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This body fat calculator uses the U.S. Navy Circumference Method where three or four body measurements are fed into a formula to estimate the percentage of your body that is made up of fat.

The measurements need to be accurate to within 0.5cm or 0.25 inches (centimeters tend to produce the most accurate results) and should be taken as follows:

  • Height: taken without shoes
  • Neck: taken below the larynx sloping slightly downward at the front
  • Waist: for men at navel height, for women at the smallest point
  • Hips: (women only) at the largest point.
Body Fat Calculator

General Body Fat Percentage Categories*
Classification Women (% fat) Men (% fat)
Essential Fat 10-12% 2-4%
Athletes 14-20% 6-13%
Fitness 21-24% 14-17%
Acceptable 25-31% 18-25%
Obese 32% plus 25% plus

*American Council on Exercise

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