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`BSA % = "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, [Private Equation].
*Burn Percentage*

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

**Body Surface Area (BSA)** is the measured or calculated surface area of a human body frequently used in physiology and medicine. For many clinical purposes BSA is a better indicator of metabolic mass than body weight because it is less affected by abnormal adipose mass. Estimation of BSA is simpler than many measures of volume.

BSA Calculators vs Inputs |
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Method |
Height | Weight | Gender |

Mosteller | x | x | |

Gehan and George | x | x | |

Boyd | x | x | |

DuBois | x | x | |

Haycock | x | x | |

Fujimoto | x | x | |

Takahira | x | x | |

Schlick | x | x | x |

Costeff | x | ||

Wang Hihara | x | x |

Age Range | Male | Female |
---|---|---|

Neonate | 0.243 m² | 0.234 m² |

2 years old | 0.563 m² | 0.54 m² |

5 years old | 0.787 m² | 0.771 m² |

10 years old | 1.236 m² | 1.245 m² |

13 years old | 1.603 m² | 1.55 m² |

18 years old | 1.98 m² | 1.726 m² |

20 to 79 years old | 2.06 m² | 1.83 m² |

80 and above | 1.92 m² | 1.638 m² |

- Mosteller formula Body Surface Area Calculator
- Gehan and George formula Body Surface Area Calculator
- Boyd formula Body Surface Area Calculator
- DuBois formula Body Surface Area Calculator
- Haycock formula Body Surface Area Calculator
- Fujimoto formula Body Surface Area Calculator
- Takahira formula Body Surface Area Calculator
- Costeff formula Body Surface Area Calculator
- Wang Hihara Body Surface Area Calculator
- Schlick Body Surface Area Calculator
- Body Surface Area Comparison with Averages

- The BSA Compare function lets you enter a body surface area and choose a demographic (above) to compute the percent compared to the mean.
- Wallace Rule of Nines: This computes a percentage of the human body for burn victims based on percentages allocated to different body parts.
- Rule of Fives: This computes a percentage of the human body for obese burn victims.
- Parkland Replacement Fluid: This compute the volume of replacement fluids needed in the first 24 hours based on the patients weight (mass) and the percent of their body that has been burned.
- BSA Percent: This computes a body surface area based on the total body surface area and a percent..

- Image of Human Body from OpenStax College. Used through CC 3.0. Source Anatomy & Physiology, Connexions Web site. http://cnx.org/content/col11496/1.6/, Jun 19, 2013.

- For my Scout.