Most newborns eat surprisingly little at first, starting with just a teaspoon per feeding on day one, then gradually working up to about 32 ounces of milk or formula per day by the time they’re a few months old. The exact amount depends on your baby’s age, size, and whether they’re breastfed or formula-fed, but there are clear benchmarks at every stage that help you know what’s normal.
How a Newborn’s Stomach Grows
A baby’s stomach is tiny at birth, and it expands rapidly over the first month. Understanding its actual size helps explain why newborns eat so frequently and in such small amounts.
On day one, your baby’s stomach holds about 5 to 7 milliliters, roughly one teaspoon. By day three, it has grown to hold 22 to 27 milliliters. At one week old, a feeding is about 1.5 to 2 ounces (45 to 60 milliliters). And by one month, your baby takes in 3 to 5 ounces per feeding. That’s a dramatic jump in just 30 days, which is why feeding patterns shift so quickly in those early weeks.
Feeding Volumes by Age
Birth to 2 Months
Breastfed babies typically eat every two to three hours, adding up to eight to twelve feedings in a 24-hour period. Formula-fed babies eat slightly less often, around six to ten times per day, because formula takes a bit longer to digest. At this stage, each feeding is small (starting around 1 to 2 ounces and climbing toward 4 ounces by the end of the second month), but the sheer number of feedings means your baby is getting plenty.
2 to 4 Months
Feedings start to space out as your baby’s stomach grows and they become more efficient at eating. Most babies settle into a pattern of eating every three to four hours. Formula-fed babies typically take 4 to 6 ounces per bottle during this stretch. Breastfed babies are harder to measure precisely, but they tend to consume a similar total volume spread across slightly more frequent sessions.
4 to 6 Months
By four months, many babies are taking 4 to 8 ounces per feeding. The total daily intake for formula-fed babies often lands between 24 and 32 ounces. Breast milk or formula remains the sole source of nutrition during this period. The American Academy of Pediatrics recommends exclusive breastfeeding for approximately six months before introducing any solid foods.
6 to 12 Months
Once solids enter the picture around six months, breast milk or formula still remains the main source of nutrition through the first birthday. You’ll start with just one or two tablespoons of a pureed or soft food and watch how your baby responds. Over time, solid foods gradually become a bigger part of the diet, but milk feedings don’t drop off sharply. Most babies in this range still drink 24 to 32 ounces of milk or formula daily, with solid food portions slowly increasing as they develop chewing skills and show interest in more variety.
Breastfed vs. Formula-Fed: Key Differences
Breastfed babies tend to eat more frequently because breast milk digests faster than formula. That means shorter gaps between feedings, especially in the first two months. This is completely normal and doesn’t mean your milk supply is low. Breastfed babies also regulate their own intake more naturally at the breast, taking exactly what they need and stopping when full.
Formula-fed babies eat on a slightly more predictable schedule, and it’s easier to track how many ounces they’re getting. The upper limit to keep in mind: most babies should drink no more than about 32 ounces of formula in 24 hours. Going consistently above that may contribute to overfeeding. If your baby seems hungry beyond that amount, try offering a pacifier or engaging them with play before adding another bottle.
How to Tell Your Baby Is Eating Enough
Since you can’t measure what a breastfed baby drinks, and even bottle-fed babies vary day to day, the best indicators are diapers and weight gain. After day five, your newborn should produce at least six wet diapers per day. The number of soiled diapers varies, but consistent wet diapers are the reliable signal.
Newborns commonly lose a few ounces in the first days after birth. This is expected. They should regain their birth weight by about two weeks old, then continue gaining steadily from there. Your pediatrician will track weight at each visit, and consistent upward growth on their curve is the clearest sign that feeding is going well.
Recognizing Hunger and Fullness Cues
Crying is actually a late hunger signal. Long before that, your baby gives quieter cues that they’re ready to eat. In the first five months, watch for hands going to the mouth, head turning toward a breast or bottle (called rooting), lip smacking or licking, and clenched fists. These early signals are your best window to start a calm, successful feeding.
Fullness looks different. A satisfied baby closes their mouth, turns their head away from the breast or bottle, and relaxes their hands. Those unclenched fingers are a surprisingly reliable sign that your baby has had enough.
Once your baby is older (six months and up), hunger and fullness signals become more obvious. A hungry baby will reach for food, point at it, get excited when food appears, or use sounds and gestures to ask for more. A full baby pushes food away, closes their mouth, or turns their head. Following these cues rather than pushing a set amount helps your child develop healthy eating patterns from the start.
Starting Solid Foods
Around six months, most babies are ready to try solid foods alongside their regular milk feedings. Start small: one or two tablespoons of a single-ingredient puree or soft food is plenty for the first attempts. The goal at this stage is exposure and practice, not calories. Your baby is learning to move food around their mouth, swallow thicker textures, and experience new flavors.
Over the following weeks and months, portion sizes naturally increase as your baby shows more interest and skill. By 9 to 12 months, many babies eat three small meals of solid food per day in addition to breast milk or formula. There’s no exact ounce target for solids at this age. Instead, let your baby’s hunger and fullness cues guide how much they eat at each sitting. Some meals they’ll devour everything, and others they’ll barely touch the spoon. Both are normal.
Common Reasons Intake Varies
Babies rarely eat the exact same amount every day. Growth spurts are a major reason for sudden increases in appetite. These tend to happen around two weeks, six weeks, three months, and six months, though every baby is different. During a growth spurt, your baby may want to eat significantly more often for two to three days before settling back to their usual pattern.
Illness, teething, developmental leaps, and even changes in routine can temporarily reduce appetite. A baby who’s been happily taking 5 ounces per bottle might only want 3 ounces for a day or two. As long as they’re still producing enough wet diapers and bounce back to their normal intake within a few days, short dips are not a concern.