BSA Body Surface Area Calculator

Calculate body surface area (BSA) using multiple medical formulas for accurate dosage and health assessments.

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About This Tool

This Body Surface Area (BSA) calculator helps medical professionals, researchers, and individuals calculate body surface area using four established formulas: Dubois & Dubois, Mosteller, Haycock, and Gehan & George. BSA is crucial for determining medication dosages, chemotherapy regimens, fluid requirements, and various clinical assessments. Simply enter height and weight in your preferred units, select a formula, and get instant BSA results in square meters (m²). The tool includes formula explanations, validation, and detailed result display.

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How to Use

Enter height in centimeters or inches using the appropriate unit selector.
Enter weight in kilograms or pounds using the appropriate unit selector.
Select one of the four BSA calculation formulas from the dropdown.
Click the 'Calculate BSA' button to compute your body surface area.
View results displayed in square meters with formula details and interpretation.

Frequently Asked Questions

Find Quick Answers

What is Body Surface Area (BSA) and why is it important?

Body Surface Area (BSA) is the total surface area of the human body, measured in square meters (m²). It's crucial in medicine for calculating drug dosages (especially chemotherapy), determining fluid requirements, assessing metabolic rate, and various clinical indices like cardiac index.

What are the differences between the BSA formulas?

Dubois & Dubois (1916) is the most traditional formula. Mosteller (1987) is simpler and widely used. Haycock (1978) is considered more accurate for pediatric patients. Gehan & George (1970) uses different coefficients. All formulas produce similar results for average adults, with variations for extreme body types.

What units should I use for height and weight?

You can use either metric (cm/kg) or imperial (in/lb) units. The calculator automatically converts between systems. For most accurate results, use the units you're most comfortable with - the tool handles the conversions internally.

Is this BSA calculator suitable for medical decisions?

This tool provides accurate calculations based on established formulas, but it should be used for informational and educational purposes only. Always consult healthcare professionals for medical decisions involving medication dosages or clinical assessments.

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