1. What is Body Fat Percentage?

Body Fat Percentage (BFP) is the proportion of fat to total body weight. It provides a more accurate measure of fitness than BMI alone, as it distinguishes between fat mass and lean mass.

2. How Does the Calculator Work?

The calculator uses the following equation:

Where:

• \( BMI \) — Body Mass Index (kg/m²)
• \( Age \) — Age in years
• Different constants are used for men and women

Explanation: The equation estimates body fat based on BMI while accounting for age and gender differences in body composition.

3. Importance of Body Fat Percentage

Details: Knowing your body fat percentage helps assess health risks, track fitness progress, and set appropriate weight management goals. High body fat is associated with increased risk of chronic diseases.

4. Using the Calculator

Tips: Enter your BMI (calculate it first if needed), age in years, and select your gender. For accurate results, use a recently measured BMI value.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this calculation?
A: This provides a reasonable estimate but may vary ±3-5% from actual measurements. More accurate methods include DEXA scans or hydrostatic weighing.

Q2: What are healthy body fat ranges?
A: For men: 8-19% (athletes), 11-21% (fitness), 18-25% (acceptable). For women: 21-33% (varies by category).

Q3: Why different formulas for men and women?
A: Women naturally carry more essential body fat for reproductive functions, typically 10-12% more than men at similar fitness levels.

Q4: Can I use this if I'm very muscular?
A: This equation may overestimate body fat for highly muscular individuals as it doesn't account for muscle mass beyond BMI.

Q5: How often should I measure body fat?
A: For tracking changes, every 4-8 weeks is sufficient as body fat changes slowly with diet and exercise.