A newborn drinks surprisingly little milk at first, starting with just 1 to 2 ounces per feeding in the early days and working up to about 32 ounces total over 24 hours by the end of the first month. The exact amount changes rapidly because a newborn’s stomach grows dramatically in the first few weeks of life.
How a Newborn’s Stomach Grows
On day one, your baby’s stomach holds only about 5 to 7 milliliters, roughly one teaspoon. That tiny capacity is why those first colostrum feedings or small formula amounts are enough. By day three, the stomach expands to about 22 to 27 milliliters. At one week old, it holds 1.5 to 2 ounces (45 to 60 ml), and by one month it reaches 3 to 5 ounces (80 to 150 ml) per feeding.
This rapid growth is why feeding volumes increase so quickly. Your baby isn’t suddenly hungrier for no reason. Their body is physically able to take in and process more milk with each passing day.
Daily Totals: Week by Week
In the first few days of life, formula-fed newborns typically take 1 to 2 ounces per feeding every 2 to 3 hours. With 8 to 12 feedings in a 24-hour period, that works out to roughly 8 to 24 ounces total per day, depending on the baby’s age in days and individual appetite.
Over the first month, babies gradually increase to 3 to 4 ounces per feeding, reaching about 32 ounces total per day by the end of that month. A useful rule of thumb: your baby needs about 2.5 ounces of formula per day for every pound of body weight. So a 9-pound baby would need roughly 22 to 23 ounces spread across the day.
Breastfed babies follow a similar pattern, though their intake is harder to measure directly. They feed 8 to 12 times per day in the first weeks, with each session lasting anywhere from 10 to 20 minutes per breast. Breast milk production adjusts to match demand, so frequent feeding in those early days is what builds an adequate supply.
The 32-Ounce Guideline
Most babies should drink no more than about 32 ounces (960 ml) of formula in 24 hours. This is a general ceiling rather than a target. Some babies reach it by 4 weeks, others not until later. Babies who consistently take in 32 ounces or more of formula daily get enough vitamin D from the formula itself and don’t need a separate supplement for it.
If your baby regularly wants more than 32 ounces, it’s worth checking whether the feeding pace is too fast (common with bottles) or whether other comfort needs are being mistaken for hunger.
Signs Your Baby Is Hungry or Full
Rather than watching the clock or measuring exact ounces, the most reliable guide is your baby’s own behavior. Hunger cues in newborns include putting hands to their mouth, turning their head toward the breast or bottle (rooting), puckering or smacking their lips, and clenching their fists. Crying is a late hunger signal, not an early one. Ideally, you’re offering a feed before your baby gets to that point.
Fullness looks different: your baby will close their mouth, turn away from the breast or bottle, and relax their hands. These signals mean the feeding is done, even if there’s still milk left in the bottle. Pushing a baby to finish a predetermined amount overrides these natural cues and can lead to discomfort.
How to Tell Your Baby Is Getting Enough
Diaper output is the simplest daily check. After day five, a well-fed newborn produces at least six wet diapers per day. The number of dirty diapers varies more, but consistent wet diapers are a strong signal that hydration and intake are on track.
Weight is the other key marker. Newborns commonly lose up to 10 percent of their birth weight in the first two to three days. This is normal and expected. They should regain that weight and return to their birth weight by about two weeks old. After that, steady weight gain at regular checkups confirms that daily intake is sufficient.
Growth Spurts Change the Pattern
Just when you think you’ve figured out a rhythm, your baby will suddenly want to eat more often, sometimes clustering several feedings close together. These growth spurts typically happen around 2 to 3 weeks, 6 weeks, 3 months, and 6 months, though the timing varies from baby to baby.
During a growth spurt, a breastfed baby may nurse every hour for a day or two. A formula-fed baby may drain bottles faster and seem unsatisfied at their usual volume. This is temporary. The increased demand usually settles within a few days, and for breastfeeding parents, the extra nursing signals the body to produce more milk to match the baby’s growing needs.
Overfeeding With a Bottle
Overfeeding is more common with bottle feeding than breastfeeding because milk flows from a bottle with less effort, and it’s easy for a baby to drink faster than their brain registers fullness. If your baby drinks more than their stomach can comfortably hold, they may spit up frequently or seem uncomfortable and fussy after feeds.
Paced bottle feeding helps prevent this. Hold the bottle at a more horizontal angle, let your baby take breaks every few minutes, and stop when you see fullness cues rather than encouraging them to finish the last half ounce. This approach works whether you’re using formula or pumped breast milk.