25th percentile head circumference in centimeters 50th percentile head circumference in centimeters 75th percentile head circumference in centimeters 90th percentile head circumference in centimeters 95th percentile head circumference in centimeters 97th percentile head circumference in centimeters 0. So a baby that is 18 inches long would be 45 7 centimeters 18 x 2 54.

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The head circumference is usually done after 13 weeks of the pregnancy.

Average head circumference newborn. The fetal head circumference or hc measures the circumference of the fetus head. Head circumference for age and weight for length percentiles name record 12 birth 3 6 9 12 15 18 21 24 27 30 33 36 52 50 48 46 44 42 40 38 36 32 cm 52 50 48 46 44 cm 20 19 18 17 16 15 14 13 in 20 19 18 in h e a d c i r c u m f e r e n c e 34 17 h e a d c i r c u m f e r e n c e age months 95 90 50 25 10 5 75 30 42 published may 30 2000. By one month that has grown to 15 inches 38 1 cm.

The baby head circumference of a healthy full term baby is between 12 5 to 13 5 inches that are 31 75 34 29 centimeters. A doctor or physician should be consulted to determine growth status. The distance around the baby s head.

The average birth weight for a full term infant is 7 lb. An average newborn will have a head circumference of about 13 inches 34 9 cm at birth assuming the baby was full term. The average newborn dimensions birth weight length and head circumference are a reflection of parental genetics maternal health during the pregnancy and position in the birth order in the family.

A value greater than 50 percent means a baby s head circumference is above average. The average newborn s head measures 13 3 4 in 35 cm generally a newborn s head is about half the baby s body length in cm plus 10 cm. The head circumference of newborn boys tends to be greater than that of newborn girls as males are born larger and grow faster than females.

There is no normal percentile range for your baby head circumference chart. Your baby will experience rapid head growth particularly during the first four months and by the end of the first year her head. Baby head circumference in boys might be slightly larger than in girls but it is still rather close within one centimeter or so.

Because boys tend to be slightly larger than girls their heads are larger though the average difference is less than 1 2 inch 1 cm. In general a newborn s head measures about 13 1 2 inches. His or her head would be about 32 9 cm or a little under 13 inches.

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. This calculator shows if your baby s head circumference is growing and progressing at a healthy rate.

What is the baby head circumference. The average newborn s head circumference measures about 13 3 4 inches 35 cm growing to about 15 inches 38 cm by one month.