1. What is BMI and Body Fat Percentage?

Body Mass Index (BMI) is a measure of body fat based on height and weight. Body Fat Percentage is the proportion of fat to total body weight, providing a more accurate assessment 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 BMI formula calculates body mass index, while the body fat formula estimates body fat percentage based on BMI, age, and sex.

3. Importance of BMI and Body Fat Calculation

Details: These measurements help assess health risks associated with weight, guide fitness goals, and monitor progress in weight management programs.

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 considered healthy. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese.

Q2: What are normal body fat percentages?
A: For men: 6-24% is healthy; For women: 16-30% is healthy. Athletes typically have lower percentages.

Q3: How accurate is this body fat calculation?
A: This formula provides an estimate. For precise measurements, methods like DEXA scans or hydrostatic weighing are recommended.

Q4: Should BMI be used for athletes?
A: BMI may overestimate body fat in muscular athletes as it doesn't distinguish between muscle and fat mass.

Q5: How often should I measure these values?
A: For general tracking, monthly measurements are sufficient. More frequent measurements may be needed during weight loss/gain programs.