Online Body Fat Percentage Calculator

Use this online body fat calculator to workout out your body’s total percentage of fat.

MaleFemale

Inches cm
Height:
Neck:
Waist:



The formulas used for calculating body fat percentage are based on the US Army, Navy and Marine Corp standards for determining personnel fitness. The US Department of Defense use the test for recruitment, promotion and as part of an annual fitness check.

Instruction for taking measurements for the Body Fat Calculator

  • Take the neck measurement just below the adam’s apple
  • For men, take the waist measurement at the level of the belly button at the end of a normal relaxed exhalation.
  • For women, measure the waist at the slimmest point, usually somewhere above the belly button. Take at the end of a normal relaxed exhalation.
  • Women only – take the hip measurement at the point of the greatest circumference.

You can enter your measurements in imperial (inches), metric (cms) or a combination of both. The Body Fat Calculator will automatically convert between inches and cm.

Is the body fat measurement percentage accurate?

Body circumference measurement is not as accurate as other more involved methods such as hydrostatic weighing, where your weight is measured while your body is fully submerged in a tank of water. As you can imagine, hydrostatic weighing is very inconvenient and expensive compared to just using circumference measurements.

However, if you want to monitor physique and physical fitness improvements following changes to your life style (see How to be a Slim Person – Why Diets Don’t Work), the body fat calculator is a great indicator of your progress, better than measuring your weight. The US military consider that weight loss is less important than reducing your body fat.

What should your body fat percentage be?

Above 25% for men and 32% for women is considered obese. Athletes tend to have a range of 6 – 13% for men and 14 – 20% for women.

References


How to be a Slim Person – Why Diets Don’t Work
US Department of Defense – Physical Fitness and Body Fat Program – Directive
US Department of Defense – Physical Fitness and Body Fat Program – Instructions
Wikipedia – Body fat percentage

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