The measure for underweight and overweight is the body mass index (BMI). The BMI is the quotient of a person’s body mass (weight) in kilograms and the square of their body height in metres [kg/m2]. For adults aged 20 years and over, the criteria are as follows:
1. Underweight: BMI < 18.5
2. Healthy weight: BMI >= 18.5 and < 25.0
3. Overweight: BMI >= 25.0
a. Moderately overweight: BMI >= 25.0 and < 30.0
b. Severely overweight: BMI >= 30.0
Different limit values apply to persons under the age of 20. These values depend on the person’s age and gender.