What is a normal cephalic index in infants?

In newborns, the average cephalic index is approximately 79–81. Values >97 may indicate craniosynostosis (premature suture fusion) and warrant further evaluation. The index varies by population and changes slightly from birth through childhood.

Is the cephalic index used in forensic anthropology?

Yes. Cephalic index and other craniometric measurements are used in forensic anthropology to assist with biological profile estimation (ancestry, age, sex) from skeletal remains, though DNA analysis is now preferred when available.

Cephalic Index (Cranial Index) Calculator

Calculate the cephalic index = (skull breadth / skull length) × 100. Used in physical anthropology and paediatrics to classify head shape: dolichocephalic (<75), mesocephalic (75–80), brachycephalic (>80).

Data set — comma or newline separated

Statistical Results — n = 8

Count (n)8

Sum (Σx)40

Min2

Max9

Range7

Q14

Q35.5

IQR1.5

Mean (μ)5

Median4.5

Mode4

Pop. Variance (σ²)4

Pop. Std Dev (σ)2

Sample Variance (s²)4.571428571

Sample Std Dev (s)2.138089935

Skewness0.65625

Excess Kurtosis-0.21875

How to Use

Enter the values for the scenario you are assessing. Calculate the cephalic index = (skull breadth / skull length) × 100. Used in physical anthropology and paediatrics to classify head shape: dolichocephalic (<75), mesocephalic (75–80), brachycephalic (>80). Use the cephalic index result to inform your calculation.

Cephalic Index (Cranial Index) Calculator

How to Use

Frequently Asked Questions

What is a normal cephalic index in infants?

Is the cephalic index used in forensic anthropology?