How is the body fat percentage calculated? What is the margin of error?
To calculate body fat percentage (BFP), ZOZOFIT uses the U.S. Navy methodology, which mainly uses your neck and waist measurements (and for female measurements, it also includes hip measurements), to make an estimation of the percentage. Unlike other methods, like DXA scans or smart scales, ZOZOFIT does not rely on X-rays or electric current sent through your body. Smartscales can furthermore be manipulated by your hydration levels or by small amounts of sweat. The beauty of ZOZOFIT’s approach to BFP is the stability and specificity that comes from the accuracy of our measurement methods, which have been tested over and over again, with only a margin of error of 0.15 inch.
Few customers have informed us that their BFP looks different from other devices they may have used in the past, and we are continuing to investigate our methodology as we constantly work to improve our app's algorithms. Nevertheless, we highly recommend our users to utilize ZOZOFIT’s BFP metrics as a tool to monitor patterns and trends over time.