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`BSA_"Boyd" = 0.03330 * "w" ^(0.6157 - 0.0188*log_10( "w" ))* "h" ^0.3`

Enter a value for all fields

The **Boyd Body Surface Area** calculator computes the body surface area of the human body based on a person's weight (w) and height (h).

**INSTRUCTIONS:** Choose weight and height units and enter the following:

- (
**w**) Weight of Person - (
**h**) Height of Person

**Body Surface Area (BSA):** The BSA is returned in square meters (m²). However, this can be automatically converted into other area units via the pull-down menu.

The Boyd body surface area formula is as follows:

`BSA = 0.03330⋅w^(0.6157−0.0188⋅log10(w))⋅h^0.3`

where:

- BSA = Body Surface Area
- w = Weight of Person
- h = Height of Person

BSA is used in physiology and medicine. The default input units are centimeters (cm) for height and kilograms (kg) for weight, and meters squared (m^{2}).

**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.

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 |

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 |

- 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..