1. What is the 7-Point Caliper Method?

The 7-point caliper method is a skinfold measurement technique used to estimate body fat percentage. It measures skinfold thickness at seven specific sites on the body and uses these measurements to calculate body density and subsequently body fat percentage.

2. How Does the Calculator Work?

The calculator uses the Jackson-Pollock 7-site formula:

Where:

• \( Sum7 \) — Sum of 7 skinfold measurements (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 using the Siri equation.

3. Importance of Body Fat Measurement

Details: Body fat percentage is a key indicator of health and fitness. It helps assess obesity risk, monitor fitness progress, and guide nutrition and training programs.

4. Using the Calculator

Tips: Enter the sum of your 7 skinfold measurements in mm (chest, axilla, triceps, subscapular, abdomen, suprailiac, thigh) and your age in years. All values must be valid (sum7 > 0, age between 1-120).

5. Frequently Asked Questions (FAQ)

Q1: What are the 7 measurement sites?
A: Chest, mid-axillary, triceps, subscapular, abdomen, suprailiac, and thigh.

Q2: How accurate is this method?
A: When performed by a trained professional, it's about ±3-5% of actual body fat percentage.

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 timing for repeat measurements.

Q5: Are there limitations to this method?
A: Less accurate for very lean or obese individuals, and results can vary based on technician skill.