Body Surface Area Calculator

The Body Surface Area (BSA) Calculator computes body surface area from height and weight measurements. BSA is a critical metric widely used in medicine for drug dosage determination, basal metabolic rate estimation, and renal function assessment. This tool calculates BSA using three representative formulas and displays comparative results. The Du Bois formula (BSA = 0.007184 × H^0.725 × W^0.425), published in 1916, is the most classical and widely used equation. The Shintani formula (BSA = 0.007358 × H^0.725 × W^0.425) is optimized for Japanese body types and frequently used in Japanese medical practice. The Mosteller formula (BSA = √(H×W/3600)), proposed in 1987, offers a simplified calculation that can be easily computed with a basic calculator. By displaying results from all three formulas side by side, you can compare differences and select the most appropriate value for your purpose. All calculations run entirely in your browser with no personal data transmitted to any server.