1. Body fat rate: Body fat rate is the ratio of body fat content to body weight. The formula is body fat rate = (total body fat weight/body weight) × 100%. The measurement methods of body fat rate include instrument measurement, sebum thickness gauge measurement and visual inspection. The reference standard provided by American Sports Commission (ACE) is that women's essential fat content is higher than men's, while men's stored fat content is higher than women's.
2. Body mass index: Body mass index (BMI) is used to evaluate the ratio of weight to height. The formula is body mass index = weight (kg)/height (m). Body mass index below 18.5 means thin, between 18.5-23.9 means normal, between 24-26.9 means obese, and over 29.9 means obese.
To sum up, body fat rate and body mass index can be used as reference indicators to judge whether you are fat or not, but it should be noted that these indicators are for reference only and are not absolute standards. In practical application, it is necessary to make a comprehensive judgment according to the individual's physical condition, health needs and doctor's advice.