A newborn drinks surprisingly little in the first days of life, starting at just 1 to 2 ounces per feeding and working up to about 32 ounces per day by the end of the first month. The exact amount changes rapidly, sometimes day by day, because a newborn’s stomach grows quickly during those early weeks.
Day by Day in the First Week
On the very first day of life, a newborn’s stomach holds only 5 to 7 milliliters at a time, roughly one teaspoon. Breastfed babies take in just 2 to 10 milliliters per feeding session during those first 24 hours, which feels like almost nothing. This is normal. Colostrum, the thick early milk produced before mature breast milk comes in, is concentrated with nutrients and delivered in tiny amounts. Total colostrum intake in the first 24 hours ranges from about 0.1 to 11 milliliters across all feedings combined.
By day two, things pick up. Each feeding session brings in roughly 5 to 15 milliliters, and the stomach has already expanded to hold 22 to 27 milliliters. By day three, most babies are taking about 1 ounce (30 milliliters) per feeding. At one week old, the stomach holds 1.5 to 2 ounces, and babies typically drink 1 to 2 ounces per session.
For formula-fed newborns, the CDC recommends starting with 1 to 2 ounces every 2 to 3 hours in the first days, then increasing based on hunger cues. With 8 to 12 feedings in 24 hours, a formula-fed newborn in the first few days takes in roughly 8 to 24 ounces total per day, depending on age and appetite.
How Much at One Month
By the end of the first month, most babies take 3 to 5 ounces per feeding. Formula-fed babies gradually build to about 32 ounces per day. A useful rule of thumb from the American Academy of Pediatrics: your baby needs roughly 2.5 ounces of formula per day for every pound of body weight. So a 10-pound baby would need about 25 ounces spread across the day’s feedings. Most babies should not exceed an average of 32 ounces of formula in 24 hours.
Breastfed babies are harder to measure in ounces since milk goes directly from breast to baby. But the per-feeding volumes follow a similar trajectory. At one month, a breastfed baby typically takes 3 to 5 ounces per session, feeding 8 to 12 times a day. Breastfed babies tend to feed more frequently than formula-fed babies because breast milk digests faster.
Breastfed vs. Formula-Fed Differences
Formula-fed and breastfed newborns end up in roughly the same range of daily intake, but the feeding pattern looks different. Formula-fed babies often settle into a more predictable schedule, feeding every 2 to 3 hours with slightly larger volumes. Breastfed babies may cluster-feed, nursing several times within a short window and then going longer between sessions. Both patterns are normal.
One practical difference: with formula, you can see exactly how many ounces your baby drank. With breastfeeding, you rely on indirect signs that your baby is getting enough. That’s where diaper counts and weight gain become your best tools.
How to Tell Your Baby Is Getting Enough
Wet diapers are the simplest daily check. After day five, a well-fed newborn produces at least six wet diapers per day. In the first few days, expect fewer, roughly matching the day of life (one wet diaper on day one, two on day two, and so on).
Weight is the other key marker. Most newborns lose some weight in the first few days, then start regaining between days three and five. About 80 percent of babies are back to their birth weight by two weeks. Weight loss beyond 10 percent of birth weight signals that feeding needs closer evaluation.
Signs that a baby is not getting enough milk include a sunken soft spot on the top of the head, few or no tears when crying, sunken eyes, unusual drowsiness or irritability, and noticeably fewer wet diapers than expected. Any of these in combination warrants prompt attention.
Why the Amounts Feel So Small
New parents often worry that their baby isn’t eating enough, especially in the first 48 hours. It helps to picture a newborn’s stomach. On day one, it’s about the size of a cherry. By day three, it’s closer to a walnut. At one week, it’s the size of an apricot. The stomach simply cannot hold more than a few teaspoons at first, which is why frequent small feedings are the norm rather than a sign of trouble.
Babies are also born with extra fluid and energy reserves that carry them through the first couple of days while milk production ramps up. The small volumes of colostrum are calorie-dense and designed to match exactly what that tiny stomach can handle.
Feeding on Demand vs. a Schedule
In the first month, feeding on demand (responding to hunger cues rather than watching the clock) is more reliable than strict scheduling. Early hunger cues include rooting, bringing hands to the mouth, and turning the head side to side. Crying is a late hunger signal. Offering a feeding before your baby reaches that point makes the process easier for both of you.
Most newborns naturally space feedings every 2 to 3 hours, measured from the start of one feeding to the start of the next. That means 8 to 12 feedings in a 24-hour period. Some sessions will be quick, others will take 30 to 45 minutes, particularly for breastfed babies still learning to latch efficiently. As your baby grows and can take in more per feeding, the intervals between meals gradually stretch.