Do you know how much body fat you may be carrying around? Using this Body Fat Calculator will help you determine if you are in a healthy range.

The Body Fat Calculator uses an advanced mathematical formula similar to the one used by the U.S. Military to determine the body fat of service members and recruits. The calculation was developed using the immersion tank test (most precise test) and thousands of recruits. It is accurate to within 1%. Perfect for your weight loss goals!

Body Fat Calculator

Body Fat Calculator Howto

There are several methods to calculate body fat percentage. This calculator uses the formula developed by the US Military, which is the circumference method. This means that you use the circumference of several of your body parts as an input to this formula.

Calculate your body fat percentage for free and learn what it means for your best of health.

Body Fat Calculator

Use the image above to learn how to calculate your body fat percentage, and measure up to 0.5cm or 0.25inch accuracy:

  • men need to measure neck, height and smallest waist
  • women need to calculate neck, height, hips and waist at the level of the navel

Once you have your body measurements, fill in the body fat calculator below and click calculate.

Body Fat Calculator

Metric Units


Body Fat Percentage = 86.010 x log10 (Abdomen (cm) – Neck (cm)) – 70.041 x log10 (Height (cm)) + 36.76


Body Fat Percentage = 163.205 x log10 (Waist (cm) + Hip (cm) – Neck (cm)) – 97.684 x log10 (Height (cm)) – 78.387

Standard Units


Body Fat Percentage = 86.010 x log10(Abdomen (in) – Neck (in)) – 70.041 x log10 (Height (in)) + 30.30


Body Fat Percentage = 163.205 x log10 (Waist (in) + Hip (in) – Neck (in)) – 97.684 x log10 (Height (in)) – 104.912

Body Fat Percentage Chart

The following Body Fat Chart describes body fat ranges and their associated categories.

Essential fat10-13%2-5%

Determining your body fat percentage can help you ascertain if your weight loss plans are realistic. Keep in mind that losing weight does not always mean a loss in fat.

What does your body fat percentage tell you?

According to your age and sex, body fat percentages % are interpret by the colored body fat percentage chart above or the body fat calculation table below:

calculate my body fat percentage

Body fat calculation interpretation according to your age and sex.

What to do now you calculated your body fat percentage?

First you need to see in which category you are. If you are considered healthy, then consider yourself to be good. Otherwise consult your doctor or dietician about what to do next.

Most American citizens will have a body fat percentage that says overweight or obese. Do know that high levels of body fat are a major concern the world over and linked with:

  • high blood pressure,
  • diabetes and
  • heart disease

Low levels of body fat can disrupt basic body function upsetting:

  • the storage of vitamins in your body
  • the proper cushioning of major organs and
  • your body temperature.

Regular body fat percentage calculations combined with regular exercise and a balanced diet based on unprocessed food will bring most people back into the healthy category.