What is a normal head circumference percentile?

A percentile of 50% represents the average or mean head circumference. A value below 50 percent means a baby’s head circumference is less than the average. A value greater than 50 percent means a baby’s head circumference is above average. A doctor or physician should be consulted to determine growth status.

What is normal baby head circumference?

Your baby’s head will grow at its fastest rate during the first 4 months after birth than at any other time. This increase is due to rapid brain growth. The average head circumference at birth is about 13.5 in. (34.5 cm).

What is the average head circumference at 36 months?

Females, Birth – 36 Months. Age (in months) 3rd Percentile Head Circumference (in centimeters) 5th Percentile Head Circumference (in centimeters) 10th Percentile Head Circumference (in centimeters) 25th Percentile Head Circumference (in centimeters) 50th Percentile Head Circumference (in centimeters)

How to calculate the head circumference of a child?

Percentile – The weight percentile of the child. Head Circumference – The head circumference of the child in metric and standard units. Graph Plot – Weight versus age graph with 5, 10, 25, 50, 75, 95 and calculated percentile lines.

What does the percentile mean for head circumference?

Description: 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 head circumference. A value below 50 percent means a baby’s head circumference is less than the average.

What kind of tape measure do you use to measure head circumference?

Measurement should be done using a strong flexible tape measure, though a paper tape measure may be used until an infant has substantial hair. Macrocephaly usually denotes a head circumference greater than the 97th percentile. Enter the head circumference in the program at the top of this page to calculate the percentile.