How Much Sleep Does My Baby Need? Age-by-Age Guide

The quick answer: how much sleep by age

Before we get into the why, here's the what. The American Academy of Pediatrics (AAP) and the American Academy of Sleep Medicine (AASM) publish consensus recommendations on total daily sleep — including naps — for infants and toddlers. These are the numbers your pediatrician is working from.

These are total sleep figures — nighttime plus all naps. A 6-month-old who sleeps 11 hours at night and takes two 90-minute naps is getting roughly 14 hours total. That's on the high end of normal, and it's fine. These ranges exist because babies are individuals. The question isn't whether your baby hits a number — it's whether they're rested.

Newborns (0–3 months): sleep is not predictable — and that's normal

Newborn sleep is fundamentally different from all the sleep your baby will do later. Newborns have no circadian rhythm. Melatonin production is minimal. Their sleep is driven by hunger and comfort, not by time of day. A newborn who sleeps 18 hours is not unusual. Neither is one who seems to sleep 13 hours but wakes every 45 minutes around the clock.

In the first 4–6 weeks, the goal isn't scheduling — it's surviving. Feed on demand, watch for sleepy cues (eye rubbing, yawning, staring blankly, becoming quieter), and try to put your newborn down drowsy. That last part won't always work, and that's fine. The drowsy-but-awake window is a skill your baby learns over months, not days.

By weeks 6–8, many babies start to show a slightly longer stretch at night — sometimes 3–4 hours. This is a neurological development (melatonin onset), not something you can train in. Don't compare your newborn to anyone else's newborn. Some start consolidating at 6 weeks; some at 12 weeks. Both are normal.

What you can do during the newborn phase: expose your baby to natural light during the day, keep nighttime feeds quiet and low-stimulation (dim lights, no talking, no playtime), and begin establishing a loose before-bed sequence. These are the foundations of a sleep-supportive environment — they help, but they don't override biology.

3–6 months: the transition begins — including the 4-month regression

Around 3–4 months, the brain undergoes a major shift. Sleep architecture matures from simple newborn patterns (active and quiet sleep) into the cyclical structure adults have — light sleep, deep sleep, REM, and brief wake-ups between cycles. This is a developmental milestone, not a regression in the negative sense. But it's why babies who were sleeping in decent stretches suddenly start waking every 45 minutes.

If you're in this phase right now, you're probably exhausted and searching this article at 3am. That's what the 4-month sleep regression does to families. The regression is permanent — your baby's sleep structure has changed — but how your baby handles the brief wake-ups between cycles is a skill that can be learned.

By 5–6 months, most babies are ready for 3 naps: a morning nap, an afternoon nap, and a short late-afternoon catnap (typically 30–45 minutes). The catnap exists to bridge the gap to bedtime without overtiredness. It's not a problem if it's short. Its job is just to take the edge off.

This window — 5 to 6 months — is when sleep training becomes developmentally appropriate. The AAP recommends 4–6 months as the earliest window. If you're considering it, the research is clear that it's safe. The method matters less than the consistency.

6–9 months: two solid naps, night sleep consolidating

Between 6 and 8 months, most babies drop from 3 naps to 2. The late-afternoon catnap goes first. You'll know it's time when your baby starts resisting the third nap entirely, or when it's pushing bedtime later than 8pm consistently for two weeks or more.

On a 2-nap schedule, a typical 7-month-old might look like this: wake at 7am, morning nap at 9am (60–90 min), awake by 10:30am, afternoon nap at 1pm (90 min), awake by 2:30pm, bedtime around 7–7:30pm. Total: 11–12 hours at night plus 2.5–3 hours of daytime sleep.

Bedtime is often earlier than parents expect. A tired 6-month-old needs to be asleep by 7–7:30pm. Keeping them up later doesn't lead to sleeping in — it leads to overtiredness and earlier waking. If your baby is waking at 5am, the counterintuitive fix is often moving bedtime earlier by 30 minutes, not later.

9–12 months: stability, then another nap transition

The 9–12 month window is often the most stable sleep period many parents experience. Two naps, consistent bedtime, longer nighttime stretches. If you've done any sleep training, this is usually when the results are most visible — babies who've learned to self-soothe are handling the brief wakings between sleep cycles without needing you.

Toward 12 months, some babies start resisting the morning nap. Others hold on to two naps until 15–18 months. There's real variability here. The push to one nap is one of the most disruptive transitions of the first two years. Don't rush it — the signs are consistent: resisting the morning nap for 2+ weeks, and afternoon naps going long enough to push bedtime past 8:30pm.

12–24 months: the one-nap era

The transition from two naps to one is a months-long process. Many families attempt it at 12 months because daycares enforce one-nap schedules — which is fine as long as you protect the nap quality. A single midday nap for a 14-month-old should be 2–3 hours. If it's consistently under 60 minutes, something is wrong with the timing or the environment.

On one nap, toddler bedtimes typically move earlier — often 6:30–7pm rather than 7:30pm. This surprises many parents. The overtiredness from dropping a nap means the child needs to bank more nighttime hours. Nighttime sleep for a 12–18-month-old should be 11–12 hours.

Night waking at this age is rarely a sleep need issue — the child has the sleep capacity. It's almost always a sleep association issue: the child can't get back to sleep without the same conditions that were present at bedtime (a parent, nursing, a specific soothing ritual). If you're experiencing this, the root cause is the fall-asleep conditions at bedtime, not middle-of-the-night behavior.

Signs your baby isn't getting enough sleep

Sleep deprivation in infants looks different than in adults. It doesn't always look like lethargy — often it looks like hyperactivity, emotional dysregulation, or difficulty settling. Watch for:

• Falling asleep in the car or stroller almost immediately — a well-rested baby can tolerate a short car ride without crashing
• Meltdowns in the hour before naptime or bedtime — not personality, this is usually overtiredness
• Short naps consistently under 45 minutes — if the baby wakes but isn't refreshed, the nap isn't doing its job
• Waking before 6am consistently — early rising is usually a sign of insufficient sleep, not a "morning person" personality
• Increased clinginess and fussiness with no medical cause — chronic sleep deprivation manifests as behavioral regression
• Difficulty falling asleep at naptimes despite obvious tiredness — the overtiredness paradox: too tired to sleep

How to actually build a baby sleep schedule

The numbers above are targets. Building a schedule starts with the anchor points: wake time and bedtime. Pick a consistent morning wake time (6:30–7am works for most families) and work forward using the age-appropriate wake windows. The nap times fall out of the wake windows — you're not scheduling naps, you're scheduling wake time and letting biology do the rest.

Don't chase the clock. The cues tell you more than the clock does. A baby who is rubbing eyes at 8:45am needs to go down, even if the schedule says 9am. A baby who is still bright-eyed at 9:30am isn't ready, even if the schedule says 9am. Use the schedule as a framework and cues as the real-time adjustment.

And then stay consistent. Sleep schedules improve over 5–10 days of consistency, not overnight. The mistake most parents make is trying something for 3 days, seeing inconsistent results, and abandoning it. The 3-day mark is usually the worst — most schedules break through to better sleep by day 5–7.

What comes next

Sleep schedules change approximately every 2–3 months in the first year as nap counts drop and wake windows stretch. The biggest transitions: the 4-month regression (sleep architecture shift), dropping from 3 to 2 naps (around 6–8 months), and the 2-to-1 nap transition (12–18 months). Each one temporarily disrupts schedules that were working.

The parents who navigate these transitions with the least stress are the ones who understand why they happen — not just what to do. That's what the CribNotes guides cover: the developmental framework behind each transition, with age-specific schedules and night-by-night protocols for the hard parts.