Body Fat Percentage Calculator

Calculate body fat percentage, lean body mass, and fat mass using the US Navy tape method.

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  • Private in browser
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Measurements in Centimeters (cm) and Kilograms (kg)
Body Fat %
15.7%
U.S. Navy Method
Category
Fitness
Fitness Level
Fat Mass
11.7 kg
Total Body Fat
Lean Mass
63.3 kg
Muscle, Bone & Water

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About Body Fat Percentage Calculator

Estimate your body fat percentage accurately using the U.S. Navy body composition formula. Using simple tape measurements (neck, waist, and hip circumferences), find your fat percentage, lean body mass, and fitness category.

How to use Body Fat Percentage Calculator

  1. Select Gender: Male or Female.
  2. Enter Height, Weight, Neck circumference, and Waist circumference (plus Hip for females).
  3. View your calculated Body Fat %, Fat Mass, Lean Body Mass, and Fitness Category.

Key features

  • Proven U.S. Navy Department of Defense formula
  • Supports Men and Women with specific physiological equations
  • Metric (cm, kg) and Imperial (inches, lbs) support
  • Classifies body composition: Essential fat, Athletes, Fitness, Average, or Obese
  • 100% private in-browser calculation

Frequently asked questions

What is the U.S. Navy Body Fat method?
The U.S. Navy method uses circumference measurements of the neck, waist (and hips for females) compared against height to calculate body density and fat percentage with high clinical accuracy.
How should I measure my waist and neck?
Measure neck circumference just below the larynx, and measure waist at the narrowest point or navel level while relaxed.