1. What is BMI and Body Fat Percentage?

BMI (Body Mass Index) is a measure of body fat based on height and weight. Body Fat Percentage estimates the proportion of fat to total body weight, providing a more comprehensive view of body composition than BMI alone.

2. How Does the Calculator Work?

The calculator uses the following formulas:

Where:

• \( weight \) — Body weight in kilograms (kg)
• \( height \) — Height in meters (m)
• \( age \) — Age in years
• \( sex \) — 1 for male, 0 for female

Explanation: The body fat formula incorporates BMI, age, and sex to provide a more accurate estimation of body fat percentage.

3. Importance of BMI and Body Fat Calculation

Details: Monitoring BMI and body fat percentage helps assess health risks associated with weight, track fitness progress, and guide nutrition and exercise plans.

4. Using the Calculator

Tips: Enter weight in kg, height in meters, age in years, and select sex. All values must be valid (weight > 0, height > 0, age between 1-120).

5. Frequently Asked Questions (FAQ)

Q1: What is a healthy BMI range?
A: For adults, a BMI between 18.5 and 24.9 is generally considered healthy. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese.

Q2: What are healthy body fat percentages?
A: For men: 6-24% (athletes: 6-13%, fitness: 14-17%, average: 18-24%). For women: 16-30% (athletes: 14-20%, fitness: 21-24%, average: 25-30%).

Q3: How accurate is this body fat calculation?
A: This formula provides an estimation. For more precise measurements, consider methods like DEXA scans, hydrostatic weighing, or skinfold calipers.

Q4: Should athletes use standard BMI categories?
A: Athletes with high muscle mass may have elevated BMI without excess body fat. Body fat percentage provides better assessment for muscular individuals.

Q5: How often should I measure BMI and body fat?
A: Monthly measurements are sufficient for tracking trends. Daily fluctuations are normal due to hydration and other factors.