Body Surface Area Calculator
A standard medical metric.
Body Surface Area Calculator
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Calculated instantly
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What This Calculator Does
The Body Surface Area Calculator estimates your total skin surface area using the Mosteller formula. BSA is used in medicine for drug dosing, organ function assessment, and metabolic calculations.
How It Works
BSA (m2) = sqrt(Height(cm) x Weight(kg) / 3600). It requires only height and weight and is accurate to within 3% of direct measurement methods.
Example
A person 175 cm tall weighing 70 kg: BSA = sqrt(175 x 70 / 3600) = 1.84 m2.
Formula
BSA = sqrt(H x W / 3600)Reading the Results
Body Surface Area
Your estimated total body surface area in square meters.
Frequently Asked Questions
What is BSA used for?
BSA is used in medicine for drug dosing (especially chemotherapy), cardiac output calculations, and assessing kidney function.
How accurate is the Mosteller formula?
It agrees with more complex formulas within about 1-2% for most adults.
What is a normal BSA?
The average adult BSA is 1.7 m2 for men and 1.6 m2 for women.