How much should a newborn eat?

Most newborns feed 8 to 12 times in 24 hours, which works out at roughly every 2 to 3 hours around the clock. A formula-fed newborn usually starts at 1 to 2 ounces a feeding in the first days, and a breastfed newborn takes what they take, so the amount is read from cues and wet diapers rather than from a bottle.

The number of feedings matters more than the size of any one of them. Newborn stomachs are small and empty quickly.

Around this age

For breastfeeding, the CDC says a baby will feed about 8 to 12 times in 24 hours, and that most exclusively breastfed babies feed every 2 to 4 hours on average. Some feeding sessions run long and some are over in a few minutes. Some babies feed as often as every hour at times, which the CDC calls cluster feeding — it is a pattern, not a problem.

For formula, the CDC suggests starting with 1 to 2 ounces every 2 to 3 hours in the first days of life, with most formula-fed newborns feeding 8 to 12 times in 24 hours. As a baby grows, their stomach grows with them: they take more at each feeding and the gaps get longer, until most infants are feeding about every 3 to 4 hours.

The AAP puts numbers on the same curve. Breastfed newborns often nurse about every 2 hours, counted from the start of one feeding to the start of the next, so 10 to 12 sessions in 24 hours is the norm. Bottle-fed newborns eat every 2 to 3 hours, with 8 feedings in 24 hours the usual minimum. Babies may take half an ounce at the very first feedings, then 1 to 2 ounces after the first day or two, and by the end of the first month most take at least 3 or 4 ounces per feeding about every 3 to 4 hours. By 6 months, the AAP puts it at 6 to 8 ounces at each of 4 or 5 feedings in 24 hours.

Those are ranges, not targets. The AAP’s general position is that babies are fed whenever they seem hungry rather than on a clock.

What families usually do

Watch the baby, not the hour. The AAP lists the signs of hunger that come before crying: licking the lips, sticking the tongue out, rooting — turning toward whatever brushes the cheek — moving a hand to the mouth, opening the mouth, getting fussy, and sucking on anything to hand. Crying is a late signal, and a frantic baby is harder to feed.

Let the baby decide when they are done. The CDC’s line on formula is that babies generally take what they need at each feeding and stop when they are full. Turning the head away, slowing down, unlatching and losing interest are the usual signs.

Count diapers. The AAP’s rough guide is 2 to 3 wet diapers a day in the first days, and at least 5 to 6 a day from about day 4 or 5, with at least 4 stools a day by the fourth day. It is the most useful thing a parent can count when nobody is measuring ounces.

Expect the pattern to move. Feeding every hour for an evening and then sleeping a longer stretch is ordinary in the first weeks. So is a week where the baby seems hungrier than the one before.

There is a vitamin D note worth knowing. The CDC says babies fed breast milk exclusively, or receiving less than 32 ounces of infant formula a day, need extra vitamin D starting shortly after birth. How much is a question for your pediatrician, and formula is already fortified with it.

When to call your pediatrician

The AAP names three reasons to get in touch: a baby who seems to want to eat constantly even after a full feeding, a baby who is having trouble gaining weight, and any worry you have about how your baby is being fed.

Fewer wet diapers than the counts above, a baby too sleepy to wake for feedings, or a baby who cannot stay latched or take a bottle are all worth a call rather than a wait. Weight checks in the first weeks exist for exactly this, and your pediatrician would rather hear from you early.

Sources

• How Much and How Often to Breastfeed — Centers for Disease Control and Prevention
• How Much and How Often to Feed Infant Formula — Centers for Disease Control and Prevention
• How Often and How Much Should Your Baby Eat? — HealthyChildren.org (American Academy of Pediatrics)

This is educational information from public sources, not a replacement for advice from your child’s healthcare professional.

In Withya, feeds and diapers go into one shared record under Care, so the person taking the next shift can see when the last one was without asking.