Bioelectrical impedance technology
More than just weight
Withings Body+ uses bioelectrical impedance analysis (BIA) to estimate body composition.
The scale assesses body fat and water percentage, as well as muscle and bone mass, to help people take steps toward a healthier lifestyle.
All of these measurements are taken automatically each time someone steps on the scale.
How it works
In BIA, the scale sends a safe, low-amplitude electrical current through the body, measuring the resistance of biological tissues to the flow of this current. In this way, the scale can assess body composition using scientifically validated equations.
By measuring the voltage drop between the other two electrodes, located at the heels of the left and right feet, the scale can measure impedance, which can then be used to calculate an estimate of fat-free body mass and, by difference with body weight, fat mass.