1. What is BMI and BSA?

BMI (Body Mass Index): A measure of body fat based on height and weight that applies to adult men and women.

BSA (Body Surface Area): The total surface area of the human body, often used in medical calculations.

2. How Does the Calculator Work?

The calculator uses two formulas:

Where:

• \( W \) — Weight in kilograms (kg)
• \( H \) — Height in centimeters (cm) for BSA, converted to meters (m) for BMI

Explanation:

• BMI compares your weight to your height squared
• BSA calculates your body's surface area based on weight and height

3. Importance of BMI and BSA

BMI: Helps categorize weight status (underweight, normal, overweight, obese) and assess health risks.

BSA: Used in medical settings for medication dosing, chemotherapy, and other clinical calculations.

4. Using the Calculator

Tips: Enter your weight in kilograms and height in centimeters. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a healthy BMI range?
A: Generally, 18.5-24.9 is considered normal, but consult a healthcare professional for individual assessment.

Q2: Why is BSA important in medicine?
A: Many physiological processes correlate better with body surface area than with body weight alone.

Q3: How accurate are these calculations?
A: They provide estimates. BMI doesn't account for muscle mass, and BSA formulas have limitations for extreme body types.

Q4: Can I use pounds and inches?
A: This calculator uses metric units. Convert pounds to kg (1 lb = 0.453592 kg) and inches to cm (1 in = 2.54 cm).

Q5: Are there different BSA formulas?
A: Yes, this uses the Mosteller formula. Others include DuBois, Haycock, and Gehan-George formulas.