The formula for pediatric height from 2 to 12 years old is: age * 7 + 75 (cm). There is no fixed formula for the height of children before the age of 2, the average height at birth is 50cm, the first year of growth in height for about 25cm, the fastest growth in the first 3 months after birth, with the latter 9 months of growth in height is basically the same, about 12cm or so; the second year can be increased by 11~12cm, to reach a height of 87cm or so. The formula for the height of children aged 2 to 12 years old is: height = age * 7 + 75 (cm). 12 years old for the second peak of growth and development, that is, puberty, children’s height and weight grow rapidly, the secondary sexual characteristics are also mature during this period of time, the boy’s height for one year can be increased by an average of 9cm, the girl can be increased by an average of 8cm. Children can be calculated by a certain height formula, the resulting value can be used as a reference, but not absolute. Because height is affected by genetics, nutrition, disease and other factors, individual differences are large. If the height of a child is significantly different from the standard, it is recommended to consult a doctor in time.