Newborns drink very small amounts at first. On day one, a healthy full-term newborn typically takes about 1 to 2 teaspoons (roughly 5 to 10 mL) per feeding. By the end of the first week, most take about 1 to 2 ounces (30 to 60 mL) per feeding, and by one month, roughly 2 to 4 ounces (60 to 120 mL). The exact amount varies with age, weight, and feeding method.
Those numbers surprise many new parents. A brand-new baby’s stomach is tiny, and it stretches slowly over the first weeks. Understanding how feeding volumes change — and how to tell whether your baby is getting enough — matters more than hitting an exact number at every feed.
How Many Oz A Newborn Should Drink in the First Week?
Feeding volumes climb quickly during the first seven days, and the pattern is well established in pediatric practice.
On day one, a newborn’s stomach holds only about 5 to 7 mL — roughly a teaspoon. Colostrum, the thick early milk, comes in tiny amounts that match that capacity. By day three, intake usually rises to about 15 to 30 mL (0.5 to 1 ounce) per feeding. By day seven, most newborns take about 1 to 2 ounces (30 to 60 mL) per feeding.
Newborns feed often because their stomachs empty fast. Expect 8 to 12 feedings in 24 hours in the first weeks. That works out to roughly every 2 to 3 hours, sometimes more often during growth spurts.
One detail worth knowing: formula-fed newborns often take slightly larger volumes earlier than breastfed babies, partly because bottle flow is steady and requires less effort. This does not mean one method is better. It means the numbers differ, and that is normal.
How Much Should a Newborn Eat by Age?
Feeding amounts follow a fairly predictable curve over the first month. The table below reflects general ranges discussed in pediatric guidance.
| Age | Amount per feeding | Feedings per day |
|---|---|---|
| Day 1 | 5–10 mL (about 1–2 teaspoons) | 8–12 |
| Day 3 | 15–30 mL (0.5–1 oz) | 8–12 |
| Day 7 | 30–60 mL (1–2 oz) | 8–12 |
| 2 weeks | 60–90 mL (2–3 oz) | 8–12 |
| 1 month | 60–120 mL (2–4 oz) | 7–9 |
These are ranges, not targets. A baby who takes 2.5 ounces at a feed and another who takes 3.5 ounces can both be thriving. Weight gain, diaper output, and behavior tell you more than the number on the bottle.
After the first month, intake continues to rise gradually. By six months, many babies take 6 to 8 ounces per feeding. Solid foods usually begin around six months, but breast milk or formula remains the main source of nutrition through the first year.
How Can You Tell If Your Newborn Is Eating Enough?
Diaper output and weight gain are the most reliable signs. Counting ounces alone can mislead you, especially with breastfeeding, where you cannot see how much milk a baby takes.
What to look for in the first weeks:
- Diapers: By day 5 to 6, expect at least 6 wet diapers and 3 to 4 stools in 24 hours. Stools transition from dark meconium to yellowish, seedy stools by the end of the first week.
- Weight: Newborns typically lose up to 7 to 10 percent of birth weight in the first few days, then regain it by about 2 weeks. After that, steady gain is expected.
- Behavior: A satisfied baby often relaxes, uncurls their hands, and may fall asleep after feeding. A baby who stays fussy or rooty after feeding may still be hungry.
- Swallowing: During breastfeeding, you should hear or see rhythmic sucking with pauses for swallowing, not just rapid flutter sucking.
If diaper counts drop, weight gain stalls, or your baby seems unusually sleepy or difficult to wake for feeds, contact your pediatrician. These can be signs of inadequate intake and are worth checking promptly.
How Often Should You Feed a Newborn?
Feed on demand, which for most newborns means every 2 to 3 hours. Do not let a newborn sleep longer than about 4 hours without feeding in the first weeks, unless your pediatrician says otherwise.
Newborns often cluster feed — several feeds close together, followed by a longer sleep. This is normal and often happens in the evening. Cluster feeding can help boost milk supply in breastfeeding mothers.
Some babies are sleepy and need to be woken for feeds. Others wake frequently on their own. Both patterns can be normal. The key is total intake over 24 hours, not perfect spacing.
Breastfeeding vs. Formula: Do the Amounts Differ?
Breastfed and formula-fed newborns take similar total daily volumes, but the pattern differs.
Breastfed babies control intake directly from the breast and often feed more frequently in smaller amounts. Because breast milk is digested relatively quickly, breastfed newborns may feed every 1.5 to 3 hours.
Formula-fed babies often go slightly longer between feeds because formula takes longer to digest. Bottle-fed babies can also be overfed more easily, since a bottle keeps flowing even when a baby is full. Paced bottle feeding — holding the bottle more horizontal and pausing — can help a baby stop when satisfied.
One clarification: the “ounces” on a bottle do not apply the same way to breastfeeding. You cannot measure breast milk intake directly without weighing the baby before and after feeds, which is usually only done in clinical settings. Trust diaper counts and weight gain instead.
What Are Signs You Are Feeding Too Much or Too Little?
Overfeeding and underfeeding both have recognizable signs, though they can overlap with normal newborn behavior.
Possible signs of overfeeding:
- Frequent large spit-ups after most feeds
- Gassy, uncomfortable behavior shortly after feeding
- Feeding despite showing fullness cues like turning away or pushing the bottle out
Possible signs of underfeeding:
- Fewer than 6 wet diapers per day after the first week
- Dark or brick-colored urine (a sign of dehydration)
- Weight loss beyond the expected early drop, or no regain by 2 weeks
- Extreme sleepiness, weak cry, or difficulty waking for feeds
Spit-up alone is not a reliable sign of overfeeding. Many healthy newborns spit up regularly because the muscle between the stomach and esophagus is still maturing. If spit-up is forceful, green, or accompanied by poor weight gain, that warrants a call to your pediatrician.
When Should You Call a Pediatrician About Feeding?
Call your pediatrician if your newborn is not feeding well, is losing weight after the first week, or shows signs of dehydration. These are common concerns and worth checking rather than waiting.
Specific reasons to call:
- Fewer wet diapers than expected
- Refusing to feed for several hours
- Persistent vomiting, not just spit-up
- Blood in the stool or vomit
- Unusual lethargy or irritability
- No weight gain by two weeks of age
Feeding problems are treatable, and early help makes a difference. Lactation consultants, pediatricians, and feeding specialists can all help identify what is going on.
Frequently Asked Questions
How many ounces should a newborn drink in 24 hours?
In the first week, most newborns take roughly 8 to 16 ounces total per day, rising to about 16 to 24 ounces by one month. These are general ranges; individual babies vary.
Is 2 oz every 3 hours enough for a newborn?
For a baby around one week old, 2 ounces every 2 to 3 hours is often within the normal range. Whether it is enough depends on weight gain and diaper output, not the number alone.
Can you overfeed a newborn?
Yes, especially with bottle feeding, since a bottle keeps flowing even after a baby is full. Signs include frequent large spit-ups and feeding past fullness cues.
How do I know if my newborn is still hungry after feeding?
If your baby stays calm, has steady weight gain, and produces enough wet diapers, they are likely getting enough. Continued rooting, fussiness, or crying right after feeds may mean they need more or need to be burped.
