child height percentile calculator height chart for boys 2 to 20 years growth chart child from birth to 20 a height for age percentiles for 0 to cdc growth charts a height for age percentiles for 0 to height growth chart length chart for boys birth to 36 months growth chart for boys 2 to 20 years this chart shows the percentiles of a stature for age percentiles for 2 to my child is bigger than average but boys height and weight charts 0 18