A 4-month-old typically drinks 24 to 32 ounces of breast milk or formula per day, spread across five to six feedings. The exact amount varies by baby, but a reliable rule of thumb is about 2.5 ounces of formula per pound of body weight per day. So a 14-pound baby would need roughly 35 ounces, though most babies cap out around 32 ounces in 24 hours.
Formula-Fed Babies at 4 Months
By 4 months, most formula-fed babies have settled into a predictable rhythm of feeding every 3 to 4 hours. Each bottle is typically 4 to 6 ounces, adding up to around 24 to 32 ounces across the day. The upper limit matters: babies generally shouldn’t average more than about 32 ounces of formula in 24 hours. If your baby consistently drains bottles and seems unsatisfied at that volume, it’s worth talking to your pediatrician rather than simply adding more formula.
That 2.5-ounces-per-pound calculation from the American Academy of Pediatrics gives you a personalized starting point. Weigh your baby at a recent checkup, multiply by 2.5, and divide by the number of feedings to get a rough per-bottle target. But babies aren’t calculators. Some feedings they’ll take 3 ounces, others 6. What matters is the overall daily intake and steady weight gain, not hitting an exact number every time.
Breastfed Babies at 4 Months
Exclusively breastfed babies between 1 and 6 months old consume about 750 milliliters (roughly 25 ounces) per day on average. What’s interesting about breastfed babies is that their daily volume stays relatively stable during this entire window, even as they grow. Instead of drinking more milk over time, the composition of breast milk changes to meet their evolving nutritional needs.
Because you can’t measure ounces at the breast, frequency is your best guide. Most breastfed 4-month-olds nurse 8 to 12 times in 24 hours, roughly every 2 to 4 hours. Some babies are efficient feeders who finish in 10 minutes per side, while others take 20 or more. Both patterns are normal as long as your baby is gaining weight and producing enough wet diapers (at least six per day at this age).
If you’re pumping and bottle-feeding breast milk, a good starting point is 3 to 4 ounces per bottle, offered 6 to 8 times a day.
How to Tell If Your Baby Is Getting Enough
At 4 months, your baby gives you clear physical signals about hunger and fullness. Hunger looks like hands going to the mouth, head turning toward the breast or bottle, and lip smacking or puckering. You may also notice clenched fists. Crying is a late hunger cue, meaning your baby has been hungry for a while before reaching that point.
Fullness is equally readable. A satisfied baby will close their mouth, turn their head away from the breast or bottle, and visibly relax their hands. These cues are more reliable than any chart. Babies naturally regulate their intake when you let them lead. Pushing a baby to finish a bottle after they’ve turned away can override those internal signals over time.
Night Feedings at 4 Months
Most 4-month-olds can stretch 5 or more hours between feedings at night, which means you may be down to one or two night feeds. If your baby is waking to eat more than twice per night at this age, the extra wakings may be driven by habit or comfort rather than genuine hunger. This is especially likely if your baby is gaining weight well and eating plenty during the day.
That said, some babies genuinely need those nighttime calories, particularly smaller babies or those going through a growth spurt. The 4-month mark is also when many babies hit a well-known sleep regression that can temporarily disrupt feeding patterns. If nighttime feedings suddenly increase after weeks of improvement, it’s usually a phase that resolves within a few weeks.
What About Solid Foods?
Four months is the earliest that solid foods should even be considered, and most guidelines recommend waiting until about 6 months. The American Academy of Pediatrics and the Dietary Guidelines for Americans both point to 6 months as the target. Introducing solids before 4 months is not recommended under any circumstances.
If your pediatrician gives the green light to start closer to 4 months, your baby needs to show specific readiness signs first: sitting up with support, controlling their head and neck steadily, opening their mouth when food is offered, and swallowing food rather than pushing it out with their tongue. They should also be reaching for objects and bringing things to their mouth. If your baby isn’t doing most of these things yet, they’re telling you they’re not ready, and breast milk or formula alone is providing everything they need.
Even once solids begin, they’re a complement to milk, not a replacement. At 4 months, the vast majority of your baby’s calories and nutrition should still come from breast milk or formula.
When Intake Changes Suddenly
Growth spurts are common around 4 months and can temporarily increase your baby’s appetite by 20 to 30 percent. During a spurt, your baby may want to eat every 2 hours for a few days before settling back into their usual rhythm. This is normal and doesn’t mean your milk supply is low or that formula isn’t satisfying them.
On the flip side, some 4-month-olds become easily distracted during feedings. They’ll pop off the breast or push away the bottle to look at a sibling, a pet, or a ceiling fan. If your baby seems to be eating less because of distractibility, try feeding in a quiet, dimly lit room. These distracted feedings are a developmental milestone, not a feeding problem. Your baby is simply becoming more aware of the world around them.