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Body Metrics

Body Surface Area Calculator

Calculate total external surface area of the human body using Mosteller and Du Bois equations

Input Parameters
Real-time calculation updates dynamically as you adjust inputs. Values remain strictly local on your device.
Body Surface Area (Mosteller)Clinical Standard
1.84m²

Normal adult average is approximately 1.7 to 2.0 m²

Du Bois Formula
1.85m²
Consensus Average
1.85m²
Clinical Responsibility Note: This calculation provides statistical estimations for informational and educational purposes only. It is not an individualized medical diagnosis or clinical prescription.

Mathematical Formula & Scientific Methodology

Formula: Mosteller BSA Equation

BSA = √[(height (cm) × weight (kg)) / 3600]

Published by Dr. R.D. Mosteller in 1987 in the New England Journal of Medicine, simplifying the historic Du Bois allometric equation.

Model Assumptions

  • Adult geometric proportion

Variables & Standard Units

SymbolPhysiological MeaningUnit
heightStanding heightcm
weightBody weightkg

Scientific Limitations

  • Extreme anatomical variations may exhibit ±5% variance

Peer-Reviewed Scientific Citations

Simplified calculation of body-surface area (1987)

Mosteller RD (1987) — The New England Journal of Medicine, 317(17), 1098

Key Finding: Square root formula BSA = sqrt(height_cm * weight_kg / 3600), clinically equivalent to Du Bois but vastly simpler and less error-prone.

A formula to estimate the approximate surface area if height and weight be known (1916)

Du Bois D, Du Bois EF (1916) — Archives of Internal Medicine, 17(6), 863-871

Key Finding: Classical allometric surface area formula: BSA = 0.007184 * W^0.425 * H^0.725.

Frequently Asked Questions

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