1. What is the Deurenberg Formula?

The Deurenberg formula estimates body fat percentage using BMI, age, and gender. It provides a more accurate assessment of body composition than BMI alone, especially for individuals with higher muscle mass.

2. How Does the Calculator Work?

The calculator uses the Deurenberg formula:

Where:

• \( BMI \) — Body Mass Index (kg/m²)
• \( Age \) — Age in years
• 10.8 — Male adjustment factor
• 5.4 — Female adjustment factor

Explanation: The equation accounts for the relationship between BMI, age, and gender to estimate body fat percentage.

3. Importance of Body Fat Calculation

Details: Body fat percentage is a better indicator of health than BMI alone, especially for muscular individuals who may have high BMI but low body fat.

4. Using the Calculator

Tips: Enter your BMI 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: Why use this formula instead of just BMI?
A: This formula accounts for age and gender differences in body composition, providing a more accurate estimate of body fat percentage.

Q2: What are normal body fat percentages?
A: For men: 8-19% (athletes), 19-24% (fitness), 25%+ (obese). For women: 21-33% (athletes), 25-31% (fitness), 32%+ (obese).

Q3: How accurate is this formula?
A: It provides a reasonable estimate but may be less accurate for very muscular individuals or those with very low body fat.

Q4: Should I use this if I'm very muscular?
A: While better than BMI alone, more specialized methods (DEXA, skinfold) may be needed for highly muscular individuals.

Q5: Does this work for all ages?
A: It works best for adults. Different formulas are needed for children and adolescents.