Body Surface Area Calculator
Calculate body surface area (BSA) using multiple validated formulas including Mosteller, DuBois, and Haycock methods.
Input Parameters
Results
Why BSA Matters
Body Surface Area (BSA) is used in clinical medicine to calculate chemotherapy doses, burn coverage, and cardiac output. The Mosteller formula is the most commonly used due to its simplicity. Normal adult BSA is approximately 1.7–1.9 m². Always confirm drug dosing with a healthcare professional.
What is the Body Surface Area Calculator?
The Body Surface Area (BSA) Calculator estimates the total surface area of the human body. In clinical environments, BSA is a far more accurate metric than body weight for determining proper medication dosages, chemotherapy regimens, and fluid requirements.
How It Works (Formula)
There are several medical formulas to calculate BSA, but the Mosteller formula is currently the most widely used and recommended standard due to its simplicity and high clinical accuracy for both adults and children.
$$ \text{BSA (m}^2) = \sqrt{\frac{\text{Weight (kg)} \times \text{Height (cm)}}{3600}} $$
The Mosteller Formula for calculating body surface area.
How to Use It
Simply enter your patient's height (in centimeters or inches) and weight (in kilograms or pounds). The tool automatically converts the units and processes the Mosteller equation to give you an accurate BSA in square meters.