How much should a 1-month-old baby eat?

A 1-month old baby should eat at least four ounces of formula at each feeding, which should occur six to eight times a day, according to the American Academy of Pediatrics. A 1-month-old baby who is breast-fed generally eats eight to 12 times a day.

A baby's hunger cues are important indicators of whether they are getting enough to eat. Hungry babies reach for the breast, smack their lips or put their fingers in their mouths. Near the end of a feeding session, babies often fall asleep or turn their heads when they are no longer hungry. A baby who is eating enough usually wets six to eight diapers each day. Babies usually gain 1 1/2 to 2 pounds each month between months one and four.