A 1-week-old baby typically drinks 1 to 2 ounces of breast milk per feeding, nursing 8 to 12 times over a 24-hour period. That adds up to roughly 12 to 24 ounces total per day, though the exact amount varies from baby to baby. If those numbers seem small, that’s because a newborn’s stomach is still tiny, and it grows remarkably fast during the first week of life.
How Stomach Size Shapes Feeding Volume
Your baby’s stomach changes dramatically between birth and day seven. On the first day of life, it holds only about 1 to 1.5 teaspoons (5 to 7 milliliters) per feeding. By day three, capacity jumps to roughly 4.5 to 5.5 teaspoons (22 to 27 milliliters). By the end of the first week, most babies can comfortably take in 1 to 2 ounces (30 to 60 milliliters) at a time.
This rapid growth is why feeding amounts increase so quickly. Your body matches this pace: during the first two days you produce colostrum, a thick, concentrated first milk that comes in small volumes but is packed with immune-boosting compounds. Between days two and five, your milk transitions to a thinner, higher-volume form that looks bluish-white. By the end of week one, you’re producing transitional milk in quantities that match your baby’s growing stomach.
How Often to Feed
The American Academy of Pediatrics recommends feeding on demand, at least 8 to 12 times in a 24-hour period. For most 1-week-olds, that means nursing roughly every two to three hours, including overnight. Some feedings will be closer together, some further apart.
Counting ounces matters less than watching your baby’s rhythm. Breastfed babies regulate their own intake at the breast, so the goal is offering frequent opportunities to eat rather than hitting a precise volume at each session. If you’re pumping and bottle-feeding, aiming for 1 to 2 ounces per bottle, 8 to 12 times a day, is a reasonable starting range.
Cluster Feeding in the First Week
Don’t be alarmed if your newborn wants to nurse every hour for stretches at a time. This is cluster feeding, and it’s normal from birth. During the first few days, cluster feeding around the clock is expected as your baby works to establish your milk supply and get enough nourishment from the small volumes of colostrum available.
By the end of the first week, most babies settle into a more spaced-out pattern and stop cluster feeding 24/7. If your baby is older than one week and still nursing almost constantly with no breaks, it could signal they aren’t transferring enough milk. That’s worth a call to your pediatrician.
How to Tell Your Baby Is Getting Enough
Since you can’t measure ounces at the breast, diapers are your best window into what’s going in. After day five, a well-fed newborn produces at least six wet diapers per day. The number of dirty diapers varies, but you should see them regularly.
Weight is the other reliable indicator. It’s normal for newborns to lose some weight in the first few days. Most breastfed babies regain their birth weight by 7 to 14 days after birth. Weight loss greater than 10 percent of birth weight needs further evaluation, so your baby’s first pediatric visit (usually at 3 to 5 days old) will include a weight check specifically to monitor this.
Reading Your Baby’s Hunger and Fullness Cues
Crying is actually a late hunger signal. You’ll have an easier time feeding a calm baby if you catch the earlier cues: putting hands to their mouth, turning their head toward your breast (called rooting), lip smacking or licking, and clenched fists. These all say “I’m ready to eat.”
When your baby has had enough, the signs shift. They’ll close their mouth, turn their head away from the breast or bottle, and their hands will relax and open. Following these cues rather than watching the clock or counting ounces helps your baby eat the right amount for their body at each feeding.
Pumped Milk and Bottle-Feeding Amounts
If you’re exclusively pumping or supplementing with expressed milk, the same 1 to 2 ounces per feeding guideline applies at one week. It can be tempting to prepare larger bottles, but overfilling often leads to overfeeding because bottle flow is faster than breast flow. Start with smaller amounts and offer more if your baby still shows hunger cues after finishing.
Keep in mind that pumping output in the first week is typically low and increases as transitional milk comes in. Pumping small volumes early on does not mean your supply is insufficient. It reflects the same biology that limits a baby to teaspoons of colostrum on day one.