The above body fat
calculator uses the U.S. Navy Circumference Method where
three or four body measurements are fed into a fixed
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 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