A 2-day-old baby typically needs 1 to 2 ounces (30 to 60 mL) of formula per feeding, offered every 2 to 3 hours. That works out to roughly 8 to 12 feedings in a 24-hour period, for a daily total of about 8 to 24 ounces depending on your baby’s size and appetite.
Those numbers might seem surprisingly small. But a 2-day-old’s stomach is tiny, and frequent small feedings are exactly what their body is designed for right now.
Why the Amounts Are So Small
At birth, your baby’s stomach is roughly the size of a toy marble, holding about 1 to 2 teaspoons. By day two, it’s only slightly larger. It doesn’t reach the size of a ping-pong ball (about 2 ounces) until around day 10. This is why small, frequent feedings work better than trying to get your baby to take a larger bottle less often. Their stomach simply can’t hold much yet, and forcing more in leads to spit-up and discomfort rather than better nutrition.
What a Typical Feeding Day Looks Like
Most formula-fed newborns eat 8 to 12 times in 24 hours during the first few days. That means you’ll be feeding roughly every 2 to 3 hours around the clock, including overnight. Start by offering 1 to 2 ounces per bottle. Some feedings your baby will drain the bottle; others they’ll only take half an ounce. Both are normal.
You don’t need to wake a healthy newborn exactly on a timer, but you also shouldn’t let them go much longer than 3 hours between feedings in these early days. Newborns are sleepy, and some will sleep through hunger if you let them. If your baby consistently takes less than an ounce per feeding or is difficult to wake for feeds, that’s worth mentioning to your pediatrician.
How to Tell Your Baby Is Hungry
Crying is actually a late hunger signal, a sign of distress rather than the first sign of hunger. Before that point, a hungry newborn will bring their fists toward their mouth, turn their head as if searching for a nipple, start sucking on their hands or lip smacking, and become more alert and active. Catching these early cues makes feeding easier because a calm baby latches onto a bottle nipple more readily than one who’s already upset.
When your baby is full, they’ll typically pull away from the nipple, turn their head, relax their body, and open their fists. Follow these signals rather than trying to get them to finish a set amount. Not every feeding will be the same size.
Signs Your Baby Is Getting Enough
Diaper output is the most reliable indicator in the first few days. On day two, you should see at least 2 small wet diapers and 1 to 2 bowel movements. These numbers climb steadily over the first week as your baby’s intake increases.
Some weight loss is completely normal. Healthy term newborns lose up to 7% of their birth weight before regaining it by around day 10. For an 8-pound baby, that’s about 9 ounces of weight loss. A loss of 10% or more is a red flag that warrants medical attention, as it can signal inadequate feeding or dehydration.
Signs of Overfeeding
It’s possible to overfeed a formula-fed newborn, though it’s less common than parents worry about. Because formula flows more easily from a bottle than from a breast, babies can take in more than their stomach comfortably handles. The signs are straightforward: excessive spit-up, gassiness, a visibly uncomfortable or distended belly, loose stools, and more crying than usual. If your baby is regularly spitting up large amounts after feeds and seems uncomfortable, try offering slightly less per bottle and feeding a bit more frequently instead.
How Intake Increases Over the First Week
Your baby won’t stay at 1 to 2 ounces for long. The first week of feeding follows a natural progression as their stomach grows. By the end of the first week, many babies take 2 to 3 ounces per feeding. By two weeks, some are up to 3 to 4 ounces. The pace varies from baby to baby, but the general pattern is a gradual daily increase rather than a sudden jump.
Let your baby guide this progression. If they’re consistently finishing their bottle and still showing hunger cues, try adding half an ounce to the next feeding. If they’re regularly leaving formula behind, scale back. The goal is responsive feeding, matching what you offer to what your baby is telling you they need, rather than hitting an exact number on a chart.