A one-week-old baby eats roughly 1.5 to 2 ounces per feeding, about 8 to 12 times in a 24-hour period. That works out to somewhere around 12 to 24 ounces total per day, depending on whether your baby is breastfed or formula-fed and how frequently they want to eat. The amounts feel tiny, but they match a one-week-old’s stomach, which is only about the size of an apricot.
Stomach Size Sets the Limit
At one week old, your baby’s stomach holds 45 to 60 milliliters, or about 1.5 to 2 ounces, at a time. That’s a dramatic jump from birth, when the stomach held only about 5 to 7 milliliters (roughly a marble’s worth). This rapid growth is why feeding amounts change noticeably even within the first few days.
Because the stomach is still so small, your baby needs to eat frequently to get enough nutrition across the full day. Trying to push more volume into a single feeding won’t work well. Babies who take in more than their stomach can comfortably hold tend to spit up the excess. Smaller, more frequent feedings keep things moving smoothly.
Formula-Fed Babies at One Week
If your baby is exclusively formula-fed, you’ll typically offer 1 to 2 ounces per feeding every 2 to 3 hours. Most formula-fed newborns eat 8 to 12 times in 24 hours, which means you can expect to prepare a bottle roughly every 2 to 3 hours around the clock, including overnight. At 2 ounces per feeding and 8 to 12 feedings, the daily total lands between 16 and 24 ounces.
Some babies will drain the full 2 ounces, others will consistently stop at 1.5. Both are normal. The key is to let your baby set the pace rather than trying to get them to finish a predetermined amount. If your baby is turning away from the bottle or falling asleep partway through, they’ve had enough for that session. You can always offer another feeding sooner if they show hunger signs again.
Breastfed Babies at One Week
Breastfed babies eat on roughly the same schedule, nursing 8 to 12 times in 24 hours, and sometimes more. In the first week, your baby may want to nurse as often as every 1 to 3 hours. Cluster feeding, where your baby wants to nurse several times in quick succession (often in the evening), is common and does not mean your supply is low. It actually helps stimulate milk production.
Because you can’t measure the exact volume during breastfeeding, session length sometimes serves as a rough guide. Most newborns nurse for about 10 to 20 minutes per side, though some efficient feeders finish faster. What matters more than minutes on the clock is whether your baby seems satisfied afterward and is producing enough wet and dirty diapers (more on that below).
How to Tell Your Baby Is Getting Enough
Diaper output is the most reliable at-home indicator. After day five, a well-fed newborn produces at least six wet diapers per day. The number of dirty diapers varies more, but you should be seeing them regularly. If your baby consistently falls short of six wet diapers, that’s worth a call to your pediatrician.
Weight is the other major marker. It’s normal for babies to lose up to 10% of their birth weight in the first week, mostly from fluid loss. Most babies regain that weight by about two weeks of age. Your pediatrician will check weight at the first few office visits, and steady gain after that initial dip is a strong sign that feedings are on track.
Reading Your Baby’s Hunger Cues
One-week-olds communicate hunger through clusters of small physical signals, not just crying. In fact, crying is a late-stage distress signal, not an early hunger cue. By the time a baby is crying from hunger, they’ve already been signaling for a while. Learning to spot the earlier signs makes feedings calmer for both of you.
Early hunger cues include opening and closing the mouth, bringing hands to the face, rooting (turning the head and nuzzling against whoever is holding them), making sucking noises, and sucking on fingers, hands, or anything nearby. These behaviors tend to show up together rather than in isolation. A baby who is doing several of these at once is ready to eat.
How to Tell Your Baby Is Full
Fullness signals are just as important as hunger cues, especially if you’re bottle-feeding and might be tempted to encourage those last few sips. A baby who is done eating will:
- Slow down or stop sucking on the bottle or breast
- Turn their head away from the nipple
- Relax and extend their fingers (clenched fists often signal hunger; open hands suggest satisfaction)
- Push or arch away from the breast or bottle
- Fall asleep at the breast or bottle
A single one of these signals on its own doesn’t always mean the feeding is over. Your baby might pause, rest, and then resume. But when you see several together, the meal is done. Respecting these cues from the very beginning helps your baby develop healthy self-regulation around eating.
Night Feedings Are Non-Negotiable
At one week old, your baby’s stomach empties quickly, and their caloric needs relative to body size are enormous. That means night feedings are a biological necessity, not a habit to break. Most one-week-olds need to eat every 2 to 3 hours overnight, and some breastfed babies wake even more frequently. This stage is temporary, but it’s an important part of making sure your baby gains weight on schedule after that normal initial dip.
If your baby is sleeping longer than 3 to 4 hours at a stretch during the first week or two, your pediatrician may actually recommend waking them to feed, particularly if they haven’t yet regained their birth weight.