1. What is Body Fat Percentage?

Body fat percentage is the proportion of fat in your body compared to your total body weight. It's a more accurate indicator of health than body weight alone, as it distinguishes between fat mass and lean body mass.

2. How Does the Calculator Work?

The calculator uses the U.S. Navy body fat formula for men:

Where:

• \( Waist \) — Waist circumference at navel (inches)
• \( Neck \) — Neck circumference (inches)
• \( Height \) — Height in inches

Explanation: The equation estimates body fat percentage based on circumference measurements and height, using logarithmic relationships to account for non-linear body composition changes.

3. Importance of Body Fat Measurement

Details: Knowing your body fat percentage helps assess health risks, track fitness progress, and set appropriate weight management goals. It's more meaningful than BMI for athletes and muscular individuals.

4. Using the Calculator

Tips: Measure waist at navel level after exhaling normally. Measure neck below the larynx. All measurements should be in inches. For most accurate results, take measurements in the morning before eating.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this method?
A: The Navy method is reasonably accurate (±3%) for most people but may be less accurate for very lean or obese individuals.

Q2: What are healthy body fat percentages?
A: For men: 6-24% (athletes 6-13%, fitness 14-17%, average 18-24%). For women: 16-30% (higher due to essential fat needs).

Q3: When should measurements be taken?
A: Ideally in the morning before eating or drinking, and at consistent times for tracking changes.

Q4: Are there limitations to this method?
A: Less accurate for those with unusual body shapes, significant muscle mass, or who have undergone substantial weight changes.

Q5: How often should I measure?
A: For tracking progress, every 2-4 weeks is sufficient as body fat changes slowly.