A newborn eats surprisingly little at first, starting with just 2 to 10 milliliters per feeding on day one and gradually increasing to 80 to 150 milliliters by one month of age. Those early amounts look tiny, but they match a stomach that’s only about the size of a cherry at birth. Here’s how feeding volumes change week by week and how to tell if your baby is getting enough.
Feeding Volumes From Day One Through One Month
Your baby’s stomach capacity at birth is roughly 20 milliliters, or about four teaspoons. A useful rule of thumb is that a newborn’s stomach holds approximately 7 milliliters per kilogram of body weight, so a 3.5 kg baby (around 7.7 pounds) can comfortably hold about 25 ml at a time. Pushing beyond that capacity doesn’t help; it just leads to spit-up and discomfort.
Here’s what normal feeding volumes look like for expressed breast milk in the first few weeks:
- First 24 hours: 2 to 10 ml per feeding
- 24 to 48 hours: 5 to 15 ml per feeding
- 72 hours (day 3): about 30 ml (1 ounce)
- Day 7: 30 to 60 ml (1 to 2 ounces)
- Weeks 2 and 3: 60 to 90 ml (2 to 3 ounces)
- One month: 80 to 150 ml (roughly 3 to 5 ounces)
The stomach itself grows rapidly alongside these volumes. On day one it holds just 5 to 7 ml. By day two, capacity jumps to 22 to 27 ml. By day seven it reaches 45 to 60 ml, and by one month it can hold 80 to 150 ml. The feeding volumes and stomach sizes are closely matched, which is why the small amounts in the first days are completely normal and sufficient.
How Often Newborns Need to Feed
Because those per-feeding volumes are so small, newborns eat frequently. Most newborns, whether breastfed or formula-fed, need 8 to 12 feedings in a 24-hour period. That works out to a feeding roughly every two to three hours around the clock. Some babies cluster their feedings closer together during parts of the day, especially in the evening, and then go a slightly longer stretch at night.
Breastfed babies often feed on the higher end of that range because breast milk digests faster than formula. Formula-fed babies may settle closer to 8 feedings per day as they approach the end of the first month, since formula takes a bit longer to move through the stomach. Either pattern is normal as long as your baby is gaining weight and producing enough wet diapers.
Formula vs. Breast Milk Volumes
The per-feeding volumes listed above are based on expressed breast milk, but they serve as a reliable starting guide for formula as well. In practice, formula-fed babies sometimes take slightly larger volumes per feeding and feed slightly less often because formula is digested more slowly. The total daily intake, however, tends to be similar.
If you’re formula feeding, there’s a greater risk of overfeeding because the bottle delivers milk with less effort than the breast. Babies can drain a bottle quickly even after they’re full, simply because the flow keeps coming. Paced bottle feeding (more on that below) helps prevent this.
How to Tell Your Baby Is Getting Enough
When you’re breastfeeding directly, you can’t measure milliliters, so diapers and weight become your best indicators. After day five, your newborn should produce at least six wet diapers per day. The number of soiled diapers varies more widely and isn’t as reliable a marker on its own, but frequent stooling in the early weeks is a good sign.
Weight is the most definitive measure. Nearly all newborns lose some weight in the first few days. A loss up to about 7 percent of birth weight is typical, and anything under 10 percent is generally considered acceptable. Eighty percent of babies regain their birth weight by two weeks of age. If weight loss exceeds 10 percent or your baby hasn’t returned to birth weight by two weeks, that warrants a closer look at feeding.
Reading Your Baby’s Hunger and Fullness Cues
Rather than watching the clock or measuring exact milliliters, your most reliable tool is your baby’s behavior. Early hunger cues include putting hands to the mouth, turning the head toward your breast or a bottle (called rooting), puckering or licking the lips, and clenching the fists. Crying is a late hunger signal. Feeding goes much more smoothly when you catch those earlier cues.
Fullness looks different: your baby will close their mouth, turn their head away from the breast or bottle, and relax their hands. If you see these signs, the feeding is done, even if there’s milk left in the bottle. Respecting these cues helps your baby develop the ability to self-regulate intake from the very beginning.
Paced Bottle Feeding to Prevent Overfeeding
If you’re bottle feeding (with formula or expressed breast milk), paced feeding is a technique worth learning. The idea is to slow the flow of milk so your baby has to work for it in a way that mimics breastfeeding. This gives them time to recognize fullness before the bottle is empty.
The basics: use a slow-flow nipple, hold your baby in an upright or slightly reclined position rather than laying them flat, and keep the bottle more horizontal so milk fills only the tip of the nipple. Let your baby suck a few times before tilting the bottle enough for milk to flow. When they pause naturally, tilt the bottle back down so the flow stops, but keep the nipple gently in their mouth. When they start sucking again, tilt it back up.
This approach helps babies regulate their own intake, reduces gas and spit-up, and lowers the risk of overfeeding. Over time, it builds healthier eating habits. Babies who learn to stop when full during bottle feeding carry that self-regulation forward as they transition to solid foods.
When Volumes Don’t Match the Charts
The milliliter ranges above are averages. A baby born at 2.5 kg will naturally take less per feeding than one born at 4 kg. Premature babies have even smaller stomachs and need smaller, more frequent feedings. Growth spurts, which commonly happen around days 7 to 10 and again around three weeks, can temporarily increase how much and how often your baby wants to eat.
What matters more than hitting a specific number is the overall pattern: steady weight gain after the first week, plenty of wet diapers, and a baby who seems satisfied after feedings. If your baby is consistently taking far less than expected and seems lethargic or is losing weight, or if they’re taking much more and frequently vomiting large amounts, those are signs that feeding needs closer evaluation.