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 fitness than body weight alone, as it distinguishes between fat mass and lean body mass.

2. How Does the Calculator Work?

The calculator uses the US Navy body fat formula for men:

Where:

• \( abdomen \) — Abdomen circumference at naval (cm)
• \( neck \) — Neck circumference (cm)
• \( height \) — Height (cm)

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

3. Importance of Body Fat Percentage

Details: Knowing your body fat percentage helps assess health risks, track fitness progress, and set appropriate fitness goals. Healthy ranges vary by age and gender.

4. Using the Calculator

Tips: Measure your abdomen at the navel and neck at the narrowest point. All measurements should be in centimeters. For 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 (±3-4%) 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, as food and fluid intake can affect measurements.

Q4: Are there limitations to this method?
A: It may overestimate fat in very muscular individuals and underestimate in obese individuals.

Q5: Is there a different formula for women?
A: Yes, the women's formula includes hip circumference and uses different coefficients.