Professional Body Fat Calculator Gender: Male Female Height (cm): Waist (cm): Neck (cm): Calculate Body Fat % Your Body Fat Percentage What is a Body Fat Calculator? Your weight alone doesn't tell the whole story of your health. A Body Fat Calculator helps you estimate what percentage of your total body weight is made up of fat versus lean mass (muscles, bones, and organs). This is a much better indicator of fitness than just looking at the scale. How Does the Calculation Work? Our tool uses the U.S. Navy Circumference Method , which is a scientifically recognized way to estimate body fat without expensive clinical equipment. By measur...