Body Surface Area Calculator
Calculate body surface area using the DuBois formula
About this calculator
A Body Surface Area Calculator estimates the total surface area of your body using the widely-accepted DuBois formula, which factors in your height and weight. This measurement is crucial in medical settings for determining proper medication dosages, chemotherapy treatments, and burn assessments. Healthcare professionals rely on BSA calculations to ensure accurate treatment protocols, as body surface area provides a more precise measurement than weight alone for dosing medications and evaluating metabolic functions.
How to use
Enter your height in either centimeters or feet/inches and your weight in kilograms or pounds. The calculator will automatically apply the DuBois formula (BSA = 0.007184 × height^0.725 × weight^0.425) to determine your body surface area in square meters. Results are displayed instantly for medical reference.
Frequently asked questions
What is the DuBois formula and why is it used?
The DuBois formula is the most widely accepted method for calculating body surface area, established in 1916 and still considered the gold standard in medical practice.
What is a normal body surface area range?
Average adult BSA ranges from 1.6-2.0 m² for most individuals, though this varies significantly based on height, weight, age, and gender.
Why do doctors use BSA instead of just weight?
BSA provides more accurate dosing for medications and treatments because it better reflects metabolic mass and physiological processes than weight alone.