Rule of Fives

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Equation / Last modified by pro on 2017/07/10 18:07
`BSA % = `
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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, .Rule of Five.jpg 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:

  • (2%) Entire head
  • (5%) Complete left arm
  • (5%) Complete right arm
  • (50%) Trunk
  • (20%) Complete left leg
  • (20%) Complete right leg
References:
Dedication
  • For my Scout.