BSA Calculator (Body Surface Area)
Calculate Body Surface Area (BSA) using Mosteller, DuBois & DuBois, Haycock, and Boyd formulas. Essential for chemotherapy dosing, fluid management, and metabolic assessment.
Step 1: Patient Measurements
Why BSA matters
Body Surface Area is used in chemotherapy drug dosing, cardiac output measurements, and renal function assessments (e.g., Cockcroft-Gault equation). It’s often more accurate than weight alone.
Step 2: Formula Selection
Formula notes
Mosteller: √(height·weight/3600) — metric.
DuBois: 0.007184·H0.725·W0.425.
Haycock: 0.024265·H0.3964·W0.5378.
Boyd: 0.0003207·H0.3·W(0.7285-0.0188·logW).
BSA Calculation Results
Primary BSA (Mosteller)
Detailed formula comparison
Interpretation
Typical adult BSA ranges from 1.6 to 2.0 m². Values above 2.5 m² may indicate obesity; below 1.3 m² often seen in children or underweight adults. Always use clinical judgment.
Clinical applications & references
BSA in medicine
• Chemotherapy: many cytotoxic drugs are dosed per m².
• Glomerular filtration rate (GFR) is often indexed to 1.73 m².
• Cardiac output (cardiac index = CO/BSA).
• Burn fluid resuscitation (Parkland formula uses BSA).
Always consult a physician before clinical decisions.
Always consult a healthcare professional
This BSA calculator is for educational and planning purposes. Treatment decisions must be made by qualified medical practitioners.
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