# Body Surface Area Calculator

This Body Surface Area (BSA) Calculator helps you estimate the body surface area based on body weight and height. The calculator employs the most well-known equations to calculate BSA.

• 1. Select your measurement system (imperial or metric)
• 2. If needed, select your gender
• 3. Enter your current weight and height
• 4. Select the equation you would like to use
• 5. Click on the "Calculate" button to observe the results.
BSA Calculator

Results
Estimated Body Surface Area (BSA) =
Average Body Surface Area Values
Child (12-13 years) 1.33 m2
Child (10 years) 1.14 m2
Child (9 years) 1.07 m2
Child (2 years) 0.5 m2
Neonate 0.25 m2

You may also be interested in our Free Online Body Shape Calculator

## Formulas

The equations to compute BSA are listed below:

### The Du Bois equation

BSA [m2] = 0.007184 × weight[kg] 0.425 × height[cm] 0.725

### The Mosteller equation

BSA [m2] = 0.016667 × weight[kg] 0.5 × height[cm] 0.5

### The Haycock equation

BSA [m2] = 0.024265 × weight[kg] 0.5378 × height[cm] 0.3964

### The Gehan & George equation

BSA [m2] = 0.0235 × weight[kg] 0.51456 × height[cm] 0.42246

### The Boyd equation

BSA [m2] = 0.03330 × weight[kg] (0.6157 - 0.0188 × log10(weight[kg])) × height[cm] 0.3

### The Takahira equation

BSA [m2] = 0.007241 × weight[kg] 0.425 × height[cm] 0.725

### The Schlich equation

Women: BSA [m2] = 0.000975482 × weight[kg] 0.46 × height[cm] 1.08
Men: BSA [m2] = 0.000579479 × weight[kg] 0.38 × height[cm] 1.24