Institute for Surgery

Body Surface Area (BSA) Calculator

Calculate Body Surface Area using the Mosteller formula.

Clinical Context

BSA is utilized in clinical practice to calculate doses of chemotherapeutic agents and glucocorticoids, and to index cardiac output (Cardiac Index). The Mosteller formula is widely accepted as the simplest and most commonly used method in modern practice.

Assumptions & Caveats

  • Calculators are aids, not substitutes for clinical judgement.
  • Scores must be correlated with patient history and imaging where appropriate.
  • Not validated for pediatric populations under 12 years unless explicitly stated.

Documentation

Values and thresholds based on primary literature.

Read Methodology

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