Most newborns eat 1 to 2 ounces per feeding in the first week of life, gradually increasing to 3 to 4 ounces per feeding by the end of the first month. That progression happens because a newborn’s stomach is incredibly tiny at birth and grows rapidly over the first few weeks.
How a Newborn’s Stomach Grows
On the day your baby is born, their stomach holds only about 5 to 7 milliliters, roughly one teaspoon. That’s why those first feedings are so small and so frequent. By day three, capacity jumps to about 22 to 27 milliliters (just under an ounce). By the end of the first week, the stomach can hold 1.5 to 2 ounces at a time. And by one month, your baby comfortably takes in 3 to 5 ounces per feeding.
This rapid expansion is why feeding amounts change so quickly in the early days. Trying to feed a day-old baby two ounces would overwhelm a stomach that’s barely the size of a marble. Following your baby’s lead keeps intake matched to what their body can actually handle.
Ounces Per Feeding: Week by Week
For formula-fed babies, the CDC recommends starting with 1 to 2 ounces every 2 to 3 hours in the first days of life. Most newborns eat 8 to 12 times in 24 hours during this period, which means total daily intake is quite low at first but adds up through frequent feeds.
Over the first month, babies gradually work up to 3 to 4 ounces per feeding. By the end of month one, the daily total for a formula-fed baby is typically around 32 ounces. The American Academy of Pediatrics notes that babies generally should not exceed an average of 32 ounces of formula in 24 hours.
For breastfed babies, exact ounce counts are harder to measure since milk comes directly from the breast. The pattern is the same, though: 8 to 12 feedings per day, with the amount per session increasing naturally as your milk supply builds and your baby’s stomach grows.
What Cluster Feeding Looks Like
Cluster feeding, where your baby wants to eat several times in a short stretch, starts on day one. In the first few days, near-constant feeding is normal. Your baby may take in only 2 to 10 milliliters per session but want the breast or bottle every hour or so. By day three, intake roughly triples to about an ounce per feeding, and by the end of the first week, feedings settle into the 1 to 2 ounce range.
In the weeks that follow, cluster feeding often shifts to the evening hours. This happens partly because the hormone that drives milk production dips in the evening for breastfeeding mothers, meaning slightly less milk is available per session. Your baby compensates by feeding more frequently. This is not a sign that something is wrong or that your supply is failing. It’s a built-in adjustment your baby makes on their own.
How to Tell If Your Baby Is Hungry or Full
Ounce guidelines are useful starting points, but your baby’s own cues are the most reliable guide. Hunger signs in newborns include putting hands to their mouth, turning their head toward the breast or bottle (called rooting), lip smacking or licking, and clenched fists. Crying is actually a late hunger signal. If you can catch the earlier cues, feeding goes more smoothly.
When your baby is full, they’ll close their mouth, turn their head away from the breast or bottle, and relax their hands. These signals are worth paying attention to, even if there’s still milk left in the bottle. Letting your baby stop when they show fullness cues helps prevent overfeeding and teaches healthy self-regulation from the start.
Signs of Overfeeding
Overfeeding is more common with bottle-fed babies because milk flows more easily from a bottle than a breast, and it’s tempting to encourage a baby to finish what’s been prepared. A baby who’s consistently getting too much may spit up more than usual, seem gassy or uncomfortable in the belly, have loose stools, and cry more from digestive discomfort. The issue is that their stomach simply can’t process the excess properly.
If you notice these patterns, try offering slightly smaller amounts more frequently rather than larger, less frequent bottles. Pacing the feeding by holding the bottle at a slight angle and pausing periodically also helps your baby recognize when they’re full before they’ve taken in too much.
How to Know Your Baby Is Getting Enough
The clearest sign that feeding is going well is steady weight gain. It’s normal for newborns to lose up to 10% of their birth weight in the first few days, but they should regain it by about two weeks old. After that, healthy newborns gain roughly 1 ounce (28 grams) per day through the first few months. Your pediatrician will track this at each visit, but at home, you can watch for a few reliable indicators.
A well-fed newborn produces at least 6 wet diapers a day by the end of the first week. Stools transition from dark meconium to yellow, seedy stool (for breastfed babies) or tan, soft stool (for formula-fed babies) within the first few days. Your baby should seem content between feedings, not constantly fussy or showing hunger cues right after eating. And they should be alert during wake periods rather than unusually sleepy or difficult to rouse for feedings.
Quick Reference by Age
- Day 1: 5 to 7 ml (about 1 teaspoon) per feeding, 8 to 12 feedings per day
- Day 3: About 1 ounce per feeding
- Week 1: 1 to 2 ounces per feeding, 8 to 12 feedings per day
- End of month 1: 3 to 4 ounces per feeding, up to about 32 ounces total per day
These ranges apply to formula-fed babies. Breastfed babies follow the same general trajectory but self-regulate their intake at the breast, so tracking ounces is less practical. Focus on feeding frequency, diaper output, and weight gain instead.