1. What is Body Fat Percentage?

Body fat percentage is the proportion of fat to total body weight. It's a more accurate indicator of fitness than body weight alone, as it distinguishes between fat mass and lean 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 (cm)
• \( neck \) — Neck circumference (cm)
• \( height \) — Height (cm)

Explanation: The formula estimates body fat percentage based on circumference measurements, which correlate with body fat distribution.

3. Importance of Body Fat Measurement

Details: Tracking body fat percentage helps monitor progress in weight loss or muscle gain programs, as it shows changes in body composition that weight alone cannot reveal.

4. Using the Calculator

Tips: For accurate results:

• Measure waist at navel level after exhaling normally
• Measure neck below the larynx with tape sloping downward
• All measurements should be in centimeters

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% is typical (athletes 6-13%, fitness 14-17%, average 18-24%, obese 25%+).

Q3: When should measurements be taken?
A: Morning before eating is ideal, with consistent timing for tracking changes.

Q4: Are there female-specific formulas?
A: Yes, the female formula includes hip measurement. This calculator is for men only.

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