Birth Weight Percentile Calculator
Birth Weight Percentile
Determine the birth weight percentile of a newborn based on weight, gestational age, and sex
grams
weeks
Formula
Percentile = Normal Distribution of (Birth Weight - Mean for GA and Sex) / Standard Deviation
Frequently Asked Questions
What is a normal birth weight range?
A normal full-term birth weight is generally between 2,500 and 4,000 grams (5.5 to 8.8 pounds). Babies below 2,500 grams are considered low birth weight.
Does birth weight differ between males and females?
Yes, male newborns tend to weigh slightly more than female newborns on average, typically by about 100 to 150 grams at the same gestational age.