Body Surface Area Calculator
Body Surface Area (BSA) Calculator
The Body Surface Area (BSA) Calculator estimates the total surface area of the human body using weight and height. It is commonly used in medical settings such as drug dosing and clinical assessments.
What is Body Surface Area (BSA)?
Body Surface Area is the measured or calculated total surface area of a human body. It is used in medicine as a more accurate indicator of metabolic mass than body weight alone.
Why is BSA Important?
- Used for chemotherapy dosing
- Helps calculate cardiac index
- Estimates metabolic activity
- More accurate than body weight in some cases
Average Body Surface Area Values
- Newborn child: 0.25 m²
- 2-year-old child: 0.5 m²
- 10-year-old child: 1.14 m²
- Adult female: 1.6 m²
- Adult male: 1.9 m²
Common BSA Formulas
Du Bois Formula
BSA = 0.007184 × W0.425 × H0.725
Mosteller Formula
BSA = √((Height × Weight) / 3600)
Haycock Formula
BSA = 0.024265 × W0.5378 × H0.3964
Gehan and George Formula
BSA = 0.0235 × W0.51456 × H0.42246
Medical Uses of BSA
- Chemotherapy dosage calculation
- Cardiac function measurement
- Kidney and metabolic studies
Limitations of BSA
- Less accurate at extreme body sizes
- May not reflect body composition
- Not suitable as a sole health indicator
Why BSA is Used Instead of Weight
BSA gives a better estimate of metabolic mass compared to body weight because it considers both height and weight together.
Frequently Asked Questions (FAQs)
What is normal BSA?
Average adult BSA is around 1.6 m² for females and 1.9 m² for males.
Is BSA important in medicine?
Yes, it is widely used for drug dosing and clinical calculations.
Which formula is most accurate?
The Du Bois and Mosteller formulas are most commonly used in clinical practice.
Can BSA replace BMI?
No, BSA and BMI measure different aspects of body composition.
References
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