Question: how many ounces of formula should my 3 month old be taking?
Answer: The American Academy of Pediatrics (AAP) suggests that on average, your baby needs about 2 1/2 ounces of formula a day for every pound of body weight. 1﻿ So a 3-month-old baby weighing 13 pounds needs about 32 1/2 ounces a day.