BMI Calculator Baby

BMI calculator to calculate the Body Mass Index (BMI) for boys and girls

The BMI calculator calculates the BMI and ranks the result according to age and sex according to the BMI tables to a week for infants and displays the result graphically.


BMI progress in age diagram

The diagram shows the BMI value in the age-dependent diagram with the colored classification areas. The diagram shows the course of the BMI limits for the first weeks of the baby's life. The diagram is created gender dependent for boys and girls.

BMI Calculation

The Body Mass Index (BMI) is a measure that sets the weight in the ratio to the square of the body weights. The BMI is a rough guide, since it does not take into account either stature or weight distribution. Since the beginning of the 1980s, the BMI has also been used by the World Health Organization. The present BMI classification of the WHO has essentially existed since 1995.

BMI = m ÷ L2

with m : Weight in kg, L : Height in m

Example for the calculation of the BMI:

For example, if a person is 175 cm tall and weights 65 kg, then the BMI is calculated as follows:

BMI = m ÷ L2 = 65 ÷ 1.752 = 65 ÷ (1.75 ⋅ 1.75) = 65 ÷ 3.0625 = 21.2

The interpretation of the calculated BMI value is based on the comparison with the tabulated average values of the population. That is, the normal range (green in the diagrams) corresponds to the average in the population at the time of the survey.

Explanation of the BMI

The Body Mass Index (BMI) is a measure of a person's body weight in relation to their height. The BMI is only a rough guide value, as it does not take into account a person's stature or the individual composition of body mass from fat and muscle tissue. Age and gender play an important role in the interpretation of the BMI. In children and infants, the BMI can be used as a rough guideline for the healthy development of the child. The BMI is calculated using the same formula as the BMI of adults, but is interpreted according to age. The limits of an appropriate BMI are strongly related to the child's developmental stage. If a child goes through a developmental phase sooner or later than average, a BMI that is too high or too low according to the age group may be present despite normal weight.

References: Body mass index at Wikipedia Body shape index at Wikipedia

Body Mass Calculators

BMI for age: Child and adults Childs 1 to 5 years

BMI progress charts: BMI Charts

Body mass indices: Calculation of the Body Indices

Body Mass Tables: BMI Tables BMI Index