A baby weighing 3kg usually drinks about 60g of formula milk per day, but there are individual differences. Normal newborn babies who are breastfed are usually nursed on demand, and the number of feedings is also determined by the baby’s needs. If they are fed according to formula, then the decision is based on the formula ration. The amount of milk a newborn baby drinks is related to the baby’s weight, nutritional intake and the formula supply of milk powder, which needs to be correctly prepared according to the ratio of the formula. In general, a 3kg baby needs about 60g of milk powder per day to basically meet the needs of the baby’s growth and development. If babies born prematurely are slow to feed or have poor appetite, we should actively look for the cause and treat the symptoms. If the baby is sick and cannot be fed according to the amount of milk that a normal baby needs, he or she can be fed according to medical advice.