A body fat calculator waist only is a tool for estimating body fat percentage based solely on waist circumference. To use one, simply measure your waist at the narrowest point, typically just above the belly button, and input the value into the calculator.
This method is not as accurate as more comprehensive body fat measurement techniques, such as underwater weighing or bioelectrical impedance analysis. However, it is a simple and convenient way to get a general idea of your body fat percentage. Body fat calculators can be useful for tracking progress over time or for setting realistic fitness goals.