Baby Growth Percentile Calculator
Approximate weight percentile for a baby's age, based on WHO growth medians.
months
Formula: Approximation using WHO weight-for-age medians (0–36 months)
Worth Knowing
A growth percentile places your baby's weight against a reference population — the 50th percentile is the median, and being at the 20th or 80th is perfectly normal. What pediatricians watch is the trend: a baby who tracks steadily along their own curve is usually thriving even at a low percentile, whereas a sudden jump across percentile lines is what prompts a closer look. This tool uses WHO median data as an approximation and is no substitute for plotted clinical growth charts.
How to Use
- Enter Baby's gender into the first field of the Baby Growth Percentile Calculator.
- Fill in the rest: Baby's age, Baby's weight.
- Your result appears instantly as you type — there's no submit button or page reload.
Formula
Approximation using WHO weight-for-age medians (0–36 months)