If an adult is 1.6 meters tall, their standard weight is about 55 kilograms; if a child is 1.6 meters tall, their standard weight will change according to their age, which is calculated by the formula: age x 2 + 8. Standard weight plus or minus 10% is the normal weight range. There are many ways to calculate the normal weight of an adult, and one of the simpler formulas is: standard weight (kg) = height (cm) – 105. If the height is 160 cm, the standard weight should be 55 kg, and 10% plus or minus this is the normal range. If the weight is greater than 10% of the standard weight, it is called overweight, and if the individual’s weight is less than 10% of the standard weight, it is called thin. If an individual weighs more than 20% of the standard weight can be called mild obesity, higher than 30% of the standard weight can be called moderate obesity, higher than 50% of the standard weight is called severe obesity. If the individual’s weight is too much over the normal weight, need to pay attention to, can go to the hospital for examination, clear overweight or obesity causes, early treatment, in order to prevent overweight, causing other physical problems.