Today we will find out how do you calculate body fat. Fortunately, there are less expensive and more convenient devices to measure your body-fat percentage. One company has developed weighing scales that measure your body-fat percentage through bioelectrical impedance analysis (BIA). These scales cost between $20 and $200, depending on the model, and are very easy to use. After entering your age, weight, gender, and height, you step barefoot on the machine and it measures your weight and the amount of water in your body. In a matter of seconds, the BIA scale will generate an estimate of your body-fat percentage. While BIA is not nearly as accurate as of the DEXA technology, it is consistent in its measurements. Even if the scale overestimates or underestimates your body-fat percentage, it is consistent enough to accurately tell you if your body-fat percentage is increasing or decreasing.
By tracking the trends in the measurements it generates, you will be able to get an accurate reading of the amount of body fat you gain or lose based on the initial reading from the machine. For example, suppose in reality your body-fat percentage is 15 percent, but the machine tells you it is 17 percent. If your body fat drops a percentage point, the machine will then tell you that it is 16 percent. While this number is inaccurate, the machine is correct in indicating your progress, in that your body-fat percentage has dropped by 1 percentage point. BIA body-fat scales will enable you to track your progress, which is the most important measurement you’ll need.
Getting a consistent reading of your body-fat percentage relies heavily on obtaining your measurement at the same time of day. The manufacturers suggest that you only take your measurement in the evening with an empty bladder before going to bed. While the exact time of day is probably not important, it is imperative to take your measurement at roughly the same time of day every day to get a consistent measurement.