The development of child crash test dummies has been slowed by the lack of available child cadavers to validate the dummies against. Information such as the head mass, head center of gravity (CG) locations and head inertial properties for children ranging in age from infant to 18-years old have not been obtained. This study examined two methods for finding the CG and inertia properties of the pediatric head and compared the two methods against each other to see if they produced the same results. One method was a mechanical method where the pediatric head was hung and swung to find the properties and the other was a CT method where a computer model was developed from CT scans and used to obtain the properties. Two pediatric post mortem human subjects (PMHSs) were imaged using CT and were dissected. The two methods were applied to each of them. The results showed that the two methods give different values for the moment of inertia (MOI), CG location and mass for both heads of pediatric PMHSs. A review of the mechanical method revealed that the pediatric sutures allowed for potentially large errors in the CG location and MOI measurements. The sutures allowed the pediatric head to change shape during the mechanical method, which adversely affected the quality of the results. However, the CT method provided a reference geometry for the CG and inertial properties and was less sensitive to error. The CT method is recommended for finding the CG and moment of inertia of the pediatric head.