Body Surface Area (BSA)

Use this Body Surface Area (BSA) Calculator to estimate your body surface area according to various formulas. This calculator allows you to compare results from different methods, including the Du Bois, Mosteller, Haycock, Gehan & George, and Boyd formulas.

What is Body Surface Area (BSA)?

Body Surface Area (BSA) is a measure of the total surface area of an individual's skin. It is commonly used in the medical field to calculate medication dosages, fluid needs, and for other clinical applications.

Formulas to Calculate BSA

There are several formulas to calculate BSA, each with its own advantages and disadvantages. Here are some of the most commonly used formulas:

  • Du Bois Formula: \( BSA = 0.007184 \times \text{Weight}^{0.425} \times \text{Height}^{0.725} \)
  • Mosteller Formula: \( BSA = \sqrt{\frac{\text{Weight} \times \text{Height}}{3600}} \)
  • Haycock Formula: \( BSA = 0.024265 \times \text{Weight}^{0.5378} \times \text{Height}^{0.3964} \)
  • Gehan & George Formula: \( BSA = 0.0235 \times \text{Weight}^{0.51456} \times \text{Height}^{0.42246} \)
  • Boyd Formula: \( BSA = 0.0003207 \times \text{Height}^{0.3} \times (\text{Weight} \times 10^3)^{0.7285 - 0.0188 \times \log_{10}(\text{Weight} \times 10^3)} \)

Other Points to Consider

Each formula has its own strengths and weaknesses, and the choice of formula often depends on the clinical context. For instance, some formulas are more suitable for children, while others may be preferred for adults.

It's also important to note that these formulas are approximations and do not replace professional medical evaluation. For any medical use, it's recommended to consult a healthcare professional.

See also

All Body Measurements Calculators
All Health Calculators