🔍 /

Body Surface Area (BSA) Multi-Formula Calculator

Calculate Body Surface Area using Du Bois, Mosteller, Haycock, and more. Essential for oncology dosing and cardiac indexing.

User Rating 0.0 ★★★★★
Total Usage 0 times
Category Medicine & Tests
Is this tool helpful?

Your feedback helps us improve.

★ ★ ★ ★ ★

About

Body Surface Area (BSA) is a more accurate indicator of metabolic mass than body weight alone, making it the gold standard for calculating chemotherapy dosages (mg/m²) and indexing cardiac output. Inaccuracies here can lead to toxicity or under-dosing. Because different medical institutions standardize on different algebraic models, this tool computes the BSA using the five most clinically validated formulas simultaneously. This redundancy allows practitioners to cross-verify results against hospital protocols instantly.

bsa body surface area medical calculator oncology chemotherapy

Formulas

All formulas use Weight (W) in kg and Height (H) in cm. Result is in m².

Mosteller (Most Common):

BSA = √H × W3600

Du Bois & Du Bois:

BSA = 0.007184 × W0.425 × H0.725

Haycock:

BSA = 0.024265 × W0.5378 × H0.3964

Reference Data

DemographicAverage Weight (kg)Average Height (cm)Typical BSA (m²)
Neonate3.5500.24
Child (2 years)12870.55
Child (10 years)321381.10
Adult Woman651631.70
Adult Man751771.90
Large Adult1001852.25

Frequently Asked Questions

There is no single "correct" formula. The Du Bois formula has been the standard for decades, but the Mosteller formula is now widely adopted due to its simplicity and ease of calculation while maintaining similar accuracy. Always follow your institution's specific protocol.
BMI (Body Mass Index) measures adiposity (fatness), whereas BSA (Body Surface Area) correlates better with metabolic rate, blood volume, and kidney function. This makes BSA superior for determining drug clearance rates in chemotherapy.
Yes. The Haycock and Boyd formulas are often preferred for infants and children as they handle low body weights more accurately than Du Bois. However, Mosteller is generally accepted for all age groups.
The calculator includes a toggle to switch units. If you select "lb/in", the system internally converts values to "kg/cm" before processing the formulas to ensure mathematical consistency.