# Rule of Fives

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The Rule of Fives calculator computes the percent of a Body Surface Area that is burned based on the Rule of Fives often used for obese patients.

INSTRUCTIONS:  Enter the following:

• (H)  Indicate the portion of the head burned: None, Quarter, Half, Three Fourths, Complete
• (LA)  Indicate the portion of the left arm burned: None, Quarter, Half, Three Fourths, Complete
• (RA)  Indicate the portion of the right arm burned: None, Quarter, Half, Three Fourths, Complete
• (T)  Indicate the portion of the chest burned: None, Quarter, Half, Three Fourths, Complete
• (LL)  Indicate the portion of the left leg burned: None, Quarter, Half, Three Fourths, Complete
• (RL)  Indicate the portion of the right leg burned: None, Quarter, Half, Three Fourths, Complete

Percent BSA:  The calculator returns the percent of the burned Body Surface Area.

Related Calculators:

• To compute the Replacement Fluid Requirement for a burn victim using the Parkland Formula, CLICK HERE.
• To compute the Body Surface Area using the Mosteller, Gahan and George, Boyd, DuBois, Haycock, Fujimoto, Takahira or Wang Hihara formulas, . Burn Percentage

### Burn Surface Area

The Rule of Fives can be used to approximate the percent of a patient that is burned.   It applies a percent of Body Surface Area, and differs from the Wallace Rule of Nines and often used for obese patients.  It applies a larger portion of the body surface area to the trunk and legs as follows: