Newborns need 16 to 17 hours of sleep per day, and that number gradually decreases as babies grow. By 4 to 12 months, most babies sleep 12 to 16 hours total, and toddlers between 1 and 2 years old need 11 to 14 hours. These totals include both nighttime sleep and naps.
Sleep Needs by Age
The range shifts meaningfully during the first two years. Here’s what to expect across each stage:
- Newborn to 3 months: 16 to 17 hours per day, spread across many short stretches. Newborns don’t distinguish between day and night, so sleep comes in bursts of 45 minutes to a few hours around the clock.
- 4 to 12 months: 12 to 16 hours per day, with longer nighttime stretches and two to three daytime naps. By 6 months, many babies can sleep a longer block at night, though waking is still normal.
- 1 to 2 years: 11 to 14 hours per day, typically with one or two naps. Most toddlers transition to a single midday nap somewhere between 13 and 18 months.
These are 24-hour totals. A 10-month-old sleeping 11 hours at night plus two naps adding up to 2.5 hours falls squarely within the healthy range.
Why Newborn Sleep Looks So Chaotic
Newborns spend roughly half their sleep time in active (REM) sleep, which is the lighter, more easily disrupted phase. Their sleep cycles are also much shorter than adults’, running about 45 to 60 minutes per cycle compared to 90 minutes for grown-ups. That’s why a newborn can seem wide awake just 40 minutes after falling asleep.
The other factor is biology. Babies don’t produce meaningful amounts of melatonin, the hormone that drives the sleep-wake cycle, until around 9 weeks of age. Before that point, their internal clock simply isn’t set yet, which explains why newborns sleep and wake at seemingly random intervals regardless of whether it’s day or night. Once melatonin production kicks in, you’ll start to notice longer sleep stretches at night and more wakefulness during the day.
Wake Windows That Actually Work
Wake windows are the stretches of time your baby can comfortably stay awake between sleep periods. Pushing past them leads to overtiredness, which paradoxically makes it harder to fall asleep. Staying within them helps your baby nap more easily and sleep better at night.
- 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 ranges are wide because every baby is different, and wake windows tend to be shorter in the morning and longer before bedtime. If your 6-month-old seems fine after 2 hours awake in the morning but needs 3.5 hours before the last nap, that’s a common pattern, not a problem.
How Naps Change Over the First Year
Young babies take many short naps, and the number decreases as they get older. Most babies follow a general pattern: four or five naps in the early months, dropping to three naps around 5 to 6 months, then two naps around 8 to 9 months. The transition from two naps to one usually happens between 13 and 18 months.
Nap transitions are rarely smooth. You’ll typically see a week or two where the old schedule stops working (your baby fights the third nap, for instance) before the new pattern settles in. During that adjustment, bedtime may need to shift earlier temporarily to prevent a sleep deficit.
Night Waking Is Normal
Babies wake at night. Their shorter sleep cycles and lighter sleep phases mean they surface to near-wakefulness far more often than adults do. Many babies who are described as “sleeping through the night” are actually waking briefly and falling back asleep on their own.
Breastfed babies tend to wake more frequently at night than formula-fed babies. A systematic review of the research confirmed that breastfed infants have a higher number of nighttime awakenings, and breastfeeding mothers feed their babies more often overnight. This is a normal pattern driven by the faster digestion of breast milk, not a sign that something is wrong. It also doesn’t mean breastfed babies are getting less total sleep. They simply distribute it differently.
Sleep Regressions and What Causes Them
Just when you think you’ve figured out a rhythm, your baby’s sleep may fall apart for a stretch. These regressions commonly happen around 4 months, 6 months, 8 months, 12 months, and 18 months. They’re temporary, typically lasting two to six weeks.
The 4-month regression is often the most dramatic because it reflects a permanent shift in how your baby’s brain organizes sleep cycles. Before this point, babies fall directly into deep sleep. Afterward, they cycle through lighter phases first, just like adults do, which means more opportunities to wake up. The later regressions are usually tied to developmental milestones: physical growth and increased activity, separation anxiety, teething discomfort, or the mental leap that comes with learning to walk or talk. A 12-month-old who was sleeping well might suddenly resist bedtime because their brain is buzzing with new skills.
The most helpful thing during a regression is to stay consistent with whatever sleep routines you already have. The disruption passes.
Spotting Tired Cues Before Overtiredness
Babies give physical signals when they’re ready for sleep, and catching them early makes a big difference. In newborns, the signs include pulling at ears, yawning, clenching fists, fluttering eyelids, staring into space, and making jerky movements with their arms and legs. Some newborns arch their backs or start frowning. Sucking on fingers can also signal tiredness, and it’s actually a healthy sign that your baby is attempting to self-soothe.
In older babies and toddlers, the cues shift to clinginess, crying, clumsiness, demanding attention, losing interest in toys, getting fussy about food, or (counterintuitively) becoming more active and wired. That last one trips up a lot of parents. A baby who suddenly seems full of energy right before bedtime is often overtired, not under-tired. If you’re seeing those signs, you’ve likely passed the ideal sleep window, and the next one will be harder to catch.
Safe Sleep Basics
The American Academy of Pediatrics updated its safe sleep guidelines in 2022, and the core recommendations are straightforward. Place your baby on their back for every sleep, including naps. Use a firm, flat mattress in a safety-approved crib or bassinet with only a fitted sheet. Keep the sleep area free of blankets, pillows, bumper pads, and stuffed animals.
Room-sharing (not bed-sharing) is recommended for at least the first 6 months. Keep your baby’s sleep space in the same room where you sleep but on a separate surface. Avoid letting your baby overheat: if their chest feels hot or they’re sweating, they’re too warm. Offering a pacifier at nap time and bedtime may also be protective, though if you’re breastfeeding, it’s fine to wait until nursing is well established before introducing one.