An electronic device designed to estimate body composition (i.e., percent body fat, lean, bone, and/or hydration) with regards to bioelectrical impedance analysis (BIA) and often personal characteristics (e.g., age, gender, height, weight). It may be in the form of a unit with electrodes applied to the surface of the patient’s body, or a scale(s) placed on the floor and upon which the patient stands to measure total body weight. Both types perform BIA by passing a low electrical current through the body; personal characteristics may be manually entered. Data are analysed to provide measurements that may include body mass index (BMI), fat/muscle/bone mass, and total body water percent.