Body mass index BMI is one way to estimate a person's body fat that takes into consideration the person's height. BMI is calculated using a person's weight and height. In children and teens, BMI is used to find out if a child or teen is underweight, of a healthy weight, overweight, or obese. A child's body fat changes with age. Also, girls and boys differ in their amount of body fat as they mature.
Because of possible rounding errors in age, weight, and height, the results from this calculator may differ slightly from BMI-for-age percentiles calculated by other programs. Birth Date must be at least 2 years before Date of Measurement. If the child is under 2 years old, BMI cannot be calculated. Consult a healthcare provider for assessment.
For years, doctors have used height and weight measurements to assess a child's physical growth in relation to other kids the same age. Now they have another tool: body mass index BMI. BMI is a calculation that uses height and weight to estimate how much body fat someone has. Doctors use it to determine how appropriate a child's weight is for a certain height and age.
For children and teens, a high Body Mass Index can lead to weight-related diseases, while being underweight can also put a child at risk of health issues. Unlike adults, in children and teens BMI is age- and gender-specific. After the BMI is calculated, it is expressed in relation to a percentile a child fits into according to their age group and gender. Find out if your child is in a healthy BMI range using the calculator below.