1. What is a Body Fat Calculator?

Definition: This calculator estimates body fat percentage based on body measurements using the US Navy method.

Purpose: It helps individuals track fitness progress and assess health risks associated with body composition.

2. How Does the Calculator Work?

The calculator uses the US Navy body fat formula:

Where density is calculated differently for men and women based on circumference measurements.

Explanation: The formula uses logarithmic transformations of circumference measurements to estimate body density, which is then converted to body fat percentage.

3. Importance of Body Fat Measurement

Details: Body fat percentage is a better health indicator than BMI alone, helping assess obesity risks and fitness levels.

4. Using the Calculator

Tips: Measure circumferences at the correct anatomical locations. For women, hip measurement is required. All measurements should be in centimeters.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this method?
A: The US Navy method is about ±3% accurate compared to more advanced methods like DEXA scans.

Q2: Where should I measure each circumference?
A: Neck - narrowest point; Waist - at navel level; Hip - widest point (women only).

Q3: What's a healthy body fat percentage?
A: For men: 8-19% (athletes), 20-25% (acceptable); Women: 21-33% (athletes), 24-30% (acceptable).

Q4: Why different formulas for men and women?
A: Women naturally carry more body fat, especially in hip/thigh areas, requiring different calculations.

Q5: Can I use this calculator for teenagers?
A: No, this calculator is designed for adults 18+ as body composition differs in developing adolescents.