Standardized weight can often be calculated and evaluated in combination with BMI (body mass index), waist circumference and body fat. Standard weight should be determined scientifically by combining gender and height, and different standards should be set for people in different regions. 1. Body Mass Index (BMI) = weight (kg)/height (m)². For example, if a person is 1.6 meters tall and weighs 80 kilograms, his BMI = 80/1.6² = 31.25 (kg/m²). The normal standard of body mass index is between 18.5kg/m²~23.9kg/m², BMI between 24~28kg/m² belongs to overweight; BMI>28kg/m² belongs to obesity; BMI>32kg/m² belongs to moderate obesity; BMI>37kg/m² belongs to severe obesity. 2. Standard weight can also be determined by measuring waist circumference, male waist circumference <85cm, female waist circumference <80cm belongs to the standard weight, more than this range is considered obese. 3. You can also determine the proportion of body fat through the body fat measuring instrument, and the proportion of body fat is different for men and women. Generally, the normal standard is between 20% and 25% for women and between 15% and 18% for men. People with a high fat content and a normal body mass index are also obese.