The front and back of the head and neck are 21% of the body's surface area.
The front and back of each arm and hand are 10% of the body's surface area.
The chest and stomach are 13% of the body's surface area.
The back is 13% of the body's surface area.
The buttocks are 5% of the body's surface area.
The front and back of each leg and foot are 13.5% of the body's surface area.
The groin area is 1% of the body's surface area.
The "rule of palm" is another way to estimate the size of a burn. The palm of the person who is burned (not fingers or wrist area) is about 1% of the body. Use the person's palm to measure the body surface area burned.
It can be hard to estimate the size of a burn. If you think a burn is a certain size but you are unsure, it is best to discuss the size of the burn with your doctor.
ByHealthwise Staff Primary Medical ReviewerWilliam H. Blahd, Jr., MD, FACEP - Emergency Medicine Adam Husney, MD - Family Medicine Kathleen Romito, MD - Family Medicine Specialist Medical ReviewerH. Michael O'Connor, MD, MMEd, FRCPC - Emergency Medicine Martin J. Gabica, MD - Family Medicine
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