Babies need between 11 and 19 hours of sleep per day, depending on their age. That range narrows as they grow: a newborn may sleep up to 19 hours in scattered bursts, while a one-year-old typically sleeps 11 to 14 hours with most of it happening at night. Here’s what to expect at each stage and how to tell if your baby is getting enough.
Sleep Totals by Age
The amount of sleep your baby needs shifts significantly over the first year, and so does the pattern. Newborns don’t distinguish between day and night. They wake and sleep in short cycles around the clock. By about three to six months, a more recognizable rhythm starts to form, with longer stretches at night and defined naps during the day.
Birth to 3 months: 11 to 19 hours total. Sleep comes in short bursts throughout the day and night, with no consistent pattern yet.
3 to 6 months: 12 to 15 hours total. Babies take two to three naps a day (up to two hours each) and can sleep six to eight hours straight at night.
6 to 12 months: 11 to 16 hours total. Daytime naps account for two to four hours, and nighttime sleep stretches to 10 to 14 hours.
After 12 months: 11 to 14 hours total. Most toddlers drop to one nap lasting one to two hours and sleep 10 to 12 hours at night.
These are ranges, not targets. A baby who sleeps 12 hours at four months old is just as normal as one who sleeps 15. What matters more than hitting a specific number is whether your baby seems rested, alert during wake times, and growing on track.
How the Internal Clock Develops
Newborns don’t have a circadian rhythm. They haven’t yet developed the internal 24-hour clock that tells adults when to feel sleepy and when to feel awake. This is why the first few months feel so chaotic: your baby genuinely cannot tell the difference between day and night.
You can help this clock develop faster by exposing your baby to bright or sunny spaces during the day and keeping things dim and quiet at night. When you need to feed overnight, skip the talking and playing. A calm, boring environment teaches the brain that nighttime is for sleep, not stimulation. Most babies begin showing a more predictable day/night pattern somewhere between three and four months.
Wake Windows and Nap Timing
A wake window is the stretch of time your baby can comfortably stay awake between sleep periods. Putting a baby down too early leads to fussing, but waiting too long leads to overtiredness, which paradoxically makes it harder for them to fall asleep. Knowing your baby’s typical wake window helps you time naps before they hit that wall.
- Birth to 1 month: 30 minutes to 1 hour
- 1 to 3 months: 1 to 2 hours
- 3 to 4 months: 1.25 to 2.5 hours
- 5 to 7 months: 2 to 4 hours
- 7 to 10 months: 2.5 to 4.5 hours
- 10 to 12 months: 3 to 6 hours
These windows expand gradually as the brain matures. A one-month-old who’s been awake for 90 minutes is likely already overtired. A ten-month-old can comfortably handle three to four hours between naps, sometimes more. Watch the clock, but also watch your baby. Their behavior will tell you more than any chart.
Signs Your Baby Is Overtired
Tired babies give clear signals: rubbing eyes, yawning, turning away from stimulation, getting fussy. Overtired babies are a different story. When a baby stays awake past the point of comfortable tiredness, the body releases stress hormones (cortisol and adrenaline) that actually amp them up instead of calming them down. This is why an exhausted baby can seem wired, fighting sleep even though they desperately need it.
An overtired baby often cries louder and more frantically than usual. Some babies sweat noticeably when overtired, because rising cortisol levels increase perspiration. Others become hyperactive or inconsolable. If you’re seeing these signs regularly, your baby may need to go down for naps a little earlier. Catching the tired window before it becomes the overtired window makes a real difference in how quickly and peacefully they fall asleep.
Sleep Regressions
Just when you think you’ve figured out a rhythm, your baby’s sleep may suddenly fall apart. Sleep regressions are periods when a baby who had been sleeping consistently starts waking more often, fighting naps, or crying at bedtime. Most babies experience at least one regression in their first year, and some go through several.
Regressions are less about hitting a specific age and more about what’s happening developmentally. Common triggers include growth spurts (which increase hunger and cause extra nighttime feedings), reaching new physical milestones like rolling over or pulling up, teething pain, illness, and separation anxiety, which tends to peak around nine months. Even changes in routine, like travel or starting daycare, can disrupt sleep temporarily.
The reassuring part: regressions are temporary. They typically last a few days to a few weeks. Sticking with your normal sleep routine, even when it doesn’t seem to be working, helps your baby return to their pattern once the disruption passes.
Sleeping Through the Night
This is often the real question behind the search. Between three and six months, many babies become capable of sleeping six to eight hours straight at night. That doesn’t mean all of them will. “Sleeping through the night” in infant sleep terms means a stretch of six to eight uninterrupted hours, not the eight to ten hours an adult expects for themselves.
By six to twelve months, nighttime sleep stretches to 10 to 14 hours, though some babies still wake for a feeding or need brief comfort. The progression isn’t linear. A baby who slept eight hours at four months may start waking again at five months due to a growth spurt or developmental leap. This is normal and not a sign that something has gone wrong.
Safe Sleep Basics
How much your baby sleeps matters, but so does where and how. The American Academy of Pediatrics recommends a firm, flat mattress in a safety-approved crib, covered only by a fitted sheet. No blankets, pillows, bumper pads, or soft toys in the sleep area. These guidelines apply for every sleep, including naps. Babies should be placed on their backs, and the sleep surface should never be inclined or angled.