For example, for a woman whose height is 160 cm, her standard weight should be160 (cm)-105 = 55 (kg). People who exceed the standard weight 10% are overweight, those who exceed the standard weight 20% are obese, those who are below 10% are emaciated, and those who are below 20% are emaciated.
Generally speaking, the standard weight of men is: height (cm)- 100 = standard weight (kg).
For example, a man with a height of 170cm should weigh170 (cm)-100 = 70 (kg). People who exceed the standard weight 10% are overweight, more than 20% are obese, less than 10% are emaciated and less than 20% are emaciated.
The method of calculating the standard weight by the World Health Organization;
Male: (height cm-80) × 70% = standard weight.
Female: (height cm-70) × 60% = standard weight.
Standard weight plus or minus 10% is normal weight.
Standard weight plus or minus 10 ~ 20% overweight or underweight.
Obesity or underweight is defined as plus or minus 20% of standard weight.
Extended data:
Children's body mass index values are not only applicable to adults. For growing children, we can also use their body mass index to calculate whether they are overweight. The above formula for calculating body mass index is also applicable to people aged 2-20, but their overweight and body mass index are not determined by a fixed body mass index value. This is because children in different regions grow at different speeds, and it is easy to make wrong judgments if a fixed value is used. ?
Many countries and regions make statistics on the height and weight of local children every year. These statistics can be converted into body mass index values, and then the distribution of body mass index values of local children can be counted. According to this distribution, the local health government can calculate the overweight and underweight indicators of local children.
Generally speaking, the average body mass index and its standard deviation are used, and then the highest 5% and lowest 5% of its normal distribution are calculated as overweight and underweight indicators. On the other hand, children whose body mass index is within 85%-95% of the normal distribution are at risk of being overweight.