1. What is the Deurenberg Formula?

The Deurenberg formula estimates body fat percentage using BMI and age, with different constants for men and women. It provides a simple method to assess body composition without specialized equipment.

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 — Constant for males
• 5.4 — Constant for females

Explanation: The formula accounts for the relationship between BMI, age, and body fat percentage, with different adjustments for men and women.

3. Importance of Body Fat Percentage

Details: Body fat percentage is a key indicator of health and fitness. It provides more accurate health assessment than weight or BMI alone, as it distinguishes between fat mass and lean mass.

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: How accurate is this formula?
A: While useful for population estimates, it may not be accurate for individuals, especially athletes or those with unusual body compositions.

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

Q3: Can I use this for children?
A: No, this formula is designed for adults. Children require different assessment methods.

Q4: Are there more accurate methods?
A: Yes, methods like DEXA scans, hydrostatic weighing, or skinfold measurements provide more precise results.

Q5: Why different formulas for men and women?
A: Women naturally have higher essential body fat percentages due to reproductive needs.