This U.S. Army/Navy/Marine body fat percentage calculator is an anthropometric (tape measure) method of determining total body fat percentage, lean body mass, fat body mass and BMI. For more details, see below.
The Body Fat Calculator is based on equations developed by James A. Hodgdon and Marcie B. Beckett at the U.S. Naval Health Research Center in 1984 and involves measuring height and the circumference of the neck, waist, and hips (only for women) and plugging the data into an equation (different for men and women) to determine total body fat percentage. Details on the equations can be found here.
Included below are the cut-off body fat percentages for the different age groups and sexes in the U.S. Army, U.S. Marine, and U.S. Navy Corp.
The Department of Deference has set a minimum goal of 18% body fat percentage for men and 26% for women.
General: It is best to take multiple measurements and average them out before putting the numbers into the body fat calculator. For a more accurate assessment, ask someone else to take your measurements.
Height: It is important to be still, stand barefoot and look ahead during measurement.
Neck: Stay relaxed, look ahead and get the measurement of the circumference of the neck at a point just below Adam’s apple (larynx).
Waist: Look straight ahead, keep your arms placed at your side and do not suck in your gut. Measure the circumference of the belly around the navel.
Hip: Feet must be placed close together and the measurement must include the largest circumference of the hips.
The calculator above includes settings for the Metric System as well as the U.S. Customary System.
The Body Fat Calculator takes into account all the factors used by the U.S. Military in measuring a recruit's body fat percentage. In accordance with the U.S. Army Standards of Medical Fitness, a candidate must meet its maximum allowable body fat percentage standard prior to entry in the army. These body fat percentages are as follows:
The U.S. Marine Corps. Body fat percentage standard is based in accordance with the Marine Corps Body Composition and Military Appearance Program. These body fat percentages are as follows:
Body Fat Percentage Qualification U.S. Marine Corps.
|17 to 20||18%||26%|
|21 to 25||18%||26%|
|26 to 30||19%||27%|
|31 to 35||19%||27%|
|36 to 40||20%||28%|
|41 to 45||20%||28%|
|46 to 50||21%||29%|
The U.S. Marine Corps. Body fat percentage standard is based in accordance with The Body Composition Assessment (BCA). The maximum allowable body fat percentages are as follows:
|18 to 21||22%||33%|
|22 to 29||23%||34%|
|30 to 39||24%||35%|
BMI is a simple measurement based on your height and weight to determine if you are underweight, normal weight, overweight or obese. BMI does not measure body fat percentage directly but has shown to moderately correlate with other methods of body fat measurement.
It is a rudimentary measurement and can vary significantly depending on age, distribution of muscle mass, bone density and fat mass. The BMI calculation does not take ethnic body differences into account. It should be taken as a rule of thumb rather than the perfect determination of your overall health.
BMI General Categories
|18.5 – 24.9||Normal or Healthy Weight|
|25.0 – 29.9||Overweight|
|30.0 and Above||Obese|
BMI Height & Weight Chart
The World Health Organization has the following breakdown for BMI Categories:
|Category||BMI (FROM)||BMI (TO)|
|Very severely underweight||-||15|
|Normal (healthy weight)||18.5||25|
|Obese Class I (Moderately obese)||30||35|
|Obese Class II (Severely obese)||35||40|
|Obese Class III (Very severely obese)||40||45|
|Obese Class IV (Morbidly obese)||45||50|
|Obese Class V (Super obese)||50||60|
|Obese Class VI (Hyper obese)||60+|
1. Comparison of Bioelectrical Impedance and Navy Seal Formula to Measure Body Composition in Medical Students
2. Weight Management: State of the Science and Opportunities for Military Programs.
3. Maximum Body Fat (%) for Accession and Retention
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