A newborn drinks surprisingly little milk at first, starting with just 1 to 2 teaspoons per feeding on the first day of life and gradually increasing to 2 to 3 ounces per feeding by the end of the second week. The amounts change quickly because a newborn’s stomach grows rapidly during those early days, and feeding volumes rise to match.
How Much Milk a Newborn Needs by Age
At birth, your baby’s stomach is roughly the size of a marble. It holds about 2 to 10 milliliters per feeding, which is less than half an ounce. That tiny capacity is why newborns need to eat so frequently, often 8 to 12 times in a 24-hour period, and why each feeding is brief.
Here’s how feeding volumes increase over the first few weeks:
- First 24 hours: 2 to 10 milliliters per feeding (under half an ounce)
- 24 to 48 hours: 5 to 15 milliliters per feeding (up to about half an ounce)
- Day 3: About 1 ounce per feeding
- Day 7: 1 to 2 ounces per feeding, totaling 10 to 20 ounces over 24 hours
- Weeks 2 and 3: 2 to 3 ounces per feeding, totaling 15 to 25 ounces over 24 hours
By day 10, your baby’s stomach has grown to the size of a ping-pong ball, holding about 2 ounces at a time. This is a dramatic increase from the marble-sized stomach at birth, and it explains why feedings feel like they’re constantly shifting during those first two weeks. The pattern stabilizes somewhat after week three, though your baby will continue eating more as they grow.
Breastfed vs. Formula-Fed Amounts
These volumes apply whether your baby is breastfed or formula-fed, but the practical experience differs. Breastfed babies tend to eat more frequently, sometimes every 1.5 to 2 hours, because breast milk digests faster than formula. You can’t measure what a breastfed baby takes directly from the breast, so you rely on other cues to know they’re getting enough (more on that below).
Formula-fed babies often settle into slightly more predictable intervals, feeding every 2 to 3 hours. If you’re bottle-feeding with expressed breast milk or formula, you can see the exact ounces going in, which makes it easier to track but also creates a temptation to push your baby to finish a bottle. Let your baby stop when they show signs of being full rather than aiming for a specific number on the bottle.
How to Tell Your Baby Is Getting Enough
Diaper output is the most reliable day-to-day indicator. After the first five days, your newborn should produce at least six wet diapers per day. The number of soiled diapers varies, but frequent wet diapers signal that your baby is well-hydrated and taking in enough milk.
Weight gain is the other key measure. Healthy newborns gain about 1.5 to 2 pounds per month during the first few months. Most babies lose a small percentage of their birth weight in the first few days, then regain it by about day 10 to 14. Your pediatrician will track this at each visit, so you don’t need a home scale.
Reading Your Baby’s Hunger and Fullness Cues
Rather than watching the clock or the ounce markings on a bottle, feed your newborn based on what they’re telling you. Early hunger cues include putting hands to their mouth, turning their head toward a breast or bottle, and smacking or licking their lips. Clenched fists are another sign. Crying is actually a late hunger signal. If your baby is crying from hunger, they may have trouble latching or settling into a feeding, so catching the earlier signs makes things smoother for both of you.
When your baby is full, the signs are equally clear: they’ll close their mouth, turn their head away from the breast or bottle, and their hands will relax and open. These cues are consistent across breastfed and bottle-fed babies.
Cluster Feeding Is Normal
Many newborns go through periods where they want to eat every 30 minutes to an hour, especially in the evening. This is called cluster feeding, and it doesn’t mean your milk supply is low or that your baby isn’t getting enough. It’s a normal pattern, often your baby’s way of filling up before a longer stretch of sleep at night. Cluster feeding can feel relentless, but it typically happens in phases and doesn’t last all day.
Growth spurts can trigger similar bursts of frequent feeding. These commonly occur around 2 to 3 weeks and again around 6 weeks. During a growth spurt, your baby may seem hungrier than usual for a few days, then settle back to their previous pattern.
Signs of Overfeeding
Overfeeding is more common with bottle-fed babies because the flow from a bottle is easier to control and babies can passively take in more than they need. An overfed baby often spits up more than usual, has loose stools, and seems uncomfortable with gas or belly pain. When a baby swallows too much milk too quickly, they also swallow extra air, which increases gassiness and fussiness.
To reduce the risk of overfeeding, use paced bottle feeding: hold the bottle at a horizontal angle, let your baby take breaks, and stop when they show fullness cues. If your baby drains a bottle in under five minutes and seems uncomfortable afterward, the nipple flow may be too fast. Starting with the slowest-flow nipple gives your baby more control over how much they take in.