1. What is Body Fat Percentage?

Body Fat Percentage (BFP) is the total mass of fat divided by total body mass, multiplied by 100. It provides a more accurate assessment of body composition than BMI alone, as it distinguishes between fat mass and lean body mass.

2. How Does the Calculator Work?

The calculator uses the following formulas:

Where:

• BMI — Body Mass Index (kg/m²)
• Age — Age in years
• Different constants are applied based on gender

Explanation: This formula estimates body fat percentage using BMI and age, with adjustments for gender differences in body composition.

3. Importance of Body Fat Percentage

Details: Knowing your body fat percentage is important for assessing health risks, tracking fitness progress, and setting appropriate weight management goals. High body fat percentage is associated with increased risk of various health conditions.

4. Using the Calculator

Tips: Enter your BMI value in kg/m², age in years, and select your gender. All values must be valid (BMI > 0, age between 1-120).

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this calculation method?
A: This formula provides a reasonable estimate but may not be as accurate as more advanced methods like DEXA scans or hydrostatic weighing.

Q2: What are healthy body fat percentage ranges?
A: For men: 8-19% (athletes), 11-21% (fitness), 18-25% (acceptable); For women: 21-33% (athletes), 23-33% (fitness), 25-38% (acceptable).

Q3: Why are there different formulas for men and women?
A: Women naturally have higher essential body fat percentages due to reproductive functions and hormonal differences.

Q4: Can I use this calculator if I'm pregnant?
A: No, this calculator is not suitable for pregnant women as pregnancy significantly alters body composition.

Q5: How often should I measure my body fat percentage?
A: For most people, measuring every 4-8 weeks is sufficient to track changes without becoming obsessive about daily fluctuations.