| Infant Chart Baby Growth Charts, Graphs and Calculators |
Head Circumference for Age Percentile Growth Chart and Calculator
Infants and Babies from 0 (birth) to 3 years of age
Health Care - Pediatrician - Pediatrics - Pregnancy
Description:
This calculator provides your baby's head circumference
percentile based on age. The percentile shows how your
infant's head circumference compares to other infants.
The percentile tells you what percentage of babies measure
less than your baby. For example out of a sample of 100
babies, a percentile value of 45 percent means your baby
has a head circumference greater than 45 babies and measures
less than the other 55 babies.
A percentile of 50% represents the average or mean head
circumference. A value below 50 percent means a baby measures
less than the average. A value greater than 50 percent
means a baby is above average. A doctor or physician should
be consulted to determine head circumference status. Head
circumference can be used as a diagnoses of microcephaly,
hydrocephalus and macrocephaly.
Instructions:
The calculator requires gender (male or female), birth date of child and head circumference to entered.
Inputs:
Step |
Instructions |
Notes |
| 1 |
Select Gender |
Male for boys Female for girls |
2 |
Enter Birthday |
The date the baby was born. Select
the field to pull up a calendar or use the up and
down arrows to increment or decrement by days. |
3 |
Enter head circumference |
Enter the head circumference of
the infant. Note, the units tabs allows the change
or selection of inches (standard) or centimeters
(metric). |
4 |
Press Calculate button |
This is only needed to when the
head circumference is manually entered. |
Output |
Parameter |
Notes |
| 1 |
Percentile |
Calculated using standard normal
distribution |
2 |
Age |
Age of child in years, months
and days. |
3 |
Head Circumference |
Head circumference of the baby
in metric units of centimeters. |
4 |
Graph Plot |
Head circumference versus age
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/.
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