Most babies need about 2.5 ounces of formula or breast milk per pound of body weight each day. That means a 10-pound baby would drink roughly 25 ounces over 24 hours, split across several feedings. But this number shifts constantly as your baby grows, and the per-feeding amount changes dramatically from the first days of life through the first birthday.
The First Two Weeks
A newborn’s stomach is tiny. At birth, it holds only about 1 to 2 teaspoons, roughly the size of a marble. That’s why newborns eat so frequently and take so little at each feeding. By day 10, the stomach has grown to about the size of a ping-pong ball and can hold around 2 ounces.
During the first few days, most formula-fed newborns take 1 to 2 ounces per feeding every two to three hours. Breastfed babies take even smaller amounts of colostrum initially, but feed more often to stimulate milk production. By the end of the first week, most babies are up to 2 to 3 ounces per feeding. Expect 8 to 12 feedings in a 24-hour period during this stretch, including overnight.
One to Five Months
Feeding volumes climb quickly. By 2 months, most babies take 5 to 6 ounces per feeding, with five to six feedings per day. Between 3 and 5 months, that increases to 6 to 7 ounces per feeding at roughly the same frequency. A typical 4-month-old might drink 28 to 32 ounces total in a day.
The 2.5 ounces per pound guideline stays useful throughout this period as a quick check. If your baby weighs 12 pounds, you’d expect around 30 ounces per day. If they weigh 14 pounds, closer to 35. Babies who consistently want more than 32 ounces per day may be ready to discuss feeding adjustments with their pediatrician, since very high volumes can lead to excessive spit-up and discomfort.
Feedings also start to space out naturally. Where a newborn eats every two hours, a 3- or 4-month-old often goes three to four hours between bottles. Nighttime feedings may drop to one or two, though this varies widely.
Six Months and Beyond
Around 6 months, most babies start solid foods. This doesn’t replace milk right away. At 7 months, babies still need 30 to 32 ounces of breast milk or formula per day, spread across three to five feedings. Solids at this stage are more about learning to eat than about calories.
As solid food intake increases through 9 and 12 months, milk volume gradually decreases. Formula and breast milk remain a significant source of calories, protein, calcium, and vitamin D through the entire first year, even as your baby gets more nutrition from table foods. By 12 months, many babies are down to about 16 to 24 ounces of milk per day, with three meals and one or two snacks filling the gap.
How to Tell if Your Baby Is Getting Enough
Charts and ounce ranges are guidelines, not rules. Your baby’s hunger and fullness cues are the most reliable real-time indicators of whether they’re eating the right amount.
Hunger cues in young babies (birth to 5 months) include putting hands to their mouth, turning their head toward the breast or bottle, smacking or licking their lips, and clenching their fists. Crying is a late sign of hunger, not an early one. If you wait until your baby is crying, they may be too upset to latch or feed well.
Fullness cues are equally important. A baby who’s had enough will close their mouth, turn their head away from the bottle or breast, and relax their hands. Your baby does not need to finish every bottle. Pushing them to drain the last ounce can override their natural ability to self-regulate intake.
For older babies eating solids (6 months and up), the cues look different. A hungry baby will reach for food, open their mouth eagerly for the spoon, and get excited when food appears. A full baby pushes food away, closes their mouth, or turns their head. These signals are worth watching closely because they help your baby develop a healthy relationship with eating from the start.
Signs Your Baby Needs More or Less
Steady weight gain is the best overall indicator that your baby is eating enough. Your pediatrician tracks this at well-child visits, but between appointments, wet diapers are a useful proxy. A well-fed newborn produces at least six wet diapers a day after the first week. Fewer than that can signal underfeeding or dehydration.
If your baby seems hungry again shortly after a full feeding, they may be going through a growth spurt. These typically happen around 2 weeks, 6 weeks, 3 months, and 6 months. During a spurt, babies may want to eat more frequently for a few days before settling back into their usual pattern.
On the other hand, if your baby frequently spits up large amounts, seems uncomfortable after feeds, or consistently takes much more than the expected range for their weight, you may be offering too much per feeding. Smaller, more frequent feedings often solve this. Some babies are also faster eaters and may finish a bottle before their brain registers fullness, so pacing bottle feeds with brief pauses can help.
Breastfed vs. Formula-Fed Amounts
The ounce guidelines above apply most directly to formula feeding, since you can measure exactly what goes into a bottle. Breastfed babies are harder to quantify because you can’t see how much they’re taking at the breast. On average, exclusively breastfed babies consume 19 to 30 ounces per day between 1 and 6 months, with intake staying remarkably stable (unlike formula-fed babies, whose volume tends to increase steadily with weight).
If you’re pumping and bottle-feeding breast milk, the same general volume guidelines apply. One difference worth noting: breast milk is digested faster than formula, so breastfed babies often feed more frequently. A breastfed 3-month-old might eat 8 times a day where a formula-fed baby of the same age eats 5 or 6 times. Both patterns are normal. What matters is the total intake over 24 hours and consistent growth on their pediatrician’s chart.