BMI calculator for children

BMI for children is calculated differently because their body composition changes as they grow. 

BMI calculator for children

Body Mass Index (BMI) is a measure of body fat based on a person’s weight and height. It is commonly used to determine whether an adult is underweight, normal weight, overweight or obese. However, BMI for children is calculated differently because their body composition changes as they grow.

BMI Calculator
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Please enter value between 0 and 19 years.
Please enter value between 40 and 225.
Please enter value between 10.0 and 250.0 ( one decimal ).
Calculate BMI
Use this calculator to check your body mass index (BMI), which can be a helpful tool in determining your weight category. Or, use it to calculate your child’s BMI.

To calculate BMI for children, you need to use their age, gender, weight, and height. The following steps can guide you on how to calculate BMI for children:

Step 1: Measure the child’s weight Measure the child’s weight in kilograms (kg) or pounds (lbs) using a calibrated scale.

Step 2: Measure the child’s height Measure the child’s height in centimeters (cm) or inches (in) using a measuring tape or stadiometer.

Step 3: Determine the child’s BMI percentile After obtaining the child’s weight and height, you can calculate their BMI using the following formula:

BMI = weight (kg) ÷ height^2 (m^2)

Note: If you measured height in inches, divide the result by 39.37 to convert to meters.

The resulting BMI value should be plotted on a BMI-for-age growth chart to determine the child’s BMI percentile. The BMI percentile indicates where the child falls compared to other children of the same age and gender.

Step 4: Interpret the results The BMI-for-age percentile is interpreted as follows:

  • Less than the 5th percentile: Underweight
  • 5th percentile to less than the 85th percentile: Normal weight
  • 85th percentile to less than the 95th percentile: Overweight
  • Equal to or greater than the 95th percentile: Obese

It’s important to note that BMI is just one factor in determining a child’s overall health. A healthcare professional should be consulted to interpret the results and provide recommendations for any necessary interventions.

We Help You Stay Healthy

Use a BMI Chart or Body Mass Index Chart to find your healthy weight.

The BMI formula is used for men, women and children. For children there are other BMI values than for adults. For adults the Body Mass Index is based on your weight and height and it tells you whether you have a healthy body weight.

BMI calculator

A BMI (body mass index) calculator is a tool that helps individuals determine their overall body mass index, which is a measure of body fat based on a person's weight and height. BMI is an important factor in assessing an individual's health and can be used as a screening tool to identify potential weight-related health problems.

BMI chart

A BMI chart is a useful tool for individuals to quickly and easily assess their body mass index (BMI) score, which is a measure of body fat based on their weight and height. Using a BMI chart can help individuals determine if they are in a healthy weight range or if they may be at risk for weight-related health problems.

Using a BMI chart is an easy way to assess your weight status.

By simply entering your height and weight into the calculator or looking up your height and weight on the chart, you can determine your BMI score and see which weight category you fall into.