Childrens BMI calculator APK

Children’s BMI Calculator

Purpose of the Calculator

• A Children’s Body Mass Index (BMI) calculator is a useful tool for parents, caregivers, and healthcare providers to assess whether a child’s weight is within a healthy range for their age and sex.

• The results can help identify potential concerns such as underweight, overweight, or obesity, and guide discussions about nutrition, physical activity, and overall health.

How the Calculation Works

• BMI is a number calculated from a child’s weight and height.

• For children and teenagers aged 2–20 years, BMI is interpreted differently than in adults.

• The result is compared with standardized growth charts that account for age and sex.

• The calculation provides a percentile ranking, which shows how a child’s BMI compares to other children of the same age and sex.

Why Age and Sex Matter

• Children grow at different rates, and body composition changes as they age.

• Girls and boys have different growth patterns, especially during puberty.

• Girls often experience growth spurts earlier and may accumulate body fat sooner than boys.

• For this reason, BMI-for-age charts are specific for each sex.

Steps to Ensure Accurate Measurement

• Weigh the child accurately using a reliable scale.

• Measure height with the child standing straight, without shoes.

• Record both measurements in the same units (metric or imperial).

• Input the data into the BMI calculator along with the child’s age and sex.

Understanding the Results

• Underweight: Below the 5th percentile.

• Healthy weight: 5th percentile to less than the 85th percentile.

• Overweight: 85th to less than the 95th percentile.

• Obese: 95th percentile or higher.

Important Note

• The BMI calculator is a screening tool, not a diagnostic measure.

• If your child’s BMI falls outside the healthy range, seek professional advice from a healthcare provider, who can consider other factors such as growth patterns, family history, and overall health.

FAQ

Q: How does the calculator adjust for a child’s age and sex?

A: As children grow, their body composition changes at different rates, and boys and girls follow distinct growth patterns. The calculator references age- and sex-specific BMI-for-age percentiles derived from large, representative growth studies. By plotting a child’s BMI against these percentiles, the tool provides a more accurate assessment than a one-size-fits-all adult scale.

Q: Why is it important to use percentiles rather than a fixed BMI cutoff?

A: Fixed BMI thresholds do not capture the natural growth variations that occur in childhood and adolescence. By using percentiles, the calculator places a child’s BMI in context with peers of the same age and sex. For example, a BMI in the 50th percentile means the child is right in the middle of the distribution, whereas adult cutoffs could misclassify perfectly healthy children as underweight or overweight.

Q: What measurements do I need before using the children’s BMI calculator?

A: You will need the child’s most recent weight and height, plus their exact age and sex. To ensure accuracy, weigh the child on a reliable scale and measure height with the child standing straight, shoes off, and head level. Record both measurements in the same units, whether metric or imperial, before entering them into the calculator.

Version History

v2.4——22 Dec 2025

A Children's BMI calculator gives information on the child's weight percentage. Download the latest version of Children's BMI calculator to enjoy new features and updates immediately!

*2.4

Completely remodeled app,

New features,

New design,

Bug fixing

*2.3

Bug fixing

*2.1

Bug fixing