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Infant Growth Percentile Calculator - New Born to 36 Months

  • Published: 2011-02-07 (Revised/Updated 2016-11-05) : Author: Disabled World : Contact: Disabled World
  • Synopsis: Baby growth percentile calculator to obtain an infants weight and height percentile in comparison to a national average.

Main Document

"A baby born within the normal range of mass for that gestational age is known as appropriate for gestational age (AGA)."

Doctors often use a percentile calculator to assess an infant's weight and height percentile in comparison to national averages.

What Does Percentile Mean

In statistics and the social sciences, a percentile (or centile) is the value of a variable below which a certain percent of observations fall. For example, the 20th percentile is the value (or score) below which 20 percent of the observations may be found. The term percentile and the related term percentile rank are often used in the reporting of scores from norm-referenced tests.

How much does your baby weigh? And how does that weight compare to other babies? A Growth Percentile Calculator makes it easy to keep track of your child's growth and weight measurements as it can determine the percentiles for all children ages birth to 3 years old. For children ages 2 to 19 years you will need to use our our Child Percentile Calculator.

By using a Growth Percentile Calculator at home you can easily judge if your infant growing adequately and he or she is gaining weight and height at the normal rate. A percentile chart gives parents a good idea concerning how their baby's developmental progress compares with other babies nationwide of a similar age.

Typical growth percentiles for infants include the following:

A percentile of 50% represents the average or mean weight. A value below 50 percent means a baby weighs less than the average. A value greater than 50 percent means a baby is above average. This does not mean your baby is overweight or underweight. A doctor or physician should always be consulted to determine weight status.

Birth mass is the mass of a baby at its birth. It has direct links with the gestational age at which the child was born and can be estimated during the pregnancy by measuring fundal height. A baby born within the normal range of mass for that gestational age is known as appropriate for gestational age (AGA). Those born above or below that range have often had an unusual rate of development - this often indicates complications with the pregnancy that may affect the baby or its mother.

This calculator provides your baby's weight percentile based on age, enter your infant's measurements into the Growth Percentile Calculator below to obtain all their percentiles based on infant growth charts. For example out of a sample of 100 babies, a percentile value of 45% means your baby weighs more than 45 babies and weighs less than the other 55 babies.

Infant Growth Percentile Calculator
Enter the Following Information:
Gender of Baby
Age of Baby in Months months
Body Weight
Body Length
Head Circumference
Calculation Results
Length for age is in the percentile
Weight for age percentile is
Weight for length percentile
Head circumference for age percentile
Automatic recalculation

Infant Growth Percentile Calculator provided by

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