A 4-month-old typically drinks 4 to 6 ounces per feeding, with most babies consuming around 24 to 32 ounces total over a 24-hour period. That range depends on whether your baby is breastfed or formula-fed, how often they eat, and their individual size and appetite.
Formula-Fed Babies at 4 Months
Most formula-fed 4-month-olds eat every 3 to 4 hours, which works out to about 5 to 7 feedings per day. Each bottle is typically 4 to 6 ounces. Some larger or hungrier babies will take closer to 7 ounces at a time, but that’s roughly the upper limit of what a baby this age can comfortably hold. Between 3 and 6 months, an infant’s stomach capacity is about 6 to 7 ounces, so pushing past that tends to cause spit-up or discomfort rather than extra nutrition.
A useful benchmark: babies taking in about 32 ounces or more of formula per day don’t need a separate vitamin D supplement, since formula is fortified. If your baby consistently drinks less than that, ask your pediatrician whether a supplement makes sense.
Breastfed Babies at 4 Months
Breastfed babies eat more frequently, typically 8 to 12 times in 24 hours, with feedings spaced every 2 to 4 hours. Because breast milk is digested faster than formula, shorter intervals between feedings are completely normal. Each nursing session delivers roughly 2 to 4 ounces, though this varies depending on how long your baby feeds and your milk supply at that moment.
If you’re pumping and bottle-feeding breast milk, offering 3 to 4 ounces per bottle is a reasonable starting point. You can always offer a little more if your baby still seems hungry after finishing.
How to Tell If Your Baby Is Getting Enough
Counting ounces is helpful, but your baby’s hunger and fullness cues are the most reliable guide. Signs your baby is hungry include fists moving to their mouth, head turning as if looking for the breast or bottle, sucking on hands, lip smacking, and becoming more alert and active. Feeding at the first signs of hunger works better than waiting for crying, which is a late hunger signal and can make feeding harder.
When your baby is full, the signals are equally clear. They’ll release the nipple or pull away from the bottle, turn their head away, relax their body, and open their fists. Resist the urge to encourage them to finish a bottle if they’re showing these signs. Babies are good at self-regulating intake, and pushing extra ounces can lead to overfeeding and discomfort.
Steady weight gain and 6 or more wet diapers a day are the best indicators that your baby is eating enough overall.
What a Typical Day Looks Like
A formula-fed 4-month-old’s day might include five bottles of 5 ounces each, totaling 25 ounces, or four bottles of 6 ounces plus one smaller feeding, totaling around 26 ounces. Some babies prefer fewer, larger bottles while others eat smaller amounts more often. Both patterns are normal as long as the total falls in a reasonable range.
A breastfed baby’s schedule often looks different. You might nurse 8 or 9 times during the day with a couple of feeds overnight. The intervals won’t always be evenly spaced, and cluster feeding (several feedings bunched together, usually in the evening) is still common at this age.
Night Feedings at 4 Months
Most 4-month-olds still wake to eat at least once or twice during the night. By this age, babies can often stretch 5 or more hours between feedings overnight, which means you may get one longer stretch of sleep before a feed. If your baby is waking more than twice a night to eat, that pattern may be driven more by habit or comfort than genuine hunger, though every baby is different.
Night feeds still count toward total daily intake. A baby who takes a full 5-ounce bottle at 3 a.m. simply needs slightly less during the daytime hours.
Are Solid Foods Appropriate Yet?
At 4 months, breast milk or formula should still be your baby’s only source of nutrition. The American Academy of Pediatrics and the Dietary Guidelines for Americans recommend introducing solid foods at about 6 months, and introducing them before 4 months is not recommended. Some pediatricians give the green light between 4 and 6 months for babies who show clear signs of readiness: sitting with support, good head and neck control, opening their mouth when food is offered, and swallowing rather than pushing food out with their tongue.
Even when solids do start, they supplement milk rather than replace it. At 4 months, your baby’s entire caloric and nutritional needs are met by breast milk or formula alone, so there’s no rush.