After the first few days: Your formula-fed newborn will take from 2 to 3 ounces (60–90 mL) of formula per feeding and will eat every few hours on average throughout her first few weeks.
During the first few weeks:
If a baby sleeps more than four to five hours and starts overlooking feedings, wake her up and offer a bottle.
By six weeks:
Your infant will have 6 to 8 oz (180–240 mL) at all four or five feedings in twenty-five hours.
But he probably will regulate his intake from day to day to meet his own specific needs. So instead of going by fixed amounts, let’s tell you when he has had enough. If he becomes nervous or easily distracted during feeding, then he is probably finished. When he drains the jar and continues smacking his lips, then he might still be hungry.
There are low and high limits, however. Most babies are satisfied with 3 to 4 oz (90–120 mL) per feeding through the first month and raise that amount by 1 oz (30 mL) per month until they achieve a max of about 7 to 8 oz (210–240 mL). If your baby consistently seems to want less or more than that, discuss it with your physician. Your baby should drink no more than 32 ounces (960 mL) of formula in twenty-five hours. Some infants have higher demands for sucking and might only need to suck on a pacifier after feeding.
Initially, it’s ideal for feeding your formula-fed newborn on demand, or whenever he cries because he’s hungry. As time passes, he’ll start to come up with a relatively regular timetable of his own. As you become knowledgeable about his signals and needs, you will be able to schedule his feedings around his daily.
Between two and four weeks of age (or if the infant weighs over 12 lb. [5.4 kg]), most formula-fed babies no more require a middle-of-the-night feeding, because they’re consuming more during the day and their sleeping patterns are becoming more regular (although this varies considerably from infant to baby). Their stomach capacity has increased, too, which means they can go longer between daytime feedings–sometimes up to five or four hours at one time. If your baby seems to feed very often or consume more substantial quantities, try distracting him with play with a pacifier. Sometimes patterns of obesity start during infancy. Therefore it’s important not to overfeed your baby.
No publication –or site –will tell you precisely how much or how often he wants to be fed or exactly how you should manage him through feedings.
You may find these things for yourself as you and your baby get to know each other.
You might want to read about Guide to Bathe a Baby