Body Surface Area Calculator
Calculate your Body Surface Area (BSA) using height and weight. Commonly used in medical and healthcare settings.
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How the Body Surface Area Calculator Works
Follow these simple steps to get accurate results instantly.
Enter Height
Provide your height in centimeters.
Enter Weight
Provide your weight in kilograms.
Calculate BSA
Click calculate to determine your body surface area.
View Result
See your Body Surface Area in square meters.
Mosteller Formula
BSA = √((Height × Weight) / 3600)
The Mosteller Formula is one of the most commonly used methods to estimate body surface area using height and weight.
Example Calculation
Input: Height: 170 cm, Weight: 70 kg
Output: BSA ≈ 1.82 m²
Common Uses
- • Medical Dosage Calculations
- • Chemotherapy Planning
- • Clinical Assessments
- • Healthcare Research
Frequently Asked Questions
Verified answers to essential calculation and diagnostic questions.
Average adult BSA ranges from approximately 1.6 m² to 1.9 m².
The Mosteller Formula is the most widely used method for calculating body surface area.
BSA is commonly used for medication dosing, especially in chemotherapy and pediatric medicine.
No. BMI measures body weight relative to height, while BSA estimates total body surface area.
While BMI measures weight relative to height to screen general weight categories, BSA calculates total external surface area. Clinicians prefer BSA over BMI for physiological parameters like chemotherapy dosage and cardiac index because metabolic activity correlates more accurately with surface area than body mass alone.
What Is Body Surface Area (BSA)?
Body Surface Area (BSA) is the total external surface area of the human body. It is commonly used in medicine to determine medication dosages, assess metabolic mass, and evaluate patient health.
Mosteller Formula
| Formula | Description |
|---|---|
| BSA = √((Height × Weight) / 3600) | Most commonly used BSA formula |
Average BSA Values
| Category | Average BSA |
|---|---|
| Adult Male | 1.9 m² |
| Adult Female | 1.6 m² |
| Child | Varies by age |
Uses of Body Surface Area
- Drug Dosage: Determines medication amounts.
- Chemotherapy: Cancer treatment dosing.
- Clinical Studies: Research and health assessments.
- Kidney Function: Medical evaluations.
Why Use a BSA Calculator?
A BSA Calculator provides a quick and accurate estimate of body surface area, making it useful for healthcare professionals, students, and researchers.
Written & maintained by Aditya Singh
Aditya Singh is a software engineer and the founder of DevCalc, based in Uttar Pradesh, India. He builds and maintains every calculator on this site, using standard, verified formulas — the same ones used by banks, institutions, and educators — with careful attention to accuracy. Read more about the author →
This calculator is for general informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Consult a qualified healthcare provider for health decisions.