Easily calculate your child’s body mass index (BMI) with our user-friendly calculator. Input your child’s height, weight, age, and gender to get their BMI and determine if they are in a healthy weight range for their age. Start promoting your child’s health and wellness with our children’s BMI calculator today.

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.

BMI introduction

You can use a BMI calculator to calculate your BMI based on a formula related to your age and your weight. Use the SI Units or Other Units tab to convert the units to US or metric units. The calculator takes into account BMI and Body Mass Index as listed below.

BMI chart for adults

Centers for Disease Control and Prevention (CDC) growth chart.

BMI table for children and teens, age 2-20

Limitations of BMI

Although BMI is a useful and widely used indicator of healthy weight, it has its limitations. BMI is a statistic that does not take body composition into account. For body types in addition to muscle mass, BMI should be considered along with other measures of bone mass and fat distribution. Instead, it is used as the only way to determine a healthy weight.

In adults:

An adult’s BMI, which measures excess body fat, may not be completely accurate. BMI is influenced by other factors such as age, gender, race, and muscle mass. Body fat and activity levels. They may not gain weight, but they also gain body fat. It is considered unhealthy. Young people with high muscle mass are considered healthy with a healthy BMI, and health is perceived as good in athletes and especially bodybuilders. It is considered overweight because it contains more muscle than fat. Indeed, their weight is likely to be appropriate for the anatomy. In general, according to the Centers for Disease Control and Prevention (CDC):

  • Older adults have more body fat than younger adults with a normal BMI.
  • Women have more body fat per BMI than men.
  • Muscular individuals and well-trained athletes may have higher BMIs due to their muscle mass.

In children and adolescents:

The limiting effect of BMI in adults is also evident in children and adolescents. In addition, the length and degree of sexual maturation may influence children’s BMI and body fat. BMI is a better predictor of adiposity in obese children than in underweight or obese children. (All body parts except fat, water, organs, muscles, etc.) The difference in BMI in an overweight child can be due to fat mass.

BMI is a valid indicator of body fat for 90–95% of the population and can be used effectively in conjunction with other measures.

Ponderal Index

Body mass index (PI) is similar to BMI. It measures the index of overweight or obesity based on height and weight. The main difference between PI and BMI is that the cubes represent the square of height in the soup (below). Despite the limitations of such studies, the PI is more reliable for use in taller or shorter individuals. However, unspecified levels of body fat and BMI are in the same order of magnitude as tall people who are overweight or underweight. The following equations are used to calculate a person’s PI for USC using a 5’10 (ca. 178 cm) 160 pound (ca. 73 kg) person.:

Ponderal Index

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