A 1-month-old baby typically needs about 3 to 4 ounces (90 to 120 ml) of breast milk or formula per feeding, with about 8 to 10 feedings in a 24-hour period

. This means the baby consumes roughly 24 to 40 ounces (700 to 1200 ml) in total per day

. Feeding details:

• Breastfeeding: Babies usually nurse every 1.5 to 3 hours, about 7 to 9 times daily. The amount is not precisely measured since babies self-regulate by stopping when full

. Breastfed babies often feed more frequently because breast milk digests faster

• Formula feeding: Formula-fed babies generally eat every 3 to 4 hours, taking about 3 to 4 ounces per feeding. They tend to have a more predictable feeding schedule

• Daily intake by weight: According to Australian guidelines, babies need about 150 ml of milk per kilogram of body weight per day. For example, a 4 kg baby would need about 600 ml in 24 hours, divided over 6 to 7 feedings

Additional notes:

• Feeding on demand and watching for hunger cues like rooting, lip licking, or fussiness is recommended over strict schedules

• Newborns may start with smaller amounts (1 to 2 ounces) in the first weeks and gradually increase to 3 to 4 ounces by one month

• Total daily intake is roughly 2.5 ounces per pound of body weight, but individual needs vary

In summary, a 1-month-old should generally eat about 3 to 4 ounces per feeding, roughly 8 to 10 times a day, totaling around 24 to 40 ounces daily, with adjustments based on the baby's hunger cues and weight.