The standard of height and weight for a 7-year-old baby can be calculated by the formula, the height is about 124cm or so, and the weight is about 22kg or so. But there are individual differences. The standard height and weight of a 7 year old baby can be calculated according to the formula.The formula for calculating the height and weight of a 7 year old baby is height (cm) = age x 7 + 75 and weight (kg) = (age x 7 – 5) รท 2. The height is about 124cm and the weight is about 22kg. However, it should be noted that the calculated standards are for reference only and are not absolute. The height and weight of babies are affected by many factors such as genetics, nutrition, environment and diseases, so there is a big difference between individuals. However, if the height and weight of babies are obviously different from that of children of the same age, it is recommended to consult a doctor in time to exclude disease factors, and if necessary, to actively treat and deal with the disease.