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bmi-bsa-calculator

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Calculate Body Mass Index (BMI) and Body Surface Area (BSA) for clinical assessment, obesity screening, and chemotherapy dosing. Supports multiple BSA formulas (DuBois, Mosteller, Haycock), WHO weight classification, pediatric calculations, and metric/imperial input.

When not to use

• BMI does not distinguish fat from muscle; varies by ethnicity
• All BSA formulas are approximations (10–15% variation normal)
• Not for diagnosis — BMI/BSA are tools, not clinical diagnoses
• Standard formulas inaccurate for amputees; special considerations for pregnancy

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