby snores regularly, has breathing pauses during sleep, wakes up during the night very frequently past 9 months without improvement, or shows developmental concerns alongside sleep problems. These can indicate a sleep disorder needing evaluation.

How to help your baby get enough sleep and build good sleep habits

Respect wake windows. Putting your baby down too late past their wake window floods their system with cortisol, making it harder — not easier — to fall asleep. Help your baby develop a regular sleep schedule by watching tired cues and acting on them.

Establish healthy sleep habits with a consistent bedtime routine. Babies thrive on predictability. A repeated sequence of calming activities — bath, feeding, dimmed lights, swaddle or sleep sack for younger babies, lullaby — signals the brain to release melatonin and wind down. Consistent sleep cues help your child get ready for sleep before they're even in the crib.

→ Baby Bedtime Routine: Building a Calming Wind-Down That Works

Help your baby learn to self-settle. A baby who can fall asleep independently at bedtime applies that same skill when they wake up during the night between sleep cycles. This is the single most impactful change for extending baby sleep stretches and achieving optimal sleep totals. It doesn't require cry-it-out — gradual, gentle methods work.

→ How to Teach Baby to Self-Settle: Gentle Methods That Work

Optimize the sleep environment. Keep the room cool (65–68°F / 18–20°C), dark, and quiet — or use consistent white noise to mask sounds that could cause your baby to wake up during the night. Put your baby down drowsy but awake when possible. A sleep sack instead of loose blankets keeps your baby safe and warm without the smothering risk.

FAQ

How much sleep does a newborn need? Newborns sleep about 16 to 17 hours per day on average, spread across the 24-hour period. The recommended range is 14 to 17 hours, though 11 to 19 hours is considered acceptable. Newborn babies have no circadian rhythm yet — they sleep in short bursts of 2 hours at a time, both day and night. Not sleeping through the night is entirely normal for a newborn.

When do babies start sleeping through the night? Most healthy, full-term babies can manage a 5–6 hour uninterrupted stretch by 6 months of age. Many reach this milestone between 4 and 6 months. "Sleeping through the night" in pediatric terms means 5–8 consecutive hours, not a full adult night. Individual infant sleep development varies widely — some babies sleep longer stretches earlier, others later.

How many naps should a 6-month-old take? Most 6-month-old babies take 2 to 3 naps per day, totaling about 2.5 to 4 hours of daytime sleep. Watch for wake windows of approximately 2 to 2.5 hours between naps — this is a more reliable cue than the clock for when your baby needs sleep.

My baby sleeps less than the chart — should I worry? Not necessarily. Every child is different, and sleep needs vary significantly. If your baby wakes up happy, has energy during wake windows, and is developing normally, a slight dip below the midpoint is usually not a concern. Behavioral signs of sleep deprivation — chronic irritability, instant sleep in the car, very early waking — matter more than the number on a chart.

Do naps count toward total sleep hours? Yes, always. Every figure on the baby sleep chart — 14 hours for a newborn, 12 hours for a 9-month-old — includes both nighttime sleep and all daytime naps combined. Daytime sleep contributes as much to neurological recovery and learning consolidation as night sleep. Cutting naps to try to get your baby to sleep longer at night usually reduces total sleep rather than shifting it.

Can the Mothair device help my baby sleep better? Yes. The Mothair wellness device recreates the gentle sounds and vibrations of the womb environment, supporting healthy sleep by helping babies transition between sleep cycles without fully waking. This can help babies reach their recommended daily sleep total and establish consistent sleep patterns. Mothair is a wellness device and does not replace medical advice — consult your pediatrician for any concerns about your child's sleep.

Disclaimer: Mothair is a perinatal wellness device. The information in this article is for informational and educational purposes only. It does not replace medical advice. Consult your pediatrician or physician for any questions about your baby's health or sleep.