This evidence-based calculator determines your child's height, weight, and BMI percentiles based on age and gender. Use this tool to track growth patterns, compare to national standards, and understand your child's development.
Medical Disclaimer: This tool provides general educational estimates. Consult your pediatrician for personalized growth tracking.
Want to learn more about growth prediction accuracy and methods? Explore our height prediction methods analysis →
Follow these steps to calculate your child's growth percentiles based on CDC and WHO growth standards:
Results are based on CDC growth charts for children 2-20 years and WHO growth standards for children under 5. This tool helps monitor growth patterns over time, but should not replace regular pediatric check-ups.
A growth percentile indicates how your child's measurements compare to other children of the same age and gender. For example, if your child is in the 75th percentile for height, it means they are taller than 75% of children their age. Percentiles help pediatricians track whether children are growing in a healthy pattern relative to their peers.
Most pediatricians measure growth at every well-child visit, which typically occurs more frequently during infancy (2-4 months) and spaces out to annual visits for older children. For home monitoring, checking every 3-6 months is reasonable. What's most important is tracking the pattern over time rather than focusing on a single measurement.
In the United States, the American Academy of Pediatrics recommends using WHO growth standards for all children under 2 years of age and CDC growth charts for children 2-20 years old. The WHO charts better represent optimal growth for younger children, while CDC charts better reflect the U.S. population for older children. This calculator automatically applies the appropriate standards based on your child's age.
Not necessarily. What's most important is that your child follows a consistent growth curve over time, not their specific percentile. Some children are naturally smaller or larger based on genetics. However, significant drops or jumps across percentile lines (crossing two or more major percentile lines) may warrant discussion with your pediatrician, as might consistently being below the 3rd or above the 97th percentile.
Online calculators like this one use standard growth data from reliable sources like the CDC and WHO, but they provide estimates rather than clinical assessments. Factors affecting accuracy include measurement precision, data input accuracy, and individual variations not captured by standardized charts. Always discuss results with a healthcare provider, especially if you have concerns about your child's growth.