Question: 12 weeks how much formula?
Answer: To determine how many ounces per bottle, divide the ounces needed in a 24-hour period by the number of feedings your baby takes during that time. Therefore, if your 12-pound baby needs 30 ounces a day and takes 6 bottles in a 24-hour period, then each bottle would need to be approximately 5 ounces. 4 lbs. 10 oz.