What is the percentage of the head for an infant or toddler?

For infants and toddlers, the head accounts for approximately 18% of their total body surface area when assessed using the "Lund and Browder" chart, which is a more accurate tool than the "Rule of Nines" often used for adults. This percentage reflects the proportionately larger size of the head relative to the rest of the body in younger children compared to adults. Understanding this percentage is crucial in emergency medicine, particularly for calculating fluid resuscitation in burn patients or assessing trauma, as incorrect estimations can lead to inadequate or excessive treatment. In this context, the correct percentage of 18% is essential for providing appropriate care in pediatric patients.