The calculation formula of body mass index is: weight (kg)/ height (m) squared. According to the standards of the World Health Organization, a body mass index below 18.5 is thin, 18.5-24.9 is normal, 25-29.9 is overweight, and over 30 is obese. Therefore, body mass index 29 belongs to overweight category, not obesity category. Although the overweight index of 29 is relatively high, the base is not large.

Body mass index (BMI) is a method to measure the ratio of weight to height, which is usually used to evaluate a person's obesity.