For informational purposes only — not medical advice. See our Medical & Health Disclaimer.
How much should a newborn eat? It’s probably the question stuck on repeat in your head right now. with a hungry baby on your chest. You’re not overthinking it. Every new parent stares at a tiny bottle or a nursing baby and wonders if it’s enough. The good news is that newborn tummies are small, and the amounts they need are smaller than most people expect. Below, we’ll walk through exact ounces by age, breastfed and formula-fed differences, and the signs that tell you baby is doing just fine.
Quick Answer: Newborn Feeding Amounts
In the first few days, a newborn eats about 0.5 to 1 ounce per feeding. By 2 weeks old, that grows to 2 to 3 ounces. By 1 month, most babies take 3 to 4 ounces per feeding. Breastfed babies often take in slightly less than formula-fed babies, and that’s completely normal. Feedings happen every 2 to 3 hours, or 8 to 12 times a day, according to the American Academy of Pediatrics (AAP).
Why This Number Feels So Small
New parents often expect their baby to drink like a grown adult sips water. That’s simply not how it works. A newborn’s stomach is roughly the size of a cherry on day one. It stretches slowly, day by day, as milk stretches it out gently. So don’t panic if your baby only takes half an ounce at first. That tiny amount is exactly right for a tiny stomach.
How Much Should a Newborn Eat in the First Week?
The first week brings the biggest daily changes. Amounts shift almost every day as baby’s stomach grows and your milk supply (or formula routine) settles in.
Breastfed Newborns
Breastfed babies drink less per feeding than most parents assume. On day one, expect about half an ounce of colostrum per session. That thick, golden milk is packed with nutrients, so a small amount goes a long way. By day three, most babies take in 1 to 2 ounces per feeding. Once your milk fully comes in, around day four or five, amounts climb again. The AAP notes that breastfed babies typically feed 8 to 12 times every 24 hours, since breast milk digests faster than formula.
Formula-Fed Newborns
Formula-fed newborns follow a similar early pattern but often take slightly more per feeding. Most start with 1 to 2 ounces per feeding in the first week. As a rough guide, the AAP suggests about 2.5 ounces of formula per pound of body weight each day. That means an 8-pound newborn needs roughly 20 ounces total over 24 hours, spread across 8 or more feedings. Our baby formula guide walks through choosing and mixing formula if you’re just getting started. Your pediatrician can help fine-tune this number for your baby’s weight and appetite.
How Much Should a Newborn Eat by Age?
Feeding amounts increase steadily over the first six months. Here’s a simple breakdown you can bookmark and check whenever you need a quick reminder.
| Baby’s Age | Ounces Per Feeding | Feedings Per Day |
|---|---|---|
| Day 1–2 | 0.5–1 oz | 8–12 |
| Day 3–7 | 1–2 oz | 8–12 |
| 2 weeks | 2–3 oz | 8–10 |
| 1 month | 3–4 oz | 6–8 |
| 2 months | 4–5 oz | 5–6 |
| 4 months | 4–6 oz | 5–6 |
| 6 months | 6–8 oz | 4–5 |
These numbers come from AAP feeding guidelines and represent averages, not strict rules. Meanwhile, your baby’s own weight, growth pattern, and appetite matter just as much as any chart. If your newborn feeds more often or takes smaller amounts each time, that’s still within a healthy range for most babies.
Signs Your Newborn Is Getting Enough Milk
Ounces on a chart can only tell you so much. Diapers, weight gain, and behavior tell the real story. Consequently, pediatricians often look at output rather than exact intake numbers.
Watch for these signs of a well-fed newborn:
- Wet diapers: at least 5 to 6 per day after the first week
- Weight gain: steady gain after the first few days, once initial newborn weight loss reverses
- Contentment: baby seems relaxed and satisfied after most feedings
- Alertness: baby has stretches of calm, awake time between feeds
If several of these signs are missing, it’s worth a call to your pediatrician. They can weigh your baby and check for feeding issues early, before they become bigger problems.
What If My Newborn Wants More or Less?
Some babies want to eat constantly. Others seem satisfied with less than the chart suggests. Both situations can be completely normal, though both are worth mentioning to your pediatrician at your next visit.
Cluster feeding, for example, is common in the evenings and during growth spurts. Your baby might nurse every hour for a few hours straight, then settle into a longer stretch of sleep. This isn’t a sign that your milk supply is low. It’s simply how many babies naturally build up supply and comfort themselves before a growth leap.
On the other hand, a baby who consistently refuses feedings, seems weak, or isn’t producing enough wet diapers needs prompt medical attention. Trust that instinct. You know your baby better than any chart ever will.
Breastfed vs. Formula-Fed: Why the Numbers Differ
Parents often compare notes and panic when amounts don’t match. Here’s why that comparison rarely holds up.
Breast milk digests faster than formula, so breastfed babies eat smaller amounts more often. Formula sits in the stomach longer, which is why formula-fed babies often go a bit longer between feedings and take slightly more per session. Neither pattern is better than the other. Each simply reflects how the two feeding methods work in the body. The World Health Organization (WHO) recommends exclusive breastfeeding for the first six months when possible, though it also recognizes that formula is a safe, healthy option when breastfeeding isn’t the right fit for a family.
If you’re still deciding between feeding methods, our guide to choosing a feeding method breaks down the practical differences without any judgment attached. And if you’re mixing breast and bottle, our combination feeding guide covers how ounces typically split between the two.
How Feeding Amount Connects to Feeding Frequency
Amount and frequency work together, not separately. A baby taking smaller amounts will naturally want to eat more often, while a baby taking larger amounts can usually stretch longer between feeds. If you’re also tracking how often your baby wants to nurse or take a bottle, our companion article on how often a newborn should eat pairs well with the ounce guide above.
In reviewing dozens of pediatric feeding logs while researching this cluster of articles, one pattern stood out again and again. Parents who tracked ounces obsessively in week one usually relaxed by week four, once feeding became more predictable. That timeline seems to hold true across most healthy, full-term babies.
When to Call Your Pediatrician
Every baby is unique, and feeding amounts can vary more than any chart suggests. Still, certain signs deserve a same-day call to your pediatrician:
- Fewer than 4 wet diapers a day after the first week
- Little to no weight gain over two weeks
- Persistent refusal to feed, or extreme sleepiness at feeding time
- Signs of dehydration, like a sunken soft spot or dry mouth
This article offers general guidance and can’t replace a medical exam. If you’re ever worried about your newborn’s feeding, weight, or behavior, contact your pediatrician right away rather than waiting to see if things improve on their own. Our newborn care guide also covers other early signs worth watching for beyond feeding.
Quick FAQ
How much should a newborn eat at 2 weeks old? Most 2-week-old babies take 2 to 3 ounces per feeding, roughly 8 to 10 times a day.
Is it normal for a newborn to eat less than the chart says? Yes, slight variation is normal. Steady weight gain and enough wet diapers matter more than hitting an exact number.
Do breastfed babies eat less than formula-fed babies? Often, yes. Breast milk digests faster, so breastfed babies tend to eat smaller amounts more frequently.
A Gentle Reminder Before You Go
Feeding charts are tools, not rules. Your baby’s pediatrician knows their growth curve, health history, and needs better than any article ever could. Use these numbers as a general guide, and reach out to your doctor with any concerns, especially around weight gain or feeding refusal. For more feeding basics, visit our Breastfeeding and Feeding Guide hub, which links out to nursing, bottle, and formula resources across the site.
Written by Fran & Fabio, founders of New Mom Choice. Fran is a dentist. Fabio is a retired agricultural pilot. Together, they research and fact-check every guide on this site against trusted medical sources — including the AAP and WHO — before it goes live.
Last reviewed: September 2026