Normal weight: body mass index = 18-25.

Overweight: body mass index = 25-30.

Mild obesity: body mass index >; 30

Moderate obesity: body mass index >; 35

Severe obesity: body mass index >; 40

Male: (height cm-80) × 70% = standard weight.

Female: (height cm-70) × 60% = standard weight.

Body mass index (BMI) is a number obtained by dividing the weight in kilograms by the square of the height in meters. It is a widely used international standard to measure the degree of obesity and health.

Mainly used for statistical purposes, when we need to compare and analyze the impact of a person's weight on the health of people of different heights, the body mass index value is a neutral and reliable indicator.

Reference: Baidu Encyclopedia "Body Mass Index"