Yes. To measure body fat, body fat monitors use bioelectrical impedance analysis (BIA), which detects the speed in which electricity flows through the body to return overall body fat. The more water body tissue contains, the slowest the electrical current goes, which is used to estimate. There are steps you can take to improve accuracy. It is best practice to place the scale on a hard surface. Weighing at the same time each day after using the bathroom also helps. Body fat monitors are a great way to track your BMI, muscle, visceral fat, weight body fat percentage, body age, and so on.