Most 4-month-olds can sleep a stretch of about 5 to 8 hours at night, though the total nighttime sleep (including wake-ups and feedings) typically falls between 10 and 12 hours. The wide range is normal. Some babies this age surprise their parents with a solid 8-hour block, while others still wake every 4 to 5 hours to eat. Both scenarios are within the expected window for this age.
Total Sleep at 4 Months
Babies between 4 and 7 months old generally need 12 to 16 hours of sleep per 24-hour period. That total includes nighttime sleep plus at least two daytime naps. Most of the sleep shifts toward nighttime around this age, with naps filling in the remaining hours. A typical pattern might look like 10 to 11 hours overnight (with a feeding or two mixed in) and 3 to 4 hours of naps spread across the day.
By 6 months, most babies sleep 9 or more consecutive hours at night with only brief awakenings. At 4 months, you’re in the transition toward that longer stretch, so expect some inconsistency from night to night.
Why Night Feeds Still Matter
A 4-month-old’s stomach has grown enough that many babies can go 5 or more hours between feedings at night. Formula-fed babies who weigh more than 12 pounds often drop the middle-of-the-night feeding entirely around this age because they take in more calories during the day. Breastfed babies sometimes take a bit longer to reach that point since breast milk digests faster.
One to two nighttime feedings is still normal at 4 months. If your baby wakes more than twice a night to eat, it may be worth looking at whether daytime feedings are providing enough calories. Babies who eat well during the day are better equipped to sleep longer stretches at night.
The 4-Month Sleep Regression
If your baby was sleeping well and suddenly isn’t, you’re likely in the middle of the 4-month sleep regression. This is one of the most common reasons parents search for sleep information at this age, and it has a biological explanation.
Around 4 months, a baby’s brain undergoes a major shift in how it cycles through sleep stages. Newborns have only two sleep stages. At around 3 to 4 months, the brain transitions to the more mature pattern adults use, cycling through light sleep, deep sleep, and brief partial awakenings between cycles. The problem is that babies haven’t yet learned to put themselves back to sleep during those between-cycle wake-ups. So a baby who previously slept a long stretch may now wake every 45 minutes to 2 hours, confused and crying.
This regression typically lasts 2 to 6 weeks. It isn’t a step backward. It’s the brain reorganizing into a permanent, more adult-like sleep architecture. The disruption is temporary, even though it doesn’t feel that way at 3 a.m.
When Babies Can Start Self-Soothing
Before about 3 months, babies don’t produce their own melatonin or regulate sleep cycles independently. Their ability to distinguish day from night is limited. By 4 months, that biological machinery comes online, which is why many pediatric sleep specialists consider 4 months (and roughly 14 pounds) the earliest reasonable point for sleep training if parents choose to try it.
At 14 pounds, most babies have the metabolic reserves to go a longer stretch without eating, which means a wake-up is more likely about the sleep cycle transition than actual hunger. That distinction matters because it tells you whether your baby needs a feeding or just hasn’t figured out how to bridge sleep cycles on their own yet.
Sleep training is entirely optional and comes in many forms, from gradual methods where you slowly reduce your presence in the room to approaches where you check in at timed intervals. No single method works for every family, and plenty of babies learn to sleep longer stretches without any formal training at all.
How Daytime Naps Affect the Night
It sounds counterintuitive, but babies who nap well during the day tend to sleep better at night. An overtired baby produces more stress hormones, which makes it harder to fall asleep and stay asleep. At 4 months, most babies do well with at least two naps (often three), typically around 9 a.m. and 1 p.m., with a possible late-afternoon catnap.
Let naps run their natural course unless your baby starts having trouble falling asleep at bedtime. If bedtime becomes a battle, shortening or dropping that last afternoon nap is usually the first adjustment to try. Keeping wake windows to about 1.5 to 2 hours between naps prevents the overtired spiral that leads to worse nighttime sleep.
Safe Sleep Setup
As your baby starts sleeping longer stretches, the sleep environment matters more simply because they’re spending more uninterrupted time in it. The current recommendations from the American Academy of Pediatrics are straightforward: place your baby on their back, in their own sleep space (a crib, bassinet, or portable play yard), on a firm, flat mattress with a fitted sheet. Nothing else goes in the sleep space. No blankets, pillows, stuffed animals, or bumper pads.
Avoid letting your baby sleep in a swing, car seat (unless actively traveling), or on a couch or armchair. These surfaces increase the risk of positional breathing problems, especially during those longer sleep stretches you’re working toward. If your baby falls asleep in a car seat or swing, move them to a flat surface when you can.