Height and weight is an important indicator to measure whether the growth and development of a child is normal. The standard formula method for calculating normal height and weight of children is introduced as follows: Infant weight standard measurement formula: weight at 1-6 months (kg) = birth weight (or 3 kg) + age of months × 0.6 (kg) 7-12 months weight (kg) = birth weight (or 3 kg) + age of months × 0.5 (kg) 2-10 years weight (kg) = age × 2 + 7 (or 8) Infant height Standard growth pattern: The average length of a full-term child is 50 cm, and the first year after birth it grows about 25 cm, so it is about 75 cm at the age of one year; after that it grows about 5 cm on average every year, so the length of a child after 2-12 years old (cm) = age × 5 + 75 (cm). Any height exceeding 10% or less than 10% of the standard is considered abnormal.