The most accurate means to calculate body fat percentage is with hydrostatic or underwater weighing. This method gives you a measurement of your true body composition. This procedure is difficult because it requires precise equipment such as a pool or large tub of water and well trained technicians to execute.

This test is based on the premise that fat floats and muscles sinks. The weight that registers on the scale is plugged into a formula to find your results. All weights are measured in kilograms but you may convert it into pounds after you plugged kilograms into the formula.

How the test is preformed

1: You are your subject sit on a scale in a tank or large body of water. It would be large enough to submerge your entire body.

2: Blow all of the air out of your lungs then bend forward until you’re completely submerged. It is important to make sure that your lungs are empty for an accurate reading.

3: Stay underwater for five seconds while the digital scale weights your body.

4: Once you get your results in kg’s, plug this into the formulas below. If you want to know your weight in pounds, simple convert it after you plug in the numbers.

Click on the link below to get the formulas.

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