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Navy Body Fat Calculator

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What are the necessary measurements?What formula does the US Navy body fat calculator use?The US Navy body fat standardsFAQs

One of the best methods of estimating the fat content of a person's body was developed by US Navy and it calculates body fat with good precision. This parameter is determined for all service members of the US Navy since they are required to meet certain percent body fat (%BF) standards as a condition of military service.

Read on to understand the equation and to check if you could join the naval forces. The US Navy body fat calculator is different to the method provided in our body fat calculator or the US Army body fat calculator, so you might also want to check them out to compare the results.

What are the necessary measurements?

You'll only need a measuring tape. Then, start taking measurements:

  1. Height — make sure you stand up straight and barefoot.
  2. Neck — the circumference should be measured just underneath the larynx (Adam's apple).
  3. Waist — should be measured horizontally, around the narrowest part of the abdomen for women and at the navel level for men.
  4. Hips — should be measured at the widest part of the buttocks or hip.

You can input the values in both imperial and metric units. If you have already taken these measurements, you can also calculate your body shape.

What formula does the US Navy body fat calculator use?

The equation was developed at the Naval Health Research Center (NHRC), San Diego, California.

For men, it looks like this:

%BF = 495 / (1.0324 − 0.19077 × log10(waist − neck) + 0.15456 × log10(height)) − 450

And for women:

%BF = 495 / (1.29579 − 0.35004 × log10(waist + hip − neck) + 0.22100 × log10(height)) − 450

Please note that the formulas presented above are for measurements in metric units.

The US Navy body fat standards

The limit of body fat percentage for US Navy service members:

  • Age 18 to 21 — 22% for males, 33% for females;
  • Age 22 to 29 — 23% for males, 34% for females;
  • Age 30 to 39 — 24% for males, 35% for females;
  • Age over 40 — 26% for males, 36% for females.

Body fat percentage plays an important role in distinguishing between a healthy and an obese individual, as it has a greater ability to differentiate between lean mass and fat mass compared to BMI. If you're interested in this topic, check out this article on Military Standards for Fitness, Weight, and Body Composition.


What is the navy body fat percentage of a 6 ft male?

To calculate the Navy body fat percentage for males, you’d need measurements of his height along with the circumference of his neck and waist. Hence assuming the waist circumference is 40.2 inches (102.1 cm) and neck circumference is 15.2 inches (38.6 cm), the body fat percentage for this 6 ft male would be 26.8%.

How much body fat is allowed in the US Navy?

How much body fat is allowed in the US Navy depends on gender and age. For instance, the body fat percentage limit ranges from 22% to 26% for men, depending on the age group. On the other hand, for women, the range is from 33% to 36%.

How accurate is the US Navy body fat calculator?

The US Navy body fat calculator is a relatively accurate and straightforward way to determine adult body fat percentage. Studies show that it is more effective in differentiating lean and fat mass than BMI.

How do I calculate the Navy body fat percentage for women?

To calculate the Navy body fat percentage for women:

  1. Measure the person's height as well as the circumference of the waist, neck, and hips.
  2. Apply the US Navy body fat percentage formula to convert the determined measurements into the body fat percentage.

If you're interested in the formula or instructions on how to take measurements, visit Omni's Navy Body Fat Calculator.

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