Body Surface Area Calculator
Calculate your BSA using different formulas
Body Surface Area Results
BSA
0
square meters
Formula Used
Mosteller
√(height × weight / 3600)
Note: Body Surface Area is used in medical calculations for drug dosages, fluid requirements, and metabolic measurements. Different formulas may produce slightly different results.
Understanding Body Surface Area: A Medical Guide
Our Body Surface Area Calculator helps you determine your BSA – an important measurement used in medical practice for calculating drug dosages, fluid requirements, and metabolic measurements.
Did you know? Body Surface Area is considered more accurate than body weight alone for many medical calculations because it better correlates with metabolic rate.
How to Use the BSA Calculator
To use the calculator, simply enter your information:
- Height: Your height in centimeters
- Weight: Your weight in kilograms
- Formula: Select from three common BSA calculation methods
Click “Calculate BSA” to get your body surface area in square meters!
Key BSA Formulas Explained
Our calculator supports three widely used formulas:
- Mosteller Formula:
- Most commonly used in clinical practice
- Simple to calculate: √(height × weight / 3600)
- Considered accurate for most populations
- Du Bois Formula:
- One of the earliest BSA formulas (1916)
- 0.007184 × height0.725 × weight0.425
- Still widely referenced in medical literature
- Haycock Formula:
- Developed specifically for pediatric patients
- 0.024265 × height0.3964 × weight0.5378
- Also works well for adults
Why Calculate Body Surface Area?
BSA is used in many medical applications:
- Medication Dosing: Chemotherapy, antibiotics, and other drugs
- Fluid Requirements: Calculating IV fluid needs
- Burn Assessment: Estimating percentage of body burned
- Metabolic Studies: Normalizing metabolic rate measurements
- Cardiac Index: Calculating cardiac output per square meter
Our BSA Calculator provides accurate estimates using multiple formulas to meet different clinical needs.