1. What is the 9-Point Body Fat Calculation?

The 9-point body fat calculation (Parillo formula) estimates body fat percentage using skinfold measurements from nine different sites on the body. This method provides a comprehensive assessment of subcutaneous fat distribution.

2. How Does the Calculator Work?

The calculator uses the Parillo equations:

Where:

• \( Sum9 \) — Sum of skinfold measurements from 9 sites (mm)
• \( Age \) — Age in years
• \( BD \) — Body Density (g/cm³)
• \( BF\% \) — Body Fat Percentage

Explanation: The equation first calculates body density from skinfold measurements and age, then converts this to body fat percentage.

3. Importance of Body Fat Measurement

Details: Accurate body fat measurement is crucial for fitness assessment, health risk evaluation, and tracking progress in weight management programs.

4. Using the Calculator

Tips: Enter the sum of skinfold measurements from all 9 sites (in mm) and age in years. All values must be valid (sum9 > 0, age between 1-120).

5. Frequently Asked Questions (FAQ)

Q1: What are the 9 measurement sites?
A: Chest, abdominal, thigh, triceps, subscapular, suprailiac, midaxillary, lower back, and calf.

Q2: How accurate is this method?
A: With proper technique, it's about ±3-5% of hydrostatic weighing. Accuracy depends on the skill of the person taking measurements.

Q3: What are healthy body fat percentages?
A: For men: 6-24% (athletes 6-13%, fitness 14-17%, average 18-24%). For women: 16-30% (athletes 14-20%, fitness 21-24%, average 25-30%).

Q4: When should measurements be taken?
A: Ideally in the morning before eating, with consistent hydration levels. Avoid after exercise when fluid shifts may occur.

Q5: Are there limitations to this method?
A: Less accurate for very lean or obese individuals, and doesn't account for visceral fat. Not suitable for those with significant edema.