BSA Calculator
Calculate body surface area using common clinical formulas such as Mosteller, Du Bois, and Haycock.
Our BSA Calculator helps you estimate body surface area in a quick clinical format. Here's how to use it:
Step 1: Enter height in centimeters.
Step 2: Enter weight in kilograms.
Step 3: Choose the formula you want to use, such as Mosteller, Du Bois, or Haycock.
Step 4: Click 'Calculate' to see the primary BSA estimate and a comparison across formulas.
The default Mosteller equation is:
BSA = sqrt(height(cm) × weight(kg) / 3600)
This calculator also compares: - Du Bois: 0.007184 × height^0.725 × weight^0.425 - Haycock: 0.024265 × height^0.3964 × weight^0.5378
All formulas estimate body surface area in square meters.
Body surface area, or BSA, is a clinical body-size estimate used in contexts such as medication dosing, chemotherapy planning, burn assessment, and physiology. Because different medical references may prefer different equations, this calculator shows multiple common formulas side by side so you can compare them quickly.
Verified Precise