170 standard is 64.44 kg, 90 kg -5.2 grade 48 points-slightly thin, and nutrition needs to be strengthened. More than 80 points are normal 1 Figure: 1.00- 1.99 m standard weight. Figure 2: Reasonable and accurate classification from the fattest standard to the thinnest standard. Figure 3-6: It is convenient to check whether you are fat or thin, and you are too lazy to calculate the logarithm. Figure 7-8: Comparison with the commonly used local approximate straight line formula Figure 9: The body mass index is not as good as the first two straight lines locally, but it is better than the straight line as a whole, but it is not available. Figure 10: The formula of the Academy of Military Sciences is a partial linearization of the inaccurate body mass index, and the result is even more inaccurate. Weight series tells you the degree of obesity like earthquake series, and the greater the absolute value, the greater the harm. The weight score tells you the degree of obesity just like the test score. The higher the score, the closer it is to the standard.