Every child grows at a slightly different pace, but comparing your child's measurements against standardized growth references can help you spot patterns worth discussing at the next pediatrician visit. This tracker calculates your child's BMI and compares their current weight and height to World Health Organization median values for their exact age in months and their sex, showing you how far above or below the typical range they currently fall. It is meant as a quick reference between checkups, not a diagnostic tool, so any results that concern you — especially numbers noticeably far from the median — should always be discussed with a pediatrician who can consider the fuller picture of your child's health.