A healthy newborn typically needs about 2½ ounces of milk per day for every pound of body weight. For an average 7.5-pound baby, that works out to roughly 18 to 20 ounces per day, but this number only applies once feeding is fully established around the end of the first week. In the very first days of life, intake is much smaller and ramps up quickly as your baby’s stomach grows.
The First Few Days: Why Intake Starts Small
At birth, your baby’s stomach is about the size of a marble and holds only 1 to 2 teaspoons of milk. This is why early feedings are tiny. During the first day, a breastfed baby takes in roughly 1 teaspoon per feeding session, and that amount climbs noticeably on days two and three. Breastfeeding mothers produce colostrum during this window, a concentrated early milk that comes in small volumes (typically 2 to 20 milliliters per feed) but is packed with immune-boosting nutrients.
By day 10, your baby’s stomach has expanded to about the size of a ping-pong ball, holding around 2 ounces at a time. This rapid growth means feeding volumes roughly double between the first and second week of life.
Daily Intake by Week
Here’s a general picture of how daily totals progress during the newborn period:
- Days 1 to 3: Very small amounts per feeding, totaling only a few ounces across 8 to 12 sessions per day. This is normal and expected.
- Days 4 to 7: Each feeding increases to about 1 to 2 ounces as milk supply builds (for breastfeeding mothers) or as formula volumes increase. Daily totals reach roughly 12 to 16 ounces.
- Weeks 2 to 4: Most babies settle into taking 2 to 3 ounces per feeding, 8 to 12 times per day. Daily totals land in the range of 16 to 24 ounces, depending on the baby’s weight.
The Weight-Based Formula
The most reliable way to estimate your baby’s daily needs is by weight. The American Academy of Pediatrics guideline for formula-fed infants is about 2½ ounces per pound of body weight per day. So a 6-pound baby needs roughly 15 ounces, while a 9-pound baby needs closer to 22 or 23 ounces.
This calculation works well from about the second week onward and stays useful through the first four to five months of life, when solid foods haven’t yet entered the picture. As your baby gains weight, daily intake naturally creeps up. Most newborns gain about 5 to 7 ounces per week, so you can expect to add a few more ounces of milk to the daily total every week or two.
Breastfed babies don’t come with measuring lines, of course. You won’t know exactly how many ounces they’re getting per session. Instead, you track output and growth, which is covered below.
Breastfed vs. Formula-Fed Babies
Breastfed newborns should nurse 8 to 12 times in a 24-hour period. That’s roughly every 2 to 3 hours, including overnight. Because breast milk is digested faster than formula, breastfed babies tend to eat more frequently but in slightly smaller volumes per session compared to formula-fed babies.
Formula-fed babies often eat slightly less frequently, closer to 8 times per day, because formula takes longer to digest. Each feeding typically falls in the 2- to 3-ounce range during the first few weeks, gradually increasing to 3 to 4 ounces by the end of the first month. The total daily volume usually stays close to the 2½-ounces-per-pound guideline.
Growth Spurts Change the Pattern
Around 2 to 3 weeks of age, many babies hit their first growth spurt. During a spurt, your baby may want to eat significantly more often, sometimes nursing every hour for a stretch. This cluster feeding is normal and typically lasts only a few days. It doesn’t mean your milk supply is low or that your baby isn’t getting enough. It’s your baby’s way of signaling the body to produce more milk to match growing demand.
Another common growth spurt hits around 6 weeks, then again at 3 months and 6 months. Each one temporarily increases hunger before settling back into a predictable rhythm.
How to Tell Your Baby Is Getting Enough
Diaper output is the most practical day-to-day indicator. After day 5, a well-fed newborn produces at least 6 wet diapers per day. Stool frequency varies more, but regular poopy diapers in the first month are a good sign. Steady weight gain at pediatric checkups confirms that overall intake is on track.
Watch for hunger cues rather than feeding on a rigid clock. Signs your baby is ready to eat include fists moving toward the mouth, head turning to look for the breast, lip smacking, and increased alertness. Crying is actually a late hunger signal, a sign of distress rather than the first indication of hunger. Catching the earlier cues makes feedings calmer for both of you.
When your baby is full, you’ll notice them release the breast or bottle nipple, turn away, relax their body, and open their fists. If your baby doesn’t seem interested in latching, they’re likely done.
Signs of Overfeeding
Overfeeding is more common with bottle feeding than breastfeeding because milk flows from a bottle regardless of whether the baby is actively sucking. A baby who is regularly getting too much may spit up more than usual, have loose stools, seem gassy, and cry from abdominal discomfort. In babies who already have colic, overfeeding can make crying episodes more frequent and intense.
Paced bottle feeding helps prevent this. Hold the bottle at a shallow angle so milk doesn’t flow too fast, pause every few minutes, and let your baby set the pace. If your baby turns away or relaxes mid-feed, that’s a signal to stop rather than encourage them to finish the bottle. Following your baby’s fullness cues is more reliable than hitting a specific ounce target at every single feeding.