Baby Weight & Length Percentile Calculator

Growth percentiles compare your baby's measurements to other children of the same age and sex. For example, if your baby is at the 75th percentile for weight, 75% of babies the same age and sex weigh less than your baby.

Any percentile from the 3rd to the 97th is considered within the normal range. What matters most is that your baby follows a consistent growth curve over time. Sudden jumps or drops across percentile lines may warrant evaluation.

This calculator uses approximate WHO growth standards, which are recommended for children 0-24 months in the United States and internationally. The WHO standards describe how children should grow under optimal conditions.