Girls 158cm weighing between 45 and 60kg. According to the World Health Organization, the body mass index (BMI) = weight (kg)/height (m)² is used to calculate normal weight, and the BMI for normal weight is between 18 and 22. According to the above formula, a girl of 158cm weighing between 45 and 60kg is in line with the normal BMI. If the girl’s weight is low, it means that she is emaciated. It is necessary to clarify the cause of emaciation, supplement nutrition, eat more protein-rich food, such as beef, milk, fish, etc., relax and maintain a good state of mind. If the girl’s weight is high, it indicates overweight or obesity. You need to control your weight, eat lightly and regularly. Long-term adherence to physical exercise, such as jogging, swimming, playing ball games and so on.