A person's weight is not proportional to his height. Because the product or quotient of a person's height and weight is a variable number, not a fixed value. Although a person's weight will increase with the increase of height, it does not mean that there is a direct proportional relationship between them, so a person's height and weight are out of proportion. Weight refers to the total weight of all parts of the human body, which is usually used to measure a person's body shape and health. The normal range of weight varies with gender, age, height, body shape and other factors. The ideal weight of an adult can be estimated by subtracting 105 (in centimeters) from the height, but this value is for reference only, because everyone's physical condition and muscle mass are different.