A healthy 1-week-old typically eats 1 to 2 ounces per feeding, whether breast milk or formula. Over a full day, that adds up to roughly 10 to 20 ounces total. But the exact amount varies from baby to baby, and the best measure of “enough” isn’t the number on a bottle. It’s your baby’s weight gain and diaper output.
How Much Per Feeding
At one week old, your baby’s stomach is still tiny. It holds about 2 to 2¾ ounces at its maximum (around day 10), which is why feedings are small and frequent. For context, at birth the stomach holds less than a teaspoon. By day 3, it’s grown to about 4½ to 5½ teaspoons. By the end of the first week, it can comfortably hold 1 to 2 ounces per session.
If you’re formula feeding, the CDC recommends starting with 1 to 2 ounces every 2 to 3 hours. If you’re breastfeeding, your baby will take a similar volume of milk per session, though you won’t be able to measure it directly. Either way, don’t try to push more than your baby wants. A stomach that’s overfilled just leads to spit-up and discomfort.
How Often to Feed
Breastfed newborns typically nurse every 2 hours, measured from the start of one feeding to the start of the next. That works out to 10 to 12 sessions in 24 hours. Bottle-fed newborns eat every 2 to 3 hours, with 8 feedings per day as the recommended minimum.
These numbers mean you’ll be feeding around the clock, including overnight. That’s normal. Your baby’s small stomach empties quickly, and frequent feeding is what drives your milk supply if you’re breastfeeding. By the end of the first week, feedings generally start to space out slightly as your baby takes in more per session.
Cluster Feeding in the First Week
Don’t be alarmed if your baby wants to eat every 30 to 60 minutes for several hours in a row. This is called cluster feeding, and it’s common from the very first day. During a cluster, each individual feeding may be smaller than usual, but the total adds up.
Cluster feeding serves a purpose: it signals your body to produce more milk and helps your baby take in enough calories during a period of rapid growth. By the end of the first week, most babies stop cluster feeding around the clock, though occasional bursts continue for weeks. If your baby seems to cluster feed nonstop with no periods of satisfaction or sleep, that’s worth mentioning to your pediatrician, as it can sometimes signal a latch issue or low milk supply.
How to Tell Your Baby Is Hungry
Crying is actually a late hunger signal. By the time a newborn is wailing, they’ve already been telling you they’re hungry for a while. The earlier cues to watch for:
- Hands to mouth: sucking on fingers or fists
- Rooting: turning their head toward your breast or toward anything touching their cheek
- Lip movements: smacking, licking, or puckering
- Clenched fists
When your baby is full, you’ll see the opposite: their mouth closes, their hands relax and open, and they turn away from the breast or bottle. Trust these signals rather than trying to get your baby to finish a specific number of ounces.
Signs Your Baby Is Getting Enough
Since you can’t measure how much a breastfed baby drinks, and even bottle-fed babies vary from feeding to feeding, the most reliable indicators are diapers and weight.
After day 5, a well-fed newborn produces at least 6 wet diapers per day. Stool frequency varies more, but you should see multiple dirty diapers as well during the first week. If you’re consistently seeing fewer than 6 wet diapers, your baby may not be getting enough milk.
Weight is the other key metric. Newborns lose weight in the first few days after birth. The average breastfed baby loses about 6.6% of birth weight before starting to regain around day 2 or 3. A loss of 10% or more is a red flag that usually prompts your pediatrician to evaluate feeding and hydration more closely. Most babies regain their birth weight by about 10 to 14 days. Your baby’s first pediatric visits are specifically designed to track this, so keep those early appointments.
Formula vs. Breast Milk: Does the Amount Differ?
The per-feeding volume is roughly the same: 1 to 2 ounces at one week. The difference is in frequency. Breast milk digests faster than formula, so breastfed babies tend to eat more often. A breastfed baby averaging 12 feedings at 1.5 ounces each and a formula-fed baby averaging 8 feedings at 2 ounces each end up in a similar daily range.
If you’re supplementing with both breast milk and formula, there’s no single formula for splitting the amounts. Feed on demand, watch your baby’s hunger and fullness cues, and track diaper output. The total daily intake of 10 to 20 ounces is a reasonable benchmark regardless of what combination you’re using.
When Intake Increases
The first week is just the starting point. Your baby’s stomach grows rapidly, and feeding volumes increase week by week. By one month, most babies take 3 to 4 ounces per feeding. By two months, 4 to 5 ounces is typical. You’ll notice the shift naturally as your baby starts draining bottles faster or nursing for longer sessions while spacing feedings further apart.
Growth spurts at around 2 weeks, 3 weeks, and 6 weeks often cause a temporary jump in feeding frequency. Your baby may suddenly want to eat every hour again for a day or two. This is normal and usually resolves within 48 hours.