Military Body Fat Calculator for
Calculating Your Body Fat Percentage

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Army body fat calculator and its visual instructions helps you to measure body fat percentages using only standard or metric tape measurements.

This online military body fat calculator will help you to calculate your body fat percentage using only a tape measure.

The calculations are based on the Circumference Method, developed by the military (U.S. Navy and U.S. Army) for estimating percent of body fat.

While a skin fold test using a body fat caliper is considered to be the most accurate, this calculator will allow to get a close estimate without having to go out and buy a caliper.

If you do have a skin fold caliper, I suggest you use either the 3-Site Body Compostion Calculator or the 7-Site Skin Fold Test Calculator, whichever you prefer.

So with that, let's use the military body fat calculator to calculate your fat percentage.

Calculate Your Body Composition

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Instructions: Choose Standard or Metric, choose your gender, and enter your height and weight in your chosen measurement.

Next, take three tape measurements of your neck, three of your waist (and three of your hips if you are female) and enter the results in the appropriate fields, then click the "Calculate Body Fat" button.

Clicking on the test site links in the military body fat calculator will take you to pictures on this page showing how each tape measurement site is measured.

Mouse over the blue question marks for a further explanation of each entry field. More in-depth explanations can be found in the glossary of terms located just beneath the military body fat calculator.

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Help for online military body fat calculator: measurement Measurement:
Help for online military body fat calculator: gender Gender:
Help for online military body fat calculator: height Height in inches:
Help for online military body fat calculator: weight Weight in pounds:
Female Body Part in. in. in. Avg. in.
Help for online military body fat calculator: neck Neck
Help for online military body fat calculator: waist or abdomen Waist
Help for online military body fat calculator: hips Hips
Body Fat %:
Pounds of Body Fat:
Pounds of Lean Body Weight:
Please grade my work and help me improve:
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Military Body Fat Calculator Glossary of TermsCalcy magnifying glass

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Circumference Method: A body fat percentage formula developed by the U.S. Navy for using two and three tape measurements to estimate body fat percentage.

Body Fat Percentage Calculation: The formulas for calculating male and female percentages are as follows:

Male BF%=495/(1.0324-0.19077(log(w-n))+0.15456(log(h)))-450
Female BF%=495/(1.29579-0.35004(log(w+h-n))+0.22100(log(h)))-450
Variables n = neck, h = height, w = waist, h = hips

BF% Categories: The American Council on Exercise lists the following BF% categories:

Category Women Men
Essential fat 10% to 12% 2% to 4%
Athletes 14% to 20% 6% to 13%
Fitness 21% to 24% 14% to 17%
Acceptable 25% to 31% 18% to 25%
Obese 32% or higher 26% or higher

Tape Measurement Sites

Neck Tape Measurement
Female Male
Military body fat calculator: Female Neck tape measurement Military body fat calculator: Male Neck tape measurement
Neck: Place the tape at the narrowest point of the neck, sloping slightly down to the front. For men the measurement is taken below the Adams apple. For women measurements are taken at approximately the same area.
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Waist Tape Measurement
Female Male
Military body fat calculator: Female Waist tape measurement Military body fat calculator: Male Waist tape measurement
Waist - Women: The waist should be measured at the narrowest level, above the belly button (umbilicus). Another reference is halfway between the lowest rib on the sides and the top of the hips. If you’re unsure measure a second and a third time until you get the lowest value. Make sure the tape is horizontal.

Waist - Men: Measure the waist circumference at the level of the belly button (umbilicus). Here you don't need to find the narrowest size. Make sure the tape is horizontal.

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Hips Tape Measurement (Women Only)
Military body fat calculator: Female Hips tape measurement
Hips: Use the widest circumference of the hips with the tape as horizontal as possible. Should be measured with minimal clothing or underwear. Relax the buttocks (gluteus muscles) and spread the feet to shoulder width. Not applicable for calculating male body fat percentage.
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