Most babies drink between 2 and 4 ounces per feeding in the first month, gradually increasing to about 30 to 32 ounces total per day by the time they’re 4 to 6 months old. But the right amount depends on your baby’s age, weight, and whether they’re breastfed or formula-fed. Here’s what to expect at each stage.
The First Week: Smaller Than You Think
A newborn’s stomach is tiny. On day one, it holds roughly a tablespoon of milk. By day three, capacity grows to about half an ounce to one ounce. By the end of the first week, most babies take in 10 to 20 ounces total across a full 24-hour period, spread over 8 to 12 feedings. That works out to roughly 1 to 2 ounces per session.
By days 8 through 10, the stomach stretches to hold 1.5 to 2 ounces at a time. These small, frequent meals are normal and necessary. Newborns digest breast milk quickly and need to eat often, sometimes every 1.5 to 2 hours around the clock.
One Week to One Month
Between one and four weeks of age, most babies drink 2 to 4 ounces per feeding. Total daily intake for breastfed babies rises to 15 to 25 ounces during weeks two and three, then levels off around 24 to 30 ounces per day by the end of the first month. Feedings usually happen 8 to 12 times per day, though some babies cluster-feed (eating several times in quick succession) and then sleep for a longer stretch.
The 2½-Ounce-Per-Pound Rule
For formula-fed babies, a simple guideline helps you estimate the right daily amount: multiply your baby’s weight in pounds by 2.5. That’s the approximate number of ounces they need in a 24-hour period. A 10-pound baby, for example, would need about 25 ounces total per day. Divide that by the number of feedings (typically 6 to 8 at this age) to get the amount per bottle.
This calculation works well from about one month through four to six months, when solid foods start entering the picture. It’s a rough guide, not a rigid prescription. Some days your baby will eat more, some days less.
One to Six Months
One of the more surprising facts about infant feeding is that breastfed babies take in roughly the same total volume from about 4 weeks of age all the way through 6 months. That range is 24 to 30 ounces per day. The composition of breast milk changes over time to meet a growing baby’s needs, so the volume doesn’t have to increase the way you might expect.
Formula-fed babies follow a slightly different pattern. Between 4 and 6 months, they typically consume 28 to 32 ounces per day across 4 to 6 feedings. Individual bottles usually hold 4 to 6 ounces at this stage, sometimes up to 8 ounces for bigger babies. As babies get older and their stomachs grow, they eat more at each sitting and go longer between feedings.
Six to Twelve Months
Once solid foods are introduced (typically around 6 months), milk intake gradually decreases. At 7 to 9 months, most babies still drink 30 to 32 ounces of formula or breast milk per day, spread over 3 to 5 feedings, with solids making up a small but growing portion of their calories. By 10 to 12 months, that drops to about 24 to 30 ounces per day as meals of soft foods become more substantial.
Breastfed babies over 6 months typically take 18 ounces or more per day, though the exact amount varies widely because they’re also getting nutrition from table food. The transition is gradual. Milk or formula remains the primary calorie source through the entire first year, even after solids are well established.
How to Tell if Your Baby Is Getting Enough
Ounce targets are useful, but your baby’s own signals are more reliable than any chart. Hungry newborns put their hands to their mouths, turn their heads toward the breast or bottle, smack or lick their lips, and clench their fists. When they’ve had enough, they close their mouths, relax their hands, and turn away from the nipple.
Older babies (6 months and up) are more obvious about it. They’ll reach for food or get excited when they see it, and push food away or turn their head when they’re done. Following these cues, rather than trying to get your baby to finish a set number of ounces, helps prevent both underfeeding and overfeeding.
Other signs that your baby is eating well include steady weight gain, 6 or more wet diapers a day after the first week, and general contentment between feedings. Occasional fussy days or appetite dips during illness are normal and don’t usually signal a problem.
Breastfed vs. Formula-Fed: Key Differences
Breastfed babies tend to eat smaller amounts more frequently than formula-fed babies, partly because breast milk is digested faster. A breastfed 3-month-old might eat 10 to 12 times a day, while a formula-fed baby the same age might eat 6 to 8 times. The total daily volume ends up in a similar range, but the feeding pattern looks quite different.
Because you can’t see how many ounces a baby takes directly from the breast, it’s common for breastfeeding parents to worry about supply. Tracking wet diapers and weight gain gives you a much clearer picture than trying to guess ounces. If you’re pumping and bottle-feeding breast milk, the 24-to-30-ounce daily range for babies 1 to 6 months is a good benchmark.
Upper Limits and Overfeeding
Most pediatric guidelines consider 32 ounces of formula per day the practical upper limit for infants. Babies who consistently exceed that amount may be taking in more calories than they need, which can contribute to excessive weight gain and digestive discomfort. Babies who are fed breast milk exclusively or who drink less than 32 ounces of formula per day also need a vitamin D supplement, starting shortly after birth.
Overfeeding is more common with bottle-feeding (whether breast milk or formula) because the flow from a bottle is faster and more passive than nursing. Paced bottle feeding, where you hold the bottle more horizontally and let the baby take breaks, can help your baby recognize fullness cues before they’ve taken in too much.
Quick Reference by Age
- Day 1: About 1 tablespoon per feeding
- Day 3: 0.5 to 1 oz per feeding
- Days 8 to 10: 1.5 to 2 oz per feeding
- 1 week to 1 month: 2 to 4 oz per feeding, 8 to 12 times daily
- 1 to 6 months: 24 to 32 oz total per day
- 7 to 9 months: 30 to 32 oz per day plus solids
- 10 to 12 months: 24 to 30 oz per day plus solids