how many ounces should a newborn eat
1 On average, a newborn drinks about 1.5-3 ounces (45-90 milliliters) every 2-3 hours. This amount increases as your baby grows and is able to take more at each feeding.  At about 2 months, your baby may be taking 4-5 ounces (120-150 milliliters) at each feeding and the feedings may be every 3-4 hours.
0-3 weeks (7 lbs.*) 1/2-1 oz.; increasing to 3 oz., every 2-3 hours; about 8 -10 times a day (12-24 oz.) *To estimate by weight: An average baby should consume 2-3 ounces of formula per day for every pound of his or her body weight, up to a maximum of 32 ounces. So a newborn who weighs 7 lbs will require between 14-21 ounces per day, while a four-month-old who weighs 14 lbs will require between 28-32 ounces.