The "Rule of Nines" Divides the Body into Nine Areas

Question

The "rule of nines" divides the body into nine areas to estimate body surface area.

Accepted Answer

The "rule of nines" divides the body into areas that represent 9% or multiples of 9% of the total body surface area, but it includes 11 areas for adults: the head and neck (9%), each arm (9% each), each leg (18% each, front and back combined), the anterior trunk (18%), the posterior trunk (18%), and the genital area (1%).