Height overweight calculation is generally used to determine whether one is overweight by calculating the standard weight of an adult or calculating the body mass index. 1. Asian standard weight calculation formula. Its standard weight = (170-100) x 0.9 = 63 kg, in the standard weight fluctuations within 10% above and below the standard weight can be called normal weight, exceeding this value of 10% of the body weight is called overweight, exceeding 20% is called obesity, less than 10% of the value of the standard body weight is called skinny, less than 20% for wasting. 2. Body mass index. Body mass index = weight (kilograms) รท height (meters) squared. According to the world standard, body mass index 18.5~24.9 belongs to normal weight, 25~29.9 belongs to overweight, and body mass index greater than or equal to 30 belongs to obesity; according to the domestic standard, body mass index 18.5~23.9 belongs to normal weight, 24~27.9 belongs to overweight, and body mass index greater than or equal to 28 belongs to obesity.