In the first days of life, a newborn needs just 1 to 2 ounces of formula per feeding, offered every 2 to 3 hours. That works out to 8 to 12 feedings in a 24-hour period. The amounts increase quickly over the first few weeks as your baby’s stomach grows, but starting small is exactly right.
Why Newborns Start With Such Small Amounts
A newborn’s stomach is tiny. On day one, it holds only about 5 to 7 milliliters per feeding, roughly 1 to 1.5 teaspoons. By day three, capacity grows to around 22 to 27 milliliters (about 4.5 to 5.5 teaspoons). By day ten, the stomach can hold 60 to 81 milliliters, or about 2 to 2.75 ounces. This rapid expansion is why feeding volumes change so noticeably in just the first week or two.
How Feeding Amounts Change Week by Week
During the first few days, offer 1 to 2 ounces per feeding. Your baby will likely want to eat every 2 to 3 hours, including overnight. It can feel relentless, but those small, frequent meals match what their stomach can actually handle.
Over the first few weeks and months, the time between feedings stretches out. Most formula-fed babies settle into a pattern of eating every 3 to 4 hours, taking larger volumes at each feeding. By about one month, many babies are taking 3 to 4 ounces per feeding. By two months, that often rises to 4 to 5 ounces. The total daily intake climbs, but the number of feedings drops, so the rhythm becomes more manageable.
A useful general benchmark: expect your baby to gain about 5 to 7 ounces per week during the first three months. If your baby is gaining weight steadily and seems satisfied after feedings, the amount they’re getting is likely right.
How to Tell if Your Baby Is Hungry
Crying is actually a late sign of hunger. Long before that, babies give subtler cues: putting hands to their mouth, turning their head toward the bottle, puckering or smacking their lips, or clenching their fists. Catching these early signals makes feedings calmer for both of you, since a baby who’s already crying and frustrated can have a harder time latching onto the nipple and feeding well.
Fullness cues are equally important. When your baby closes their mouth, turns away from the bottle, or relaxes their hands, they’re telling you they’ve had enough. Trust those signals, even if there’s formula left in the bottle.
Paced Bottle Feeding
Bottles deliver milk faster than a breast does, which means it’s easy for a newborn to take in more than they actually need. Paced feeding is a technique that slows things down and gives your baby more control over the feeding.
Start with a slow-flow nipple. Hold your baby in a nearly upright position, supporting their head and neck. Instead of tilting the bottle up, hold it sideways so the nipple is only half full of milk. Touch the nipple to your baby’s cheek or upper lip and wait for their mouth to open wide rather than pushing the nipple in.
Watch for natural pauses in sucking and swallowing. If you notice gulping, wide eyes, splayed fingers, choking, or milk leaking from the corners of their mouth, lower the bottle so the nipple empties but stays in their mouth. Once your baby starts actively sucking again, bring the bottle back to the sideways position. A full feeding done this way typically takes 15 to 30 minutes.
The key rule: never force your baby to finish a bottle. If they slow down, stop sucking, push away, or fall asleep, the feeding is over. Overfeeding can cause spit-up, gassiness, and general discomfort.
Mixing Formula Correctly
Always follow the mixing instructions on your specific formula’s packaging, measuring the water first and then adding the powder. This matters more than it might seem. Too much water dilutes the formula, meaning your baby won’t get enough calories or nutrients. Too little water concentrates it, putting extra strain on your baby’s kidneys and digestive system and potentially causing dehydration. The ratio on the label is calibrated precisely, so resist the temptation to stretch formula by adding extra water or to make it “richer” with extra powder.
Signs Your Baby Is Getting Enough
In the first few days, wet and dirty diapers are your best real-time feedback. By the end of the first week, you should see at least six wet diapers a day. Steady weight gain is the longer-term confirmation. Most newborns lose a small amount of weight in the first few days after birth, then regain it by about 10 to 14 days. After that, gaining 5 to 7 ounces per week through the first three months is a healthy pace.
If your baby seems constantly hungry even right after a feeding, is producing fewer wet diapers than expected, or isn’t gaining weight, it’s worth checking in with your pediatrician. Sometimes a simple adjustment in volume or feeding frequency is all that’s needed.