A one-week-old baby eats about 1 to 2 ounces (30 to 60 ml) per feeding, whether breast milk or formula. At this age, feedings happen frequently, typically 8 to 12 times in a 24-hour period, which means your baby will eat roughly every 2 to 4 hours around the clock.
Why the Amounts Are So Small
A newborn’s stomach grows rapidly in the first week but is still tiny. On the day of birth, it holds only about 5 to 7 ml, roughly one teaspoon, about the size of a cherry. By day seven, it has expanded to hold 45 to 60 ml (1.5 to 2 ounces), closer to the size of an apricot. That fast growth explains why feedings start extremely small and gradually increase over the first few days.
Because the stomach empties quickly at this size, your baby needs to eat often. Eight to twelve feedings per day is normal, and some babies cluster their feeds even closer together during growth spurts or in the evening hours. If your baby seems hungry again an hour after eating, that’s not a sign of a problem. It reflects how quickly a small stomach processes milk.
Breastfed vs. Formula-Fed Amounts
The per-feeding volume is similar for both breastfed and formula-fed babies at one week: 1 to 2 ounces. The difference is mainly in how you track it. With formula, you can see the ounces disappear from the bottle. With breastfeeding, you’re relying on indirect signs that your baby is getting enough.
Breastfed newborns may nurse for up to 20 minutes or longer on one or both breasts per session. The length of a feeding matters less than whether the baby is swallowing actively and seeming satisfied afterward. Breast milk production at this stage averages around 500 to 700 ml per day (roughly 17 to 24 ounces), which aligns well with what a baby consuming 1 to 2 ounces across 8 to 12 feedings actually needs.
Formula-fed babies at one week should not be pushed past the 1 to 2 ounce range per feeding. Overfeeding formula is easier than overfeeding at the breast because the bottle delivers milk at a consistent flow regardless of the baby’s pace. Paced bottle feeding, where you hold the bottle more horizontally and let the baby control the speed, can help prevent taking in too much too fast.
How to Tell Your Baby Is Eating Enough
Since you can’t measure every ounce a breastfed baby takes in, diaper output is the most reliable day-to-day indicator. After day five, a well-fed newborn produces at least six wet diapers per day. The number of dirty diapers varies more, but frequent stooling in the first weeks is a good sign.
Weight is the other key metric. Newborns lose weight in the first few days of life, and breastfed babies lose an average of about 6.6% of their birth weight before they start gaining. Most babies hit their lowest weight around 38 to 39 hours after birth and begin regaining from there. By two weeks, your pediatrician will expect your baby to be back at or near birth weight. If your baby hasn’t regained birth weight by that point, your doctor will likely adjust the feeding plan.
Recognizing Hunger and Fullness
Crying is actually a late sign of hunger. If you wait until your baby is crying hard, they may be too worked up to latch or feed well. Earlier cues are more useful:
- Rooting: turning the head and opening the mouth when something touches the cheek
- Hand sucking: bringing fists or fingers to the mouth
- Lip smacking: making sucking motions or sticking out the tongue
- Restlessness: stirring from sleep, becoming more alert or fidgety
When your baby has had enough, the signals shift. They’ll turn their head away from the breast or bottle, slow down or stop sucking, or simply lose interest. Letting your baby stop when they show these fullness cues, rather than trying to get them to finish a set amount, helps them regulate their own intake from the start.
What Changes After the First Week
Feeding amounts increase steadily as the stomach grows. By one month, most babies take 3 to 4 ounces per feeding, and feedings may space out slightly, though many newborns still eat every 2 to 3 hours. The frequency drops more noticeably between one and two months, when some babies start sleeping one longer stretch at night.
If your baby suddenly wants to eat more often than usual for a day or two, that’s typically a growth spurt rather than a supply issue. These bursts of increased feeding are common around 7 to 10 days, 3 weeks, and 6 weeks. They usually resolve within 48 hours, and for breastfeeding parents, the extra nursing helps signal the body to produce more milk to match the baby’s growing needs.