Body Surface Area (BSA) Calculator

This on-line BSA calculator takes your height and weight and calculates the body surface area in m². You have the option to select the formula you want the BSA to be calculated.

Using the BSA calculator

1. Enter your Height either in centimeters or in feet.
2. Enter your Weight either in kilograms or pounds.
3. Then, click the Calculate BSA button. The body surface area will be calculated and the result will be displayed in the box below the button.

There are several formulas to calculate human body surface area. The popular once are Du Bois and Mosteller. Body surface area is mainly used for clinical purposes like medicine dosage calculations, etc...

Formulas To Calculate Body Surface Area

1. Du Bois Formula:

BSA = Wt^0.425 x Ht^0.725 x 0.007184

2. Mosteller Formula:

BSA = Wt^0.5 x Ht^0.5 x 0.016667

3. Haycock Formula:

BSA = Wt^0.5378 x Ht^0.3964 x 0.024265

4. Gehan and George Formula:

BSA = Wt^0.51456 x Ht^0.42246 x 0.0235

5. Boyd Formula:

BSA = Wt^{(0.6157 - 0.0188 log₁₀ Wt)} x Ht^0.3 x 0.0333

6. Fujimoto Formula:

BSA = Wt^0.444 x Ht^0.663 x 0.008883

7. Takahira Formula:

BSA = Wt^0.425 x Ht^0.725 x 0.007241

8. Schlich Formula

BSA for Women= Wt^0.46 x Ht^1.08 x 0.000975482

BSA for Men= Wt^0.38 x Ht^1.24 x 0.000579479

For all the above formulas:

• BSA = Body Surface Area in m².
• Ht = Height in Meters (m).
• Wt = Weight in kilograms (Kg).

• A formula to estimate the approximate surface area...
• "Simplified calculation of body-surface area" by Mosteller RD
• Haycock GB