How to calculate body mass index? What is the normal value?

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

Normal value: 18.5-23.9.

Body mass index (BMI) is the most commonly used tool to measure the ratio of weight to height in the world. It uses the ratio of height to weight to measure whether a person is too thin or too fat.

The body mass index is suitable for all people aged 18 ~ 65, except children, developing teenagers, pregnant women, wet nurses, the elderly and muscular people.

The calculation formula is as follows:

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

For Asian adults, please follow the following guidelines:

Incidence of diseases in the body mass index category *

& lt 18.5 The prevalence of some diseases and some cancers increased.

18.5-23.9 normal

24-27.9 Overweight

& gt28 Obesity

Extended data:

The world standard of obesity is:

Body mass index (BMI) ranges from 18.5 to 24.9, with BMI greater than 25 being overweight and BMI greater than 30 being obese.

Asian obesity standard: Asians are too young to be measured by the world obesity standard.

For example, when the Japanese body mass index is 24.9, the risk of hypertension will increase by three times; In China, the mortality rate of body mass index is the lowest, which is 23.7. The higher the mortality rate, the greater the initial increase.

The obesity standard of Asians should be that the body mass index is normal at 18.5-22.9, the body mass index greater than 23 is overweight, and the body mass index greater than 30 is obese.

China obesity standard: China experts believe that although China people belong to Asian race, the upper limit of the normal range of body mass index should be lower than the Asian standard.

The best value of China people's body mass index should be 20-22, with a body mass index greater than 22.6 as overweight and a body mass index greater than 30 as obesity.

Baidu encyclopedia-body mass index