In general, 10% to 22% body fat is considered healthy in an adult man, and 20% to 32% body fat is considered healthy in an adult woman. This number (your body density) and your weight when out of the chamber are used to estimate your body fat percentage.Įxperts differ in their opinions about what is a healthy percentage of body fat. The difference between the air pressure inside a sealed chamber when you are in it and when you are out of it is used to calculate your body density. This is similar to underwater weighing except it uses air instead of water. This is a type of X-ray that can tell how much fat tissue you have and where it is. DXA, or dual-energy X-ray absorptiometry.Your body fat percentage is estimated based on the principle that fat tissue is less dense than muscle and bone. The difference between your weight in and out of the water is used to calculate your body density. Results can vary based on how much water is in your body and where the electrodes are placed. There are some devices, including body fat scales, that you can buy to calculate your percentage of body fat using this method. Along with the electrical resistance, your height and weight are used to calculate your percent of body fat. Bioelectrical impedance measurement of body fat is based on the principle that lean body mass conducts electricity better than fat body mass. A small electrical current is passed through your body, allowing the electrical resistance of your body to be measured. But the results can vary when different people take the measurements or if the person taking the measurements is not well-trained. Measuring skin-fold thickness gives a reasonable estimate of body fat composition, especially if measurements are taken from several sites. An instrument called a caliper is used to measure the thickness of fat at one or more sites on the body. But measuring body fat is not done routinely, because all of these methods have advantages and disadvantages as well as margins of error. There are a number of ways to estimate what percentage of your weight is fat.
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