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Body Fat Calculator

Estimate your body fat percentage using the US Navy method. See fat mass, lean mass, and fitness category.

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Body Measurements

Body Fat Estimate

24.0%

Average

Fat Mass

40.8 lbs

Lean Mass

129.2 lbs

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How to Use Body Fat Calculator

  1. 1

    Select gender

    Choose male or female for the correct formula.

  2. 2

    Take measurements

    Measure your neck, waist, and hip (women only) circumference.

  3. 3

    Enter values

    Input your weight, height, and measurements.

  4. 4

    View results

    See body fat percentage, lean mass, fat mass, and category.

Frequently Asked Questions

The US Navy method is reasonably accurate (within 3-4% of DEXA scans for most people). It's more accurate than BMI alone because it accounts for body proportions. For the most accurate results, take measurements in the morning.

For men: Essential 2-5%, Athletes 6-13%, Fitness 14-17%, Average 18-24%, Obese 25%+. For women: Essential 10-13%, Athletes 14-20%, Fitness 21-24%, Average 25-31%, Obese 32%+.

Measure your waist at the narrowest point, typically at the navel. Keep the tape snug but not compressed. Measure at the same time of day for consistency.

The US Navy formula accounts for gender differences in fat distribution. Women typically store more fat in the hips and thighs, so hip measurements improve accuracy for female calculations.