Body Surface Area (BSA)
1.87
m²
Mosteller formula (default)
Patient Data Input
cm
Adjust using slider or enter exact value
kg
Adjust using slider or enter exact value
years
BSA Formula Selection
Real-time BSA Results
BMI
24.22
kg/m² (Normal weight)
BSA in cm²
18700
Centimeters squared
Tool Actions
Calculation History
| Date | Height | Weight | BSA | Formula | Action |
|---|
No calculations saved yet. Your history will appear here.
About BSA
Body Surface Area (BSA) is the measured or calculated surface area of a human body. It is used in many medical measurements, including:
- Drug dosage calculations
- Chemotherapy regimens
- Glomerular filtration rate (GFR)
- Cardiac index calculation
- Burn assessment
Normal BSA range: 1.6 - 1.9 m² for adults
Formula Details
Mosteller Formula (default)
BSA (m²) = √[height(cm) × weight(kg) / 3600]
Simplest and most commonly used formula in clinical practice.
Quick Reference
Tip: Click on any formula card to make it the default for calculations.
Note: This tool is for informational purposes only. Always consult a medical professional for clinical decisions.
Understanding Body Surface Area: A Comprehensive Guide
Body Surface Area (BSA) is a critical measurement in healthcare, used for determining correct medication dosages, assessing metabolic mass, and evaluating various physiological parameters. This guide will help you understand how to use our Body Surface Area Calculator effectively.
How to Use This BSA Calculator
Our real-time BSA calculator provides instant results as you input patient data:
- Select your measurement system - Choose between Metric (cm, kg) or Imperial (inches, pounds)
- Enter patient height and weight - Use the sliders or type exact values
- Choose a BSA formula - Different formulas may be preferred in various medical specialties
- View real-time results - BSA, BMI, and formula comparisons update instantly
- Save important calculations - Store results for future reference
Which BSA Formula Should You Use?
Our medical calculator includes five different formulas:
- Mosteller - Simplest and most commonly used in clinical practice
- DuBois & DuBois - Historical standard, often used in research
- Haycock - Particularly accurate for pediatric patients
- Gehan & George - Used in some oncology protocols
- Boyd - Developed based on extensive body measurements
For most clinical purposes, the Mosteller formula is recommended due to its simplicity and validation in numerous studies.
Clinical Applications of BSA
The Body Surface Area calculation is essential in several medical contexts:
- Chemotherapy dosing - Many cancer drugs are dosed per m² of BSA
- Renal function assessment - Glomerular filtration rate (GFR) is often normalized to BSA
- Cardiac output - Cardiac index is calculated as cardiac output divided by BSA
- Burn assessment - The "Rule of Nines" for burn estimation is based on BSA percentages
Our healthcare tool is designed for medical professionals, researchers, and students who need accurate, instant BSA calculations. Remember that while this medical tool provides precise calculations, clinical decisions should always be made by qualified healthcare providers.
Pro Tip: Bookmark this page for quick access to this professional BSA calculator during clinical rounds or research work.