There are several methods of calculating standard weight, and using different calculations can yield different results. Common formulas are the algorithm published by the World Health Organization and common easy algorithms, etc. 1, the first algorithm: the World Health Organization recommended algorithm, male standard weight = [height (cm) – 80] × 70%; female standard weight = [height (cm) – 70] × 60%. Assuming that the character is an adult male, after bringing the height of 180cm into the formula, (180-80) × 70% = 70 (kg). And if the person is female, (180-70) × 60% = 66 (kg); 2. The second algorithm: standard weight (kg) = height (cm) – 105. after bringing the height 180cm into the formula, 180-105 = 75 (kg), the standard weight of 180cm under this algorithm is 75kg. this algorithm can only be applied to adults of fixed height, for the elderly and small children is not applicable, with certain limitations; 3, the third algorithm: standard weight = height (m) × height (m) × standard coefficient (20 for women, 22 for men). Assuming that the character is an adult male, the height of 180 cm into the formula, 1.8 × 1.8 × 22 = 71.28 (kg). And for women, 1.8 × 1.8 × 20 = 64.8 (kg). These calculations, in the standard weight floating 10% above and below are normal weight, floating 10% ± 20% is overweight or thin, floating 20% above is obese or wasting. In addition, there are many kinds of standard weight calculation methods, as long as the result roughly belongs to the normal range can be, do not have to overly pursue the standard and programmed.