1. What is BMI and BSA Calculator?

Definition: This calculator computes Body Mass Index (BMI) and Body Surface Area (BSA) based on weight and height measurements.

Purpose: It helps medical professionals and individuals assess body composition and calculate medication dosages.

2. How Does the Calculator Work?

The calculator uses two formulas:

Where:

• \( BMI \) — Body Mass Index (kg/m²)
• \( BSA \) — Body Surface Area (m²)
• \( W \) — Weight (kg)
• \( H \) — Height (m for BMI, cm for BSA)

Explanation: BMI is weight divided by height squared, while BSA is the square root of (weight times height divided by 3600).

3. Importance of BMI and BSA Calculation

Details: BMI helps classify weight status (underweight, normal, overweight, obese). BSA is crucial for accurate medication dosing, especially in chemotherapy.

4. Using the Calculator

Tips: Enter weight in kg, height in meters for BMI, and height in centimeters for BSA. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why different height units for BMI and BSA?
A: BMI traditionally uses meters while BSA formulas typically use centimeters. The calculator accommodates both standards.

Q2: What's a normal BMI range?
A: Generally: Underweight (<18.5), Normal (18.5-24.9), Overweight (25-29.9), Obese (≥30).

Q3: Which BSA formula is this?
A: This uses the Mosteller formula, the most commonly used BSA calculation method.

Q4: Can I use this for children?
A: BMI interpretation differs for children - use pediatric growth charts. BSA calculation is valid for all ages.

Q5: How accurate is BSA for medication dosing?
A: While widely used, BSA-based dosing has limitations. Always consult a healthcare professional for medical decisions.