Description:
This calculator provides your baby's weight percentile based on length. The percentile shows how your infant's weight compares to other infants of the same length. The percentile tells you what percentage of babies weigh less than your baby. For example out of a sample of 100 babies, a percentile value of 40 percent means your baby weighs more than 40 babies and weighs less than the other 60 babies.

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 be consulted to determine weight status.

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Instructions:
The calculator requires gender, length and weight of the child to be to entered.

Inputs:

Step	Instructions	Notes
1	Select Gender	Male for boys Female for girls
2	Enter Length	Enter the length of the infant. Note, the units tabs allows the change or selection of inches (standard) or centimeters (metric).
3	Enter Weight	Enter the weight of the infant. Note, the units tabs allows the change or selection of pounds (standard) or kilograms (metric).
4	Press Calculate button	This is only needed to when the length or weight is manually entered.

Output	Parameter	Notes
1	Percentile	Calculated using standard normal distribution
2	Length	Length of the child in centimeters.
3	Weight	Weight of the baby in metric units of kilograms.
4	Graph Plot	Weight versus length graph with 5, 10, 25, 50, 75, 95 and calculated percentile lines.

Reference:
Centers for Disease Control and Prevention (CDC). National Center for Health Statistics (NCHS). National Health and Nutrition Examination Survey Data. Hyattsville, MD: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, 2008 http://www.cdc.gov/growthcharts/.