1. What is the Body Fat Percentage Formula?

The body fat percentage formula estimates body fat based on BMI, age, and gender. It provides a quick assessment of body composition and health risk factors associated with excess body fat.

2. How Does the Calculator Work?

The calculator uses the body fat percentage formula:

Where:

• \( BMI \) — Body Mass Index (unitless)
• \( age \) — Age in years
• \( sex \) — 1 for male, 0 for female

Explanation: The equation accounts for the relationship between BMI, age, gender and body fat percentage, with different coefficients for different demographic factors.

3. Importance of Body Fat Calculation

Details: Body fat percentage is a crucial indicator of overall health and fitness. It helps assess health risks associated with obesity and provides a more accurate picture of body composition than weight alone.

4. Using the Calculator

Tips: Enter BMI (calculated as weight in kg divided by height in meters squared), age in years, and select gender. All values must be valid (BMI > 0, age between 1-120).

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this formula?
A: This formula provides a reasonable estimate but may not be as accurate as methods like DEXA scans or hydrostatic weighing. It's best used as a screening tool.

Q2: What are healthy body fat percentages?
A: For men: 8-19% (athletes), 20-24% (fitness), 25%+ (obese). For women: 21-33% (athletes), 34-39% (fitness), 40%+ (obese).

Q3: How often should I measure body fat?
A: Monthly measurements are sufficient for tracking progress. Daily fluctuations are normal due to hydration and other factors.

Q4: Are there limitations to this formula?
A: Less accurate for athletes with high muscle mass, elderly individuals, and those with extreme body compositions.

Q5: Should I use this for medical diagnosis?
A: This calculator is for informational purposes only. Consult healthcare professionals for medical advice and accurate body composition assessment.