Is a 13 8 BMI overweight

Overweight (obesity / obesity)


The Working Group for Obesity in Childhood and Adolescence (AGA) recommends using the so-called Body Mass Index (BMI) for assessing body weight in children and adults. The BMI shows the relationship between weight (in kg) and body surface (in m²). From a BMI of 25, an adult is considered overweight and therefore has a slightly increased risk of secondary diseases. From 30 he is considered obese, i.e. obese.

It is much more difficult to classify children and adolescents. For this reason, the BMI was determined for specific ages and genders from the height and weight data of a total of 17,147 boys and 17,275 girls in the age range from 0-18 years. Percentile curves were created on this basis. A BMI is an indication of obesity if the age and gender-specific 90% mark is exceeded. One speaks of obesity when the BMI is above the 97% mark.

The Working Group for Obesity in Childhood and Adolescence (AGA) classifies, for example, 3-7-year-old boys from a BMI of around 18 as overweight, from a BMI of around 19-20 they are considered obese - at the latest, intervention is recommended. The same values ​​apply to girls of this age. In 11-year-old girls and boys, a value from 24 is critical, in 16-year-olds from around 28. Overall, the determination of overweight is a clinical visual diagnosis, since the excessive fat mass is externally visible. However, this clinical impression should be confirmed by determining the BMI.

Below you will find detailed tables for assessing the BMI or weight of your child (curves and tables from the new AGA guidelines, p. 25ff.).

Percentage curves for the BMI - girls aged 0-18 years (AGA guidelines, p. 27)

Percentile curves for the BMI - boys aged 0-18 years (AGA guidelines, p. 27)

Percentile table for girls aged 0-18 years (AGA guidelines, p. 26)

Percentile table for boys aged 0-18 years (AGA guidelines, p. 25)

BMI calculator for children and adolescents

If your child is above the critical values ​​(97th percentile), you should definitely consult your pediatrician. If the pediatrician determines that you are very overweight, he will first determine whether a physical illness has triggered the weight gain (see causes). If no causes are found here, the young patient should be examined for other causes of obesity such as poor diet, lack of exercise or psychological stress.

In order to detect secondary diseases at an early stage, blood pressure and some blood values ​​are checked regularly on an empty stomach (cholesterol, HDL / LDL cholesterol, triglycerides, glucose and liver enzymes).

Author: äin-red

Technical support: Thomas Kauth

last change: 25.02.2021