1. What is Body Fat Percentage?

Body fat percentage is the proportion of fat in your body compared to your total body weight. The US Navy body fat formula provides an estimate based on body circumference measurements and height.

2. How Does the Calculator Work?

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

Where:

• \( waist \) — Waist circumference at narrowest point (cm)
• \( hip \) — Hip circumference at widest point (cm)
• \( neck \) — Neck circumference below larynx (cm)
• \( height \) — Height in centimeters

Explanation: The formula uses logarithmic transformations of body measurements to estimate body fat percentage.

3. Importance of Body Fat Measurement

Details: Body fat percentage is a better indicator of fitness than body weight alone. It helps assess health risks associated with obesity and guides fitness programs.

4. Using the Calculator

Tips: Measure circumferences with a flexible tape measure while standing relaxed. For waist, measure at the narrowest point; for hips, at the widest point; for neck, below the larynx.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this method?
A: The US Navy formula is reasonably accurate (±3-4%) for most people but may be less accurate for athletes or those with unusual body compositions.

Q2: What are healthy body fat percentages for women?
A: Essential fat: 10-13%, Athletes: 14-20%, Fitness: 21-24%, Average: 25-31%, Obese: 32%+.

Q3: When should measurements be taken?
A: Best taken in the morning before eating and after using the bathroom. Avoid measuring right after exercise.

Q4: Are there limitations to this method?
A: Less accurate for pregnant women, competitive athletes, and those with significant edema or unusual body shapes.

Q5: How often should I measure?
A: Every 4-8 weeks is sufficient to track changes. Daily measurements may show natural fluctuations.