The average adult human head weighs between 10 and 11 pounds (4.5 and 5 kilograms). This includes the skull, brain, skin, muscles, and other tissues. Variations occur due to factors such as age, sex, and overall body size. For infants and children, the weight is proportionally larger compared to their body size, influencing their development and balance.
Understanding typical head weight is crucial in various fields. In medicine, this knowledge aids in diagnosing conditions related to head growth and trauma. Engineering applications, particularly in safety design, utilize this information for creating protective equipment like helmets and headrests. Furthermore, anthropological studies examine head size and weight across different populations, offering insights into human evolution and diversity.