The normal weight of a 1.5 year old baby is about 10kg, but there are some individual differences. Normally, the weight of a one-and-a-half year old baby is about 10kg, with slight differences between male and female babies, such as the weight standard for male babies ranging from 10.3 to 12.7kg, and that for female babies ranging from 9.7 to 12.0kg. In addition due to nutrition, sleep, disease and so on will affect the baby’s weight growth, so there are differences in the weight of different babies. 1.5 year old babies who are overweight or underweight need to pay some attention, and if necessary, consult a doctor in time to make reasonable adjustments under the guidance of the doctor to avoid affecting the growth and development of children.