Detailed Body Fat Calculator

Body Fat Percentage Formulas:

Navy Method (Men):
%Fat = 86.010×log10(abdomen - neck) - 70.041×log10(height) + 36.76

Navy Method (Women):
%Fat = 163.205×log10(waist + hip - neck) - 97.684×log10(height) - 78.387

Gender:

Height:

inches

Neck Circumference:

inches

Waist Circumference:

inches

Hip Circumference:

inches

Body Fat Percentage:

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1. What is a Detailed Body Fat Calculator?

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

Purpose: It helps individuals assess their body composition more accurately than BMI alone.

2. How Does the Calculator Work?

The calculator uses different formulas for men and women:

For Men:
%Fat = 86.010×log10(abdomen - neck) - 70.041×log10(height) + 36.76

For Women:
%Fat = 163.205×log10(waist + hip - neck) - 97.684×log10(height) - 78.387

Explanation: These formulas account for differences in fat distribution between genders.

3. Importance of Body Fat Measurement

Details: Body fat percentage is a better indicator of health than weight alone, helping assess fitness progress and health risks.

4. Using the Calculator

Tips:

Measure circumference at the narrowest point for neck, natural waist for waist
For women, measure hips at the widest point
Measure in the morning before eating for consistency

5. Frequently Asked Questions (FAQ)

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

Q2: Why different formulas for men and women?
A: Women naturally carry more body fat and distribute it differently than men.

Q3: What's a healthy body fat percentage?
A: For men: 8-19% (athletes), 20-24% (fitness), 25%+ (obese). For women: 21-33% (athletes), 24-30% (fitness), 31%+ (obese).

Q4: How often should I measure?
A: Every 4-8 weeks to track progress, as daily fluctuations are normal.

Q5: Can I use this if I'm very muscular?
A: This method may overestimate body fat for extremely muscular individuals.