Here are some ways to estimate how much of the body is burned in an adult or older child.

• The palm of the person's hand equals 1% of the body's surface area. Using the person's palm is a good way to estimate the size of a small burn.
• The total surface of the head plus the neck is 9% of the body's surface area.
• The total surface of one arm and hand is 9%.
• The chest is 9%.
• The belly is 9%.
• The upper back is 9%.
• The lower back is 9%.
• The total surface of one leg and foot is 18%.
• The groin area is 1%.