Newborns eat far less than most new parents expect. In the first 24 hours of life, a healthy full-term newborn typically takes only about 1 to 2 teaspoons of colostrum per feeding — roughly 5 to 10 milliliters. By day three to five, intake rises to about 1 to 2 ounces per feeding, and by the end of the first month most newborns take 2 to 4 ounces per feeding, feeding 8 to 12 times in 24 hours.
Those numbers surprise people. A newborn’s stomach is genuinely tiny, and it stretches over the first weeks of life. Understanding how that works — and how to tell whether your baby is getting enough — matters more than hitting an exact number at every feed.
How Many Oz Does a Newborn Eat in the First Week?
Feeding volumes change fast in the first week, and the change is driven by stomach size and by the shift from colostrum to mature milk.
On day one, a newborn’s stomach holds roughly 5 to 7 milliliters — about a teaspoon. That is why colostrum, the thick yellowish milk produced in the first days, comes in such small amounts. It is concentrated, and the volume matches what the stomach can hold.
By day three, the stomach has stretched to hold roughly 22 to 27 milliliters, about an ounce. By day seven, it holds roughly 45 to 60 milliliters, about 1.5 to 2 ounces.
Here is the part that trips people up. The stomach does not stretch like a balloon that stays stretched. It is a muscular pouch that relaxes to accept milk and then returns to its resting size. That is one reason newborns feed so often — small capacity means frequent refills.
A typical progression looks like this:
- Day 1: 5 to 10 mL per feeding (about 1 to 2 teaspoons)
- Day 2: 10 to 15 mL per feeding
- Day 3 to 4: 15 to 30 mL per feeding (about 0.5 to 1 oz)
- Day 5 to 7: 30 to 60 mL per feeding (about 1 to 2 oz)
These are general ranges. Some babies take more, some less, and both can be normal. What matters more than any single feed is the pattern across a full day.
How Much Should a Newborn Eat by Age?
Intake climbs steadily through the first month, then levels off into a more predictable rhythm.
By the end of week one, most newborns take about 1 to 2 ounces per feeding and feed 8 to 12 times in 24 hours. That works out to roughly 12 to 24 ounces per day in the first couple of weeks.
By two to four weeks, many babies take 2 to 4 ounces per feeding. Daily totals often land somewhere between 16 and 32 ounces, though the range across healthy babies is wide.
By one month, most newborns are taking 3 to 4 ounces per feeding, still 8 to 12 times a day. From about one month to six months, intake tends to settle at roughly 4 to 6 ounces per feeding, with the number of feeds gradually dropping as volume per feed rises.
Formula-fed babies often follow a slightly more predictable volume curve because the amount is measured. Breastfed babies are harder to measure directly, which is why diaper output and weight gain are used instead. Both approaches can support healthy growth.
How Do You Know If a Newborn Is Eating Enough?
Diaper counts and weight gain are the two most reliable signs, and both are more useful than trying to measure ounces at the breast.
In the first few days, a newborn produces roughly one wet diaper per day of life — one on day one, two on day two, and so on. By day five or six, that settles into at least six wet diapers per day. Stool patterns vary widely. Breastfed newborns often have several small yellow stools per day early on; formula-fed babies may stool less often. What matters is that stools are happening and the baby seems comfortable.
Weight is the other marker. Newborns typically lose some weight in the first few days — often up to about 7 to 10 percent of birth weight — and then regain it. Most are back to birth weight by around two weeks. After that, steady gain is the goal.
Other signs a baby is getting enough:
- Feeding 8 to 12 times in 24 hours
- Audible swallowing during feeds
- Seeming content and settled after most feeds
- Waking on their own to feed
- Alert periods that gradually lengthen
Signs worth raising with a pediatrician include fewer wet diapers than expected, persistent sleepiness that makes feeding difficult, and weight that is not moving in the right direction at checkups.
How Often Should a Newborn Eat?
Newborns feed 8 to 12 times in 24 hours, which works out to roughly every two to three hours. That frequency is not optional — it reflects real physiology.
Newborns have small stomachs and fast digestion. Breast milk is digested in roughly 90 minutes, which is why breastfed babies often feed more frequently than formula-fed babies. Formula takes somewhat longer to digest, so formula-fed newborns may stretch to three or four hours between feeds.
Night feeds matter. Prolactin, the hormone that drives milk production, is released in higher amounts overnight. Skipping night feeds early on can reduce overall supply for breastfeeding mothers.
Many newborns need to be woken to feed in the first weeks, especially if they are sleeping longer than three to four hours. This is common in the early days when babies are sleepy and jaundice can make them sleepier still. A pediatrician can advise on whether and when waking is needed for a specific baby.
Cluster feeding — several feeds close together, often in the evening — is normal and not a sign of low supply. It is common during growth spurts and in the early weeks.
How Much Should a Newborn Eat From a Bottle?
Bottle-feeding volume is easier to track, but that can lead to overfeeding if paced feeding is not used.
For expressed breast milk or formula, a reasonable starting point in the first week is 1 to 2 ounces per feed, increasing gradually. By one month, 3 to 4 ounces per feed is typical. These are starting points, not targets to force.
Paced bottle feeding mimics the natural pauses of breastfeeding. The idea is to hold the bottle more horizontal than vertical, let the baby actively draw milk rather than have it flow by gravity, and pause every so often. This gives the baby a chance to register fullness before more milk goes in.
Signs of overfeeding include spitting up large amounts, frequent gas and discomfort after feeds, and a baby who seems to be eating well past the point of satisfaction. Newborns have a strong suck reflex, so they will often keep drinking from a bottle even when full if the flow continues.
A rough daily guide for the first month:
- Week 1: 1 to 2 oz per feed, 8 to 12 feeds per day
- Week 2 to 4: 2 to 4 oz per feed, 8 to 12 feeds per day
- One month and beyond: 3 to 4 oz per feed, gradually increasing
These are general ranges. Individual babies vary, and a pediatrician can help interpret whether a specific baby’s intake is on track.
What About Formula vs. Breast Milk Amounts?
Volumes are broadly similar, but the feeding experience and the way parents track intake are different.
Breastfed newborns are fed on demand and intake is judged by output and weight rather than measured ounces. This is normal and expected. The American Academy of Pediatrics and other pediatric bodies recommend exclusive breastfeeding for about the first six months when possible, with continued breastfeeding alongside solids afterward, but formula feeding is a safe and healthy alternative when breastfeeding is not possible or not chosen.
Formula-fed newborns are typically fed a measured amount, often starting at 1 to 2 ounces per feed in the first days and increasing as hunger cues suggest. Formula is digested more slowly than breast milk, so feeds may space out a bit more.
One thing worth knowing: breast milk changes composition over the course of a feed. Foremilk, the milk at the start, is more watery, while hindmilk, toward the end, is higher in fat. This is one reason breastfeeding is not easily measured in ounces — the same volume can deliver different amounts of energy depending on where in the feed it comes from.
When Should You Call a Pediatrician?
Feeding concerns are one of the most common reasons parents call a pediatrician in the first month, and that is appropriate. Some signs warrant a call sooner rather than later.
Contact a pediatrician if a newborn:
- Has fewer wet diapers than expected for their age
- Is very difficult to wake for feeds
- Is not back to birth weight by around two weeks
- Vomits forcefully or repeatedly, not just small spit-ups
- Seems to be in pain or distress during or after feeds
- Has not had a stool in several days, especially with a hard or swollen belly
- Is feeding fewer than 8 times in 24 hours in the early weeks
Trust your instincts. If something feels off, a call costs little and can catch problems early. Feeding issues caught early are usually easier to address than ones that have been developing for weeks.
Frequently Asked Questions
How many oz should a newborn eat in 24 hours?
In the first week, most newborns take roughly 1 to 2 ounces per feeding and feed 8 to 12 times a day, totaling about 8 to 24 ounces. By one month, daily totals often reach 16 to 32 ounces, though the healthy range across babies is wide.
Is 2 oz enough for a newborn?
Yes, 2 ounces is a typical amount for a newborn around day five to seven and can be enough for a full feed at that age. What matters more is the total across 24 hours and whether diaper output and weight gain are on track.
How do I know if my newborn is still hungry after a feed?
Hunger cues include rooting, hand-to-mouth movements, and lip smacking, while a satisfied baby usually relaxes their hands and body and settles. If a baby consistently seems unsatisfied after feeds, it is worth checking with a pediatrician.
Can you overfeed a newborn?
Overfeeding is more common with bottle-feeding than breastfeeding, because a bottle can keep flowing even when a baby is full. Paced bottle feeding, which slows the flow and includes pauses, helps reduce the risk.
