Too high or too low weight is related to certain diseases, there are various ways to calculate standard weight, the standard weight for height 165cm can be calculated according to the following methods: 1, according to the body mass index formula to calculate: adult body mass index (BMI) = weight (kg)/height^2 (m), according to the normal body mass index of human body between 18.5-23.9, standard weight between 50- 65kg between, this algorithm is applicable to the weight calculation of adults over 18 years old, including men and women, with certain limitations; 2, according to the standard weight formula to calculate: ① adult standard weight (kg) = height (cm) – 105, the ideal weight for up and down 10%, calculated for a height of 165cm, the standard weight range between 54-66kg, including adult men and women; ② standard weight = height (m) × height (m) × standard coefficient, the standard coefficient of 20 for women and 22 for men, the calculation can be obtained from the height of 165cm female standard weight of 54.45kg, male standard weight of 59.9kg; 3, according to the World Health Organization’s standard weight formula to calculate: male standard weight (kg) = [height (cm) – 80] × 70%; female standard weight (kg) = [height (cm) – 70] × 60%. Calculation can be obtained from the height of 165cm male standard weight of 59.5kg, the standard weight of women is 57kg, this algorithm fluctuates 10% up and down are normal. These methods are commonly used to calculate the standard weight method, there are also different methods of calculation according to the age and gender. You should get into the habit of monitoring your weight regularly, pay attention to a balanced diet, drink more water, eat less and eat more, increase exercise and ensure sufficient sleep, and try to keep your weight within the normal range.