How to calculate body mass index

Body mass index (BMI) is a number obtained by dividing the weight in kilograms by the square of the height in meters. It is an international standard to measure the degree of fatness and thinness of human body and whether it is healthy or not. Mainly used for statistical purposes, when we need to compare and analyze the impact of a person's weight on the health of people of different heights, the body mass index value is a neutral and reliable indicator.

Body mass index was originally designed as a statistical tool for public health research. When we need to know whether obesity is the cause of a disease, we can convert the patient's height and weight into body mass index, and then find out whether there is a linear relationship between this value and the incidence. However, with the development of science and technology, the current body mass index value is only a reference value. To truly measure whether a patient is obese, the body fat rate is more accurate than the body mass index, and the waist height is better than the body fat rate, but the best view is to look at visceral fat (if the visceral fat is normal, even if the waist circumference is large and the body fat rate is high, the health risk is not high, and many Japanese sumo wrestlers use this fat method). Therefore, the role of body mass index has gradually changed, from medical use to mass weight loss index. Body mass index is the abbreviation of body mass index, which means "body mass index" in Chinese. It is calculated according to your height and weight. Body mass index (BMI) is an internationally recognized grading method for evaluating the degree of obesity, and the World Health Organization (WHO) also uses BMI to define obesity or overweight.

The concept of height and body mass index was first put forward by Belgian generalist kettler in the middle of19th century. It is defined as follows:

Body mass index (BMI) = weight (kg) ÷ height 2 (m)

For example: 70kg (1.75x1.75) = 22.86.

For example:

For example, a person's height is 1.75m and his weight is 68kg, and his body mass index = 68/( 1.75 2) = 22.2 (kg/m 2). When the body mass index is 18.5 ~ 23.9, it is normal.

Body mass index (BMI) is an index closely related to body fat, which takes into account two factors: weight and height. Body mass index is simple and practical, which can reflect the overweight and obesity of the whole body. It is more accurate to measure the risk of heart disease, hypertension and other diseases due to overweight than to identify them simply by weight.