Check your baby head circumference percentile using the World Health Organization child growth standards for infants from birth to 24 months. Head circumference is measured around the widest part of the head and is an important indicator of brain growth in the first two years, which is why pediatricians record it at nearly every well visit. The percentile compares your baby measurement against a healthy reference population of the same age and sex, and as with weight and length, the trend over time matters more than any single number. This tool interpolates the WHO LMS parameters to estimate a z score and convert it into a percentile. Enter the age in months, the sex, and the head circumference in centimeters or inches to see the result. Everything is processed in your browser, and this is general information, not medical advice. A rapidly crossing or flattening curve should always be reviewed by your pediatrician.
Check your baby head circumference percentile using the World Health Organization child growth standards for infants from birth to 24 months. Head circumference is measured around the widest part of the head and is an important indicator of brain growth in the first two years, which is why pediatricians record it at nearly every well visit.
Yes. Baby Head Circumference Percentile Calculator is completely free, with no sign-up and no usage limits.
Yes. Baby Head Circumference Percentile Calculator runs in any modern web browser. There is nothing to download or install.
Yes. Baby Head Circumference Percentile Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.