Height-to-weight ratio is a standard figure judgment method: if the body mass index value is lower than 18.5, you are thin; If it is between 18.5 and 23.9, congratulations, your weight is the standard weight; If you are over 24, you should lose weight.

Calculation method of infancy: Generally speaking, after 1 year, the baby grows at a rate of 2.5-3.0kg every year, and the weight at 2 years old is about 12kg, which is four times that at birth. Compared with Zengcheng, which is 1 year old, the weight gain after 2 years old is about 2.3kg per year. In adolescence, the body weight can be increased by 4-5kg, and the height can be increased by 5-7cm.

Everyone's height to weight ratio is different. Height-to-weight ratio is one of the important signs to reflect and measure a person's health. Generally expressed by body mass index, the reference standard of China is: 18.5 ≤ body mass index.

Measurement of female students: the ratio of upper body and lower body: taking navel as the boundary, the ratio of upper body and lower body should be 5: 8, which conforms to the law of "golden section". Chest circumference: measured from the fullness above the armpit along the chest, it should be half of the waist circumference: under normal circumstances, measure the thinnest part of the waist. Waist is 20 cm smaller than bust. Hip circumference: the pubic bone is parallel to the largest part of the hip in front of the body. The hip circumference is 4 cm larger than the chest circumference. Leg circumference: at the top of the thigh, below the hip fold line. The thigh circumference is smaller than the waist circumference 10 cm.