Abstract: Disclosed is a separable fat scale including a body weight measuring part for detecting a body weight of a person under test who mounts a weighing platform; electrode parts having thereon at least a pair of electrodes to electrically contact soles of feet of the person under test and formed separately from the weighing platform; an impedance measuring part for measuring impedance of the person under test through his/her soles contacting the electrodes; an input part for inputting personal data including information about physical characteristics of the person under test such as sexuality, age and body height; an arithmetic part for calculating a proportion of body fat in the body of the person under test and/or weight of the body fat under impedance signals obtained from the impedance measuring part, load signals obtained from the body weight measuring part and the personal data input; and a data output part for outputting the calculated proportion of body fat in the body and/or weight of the body fat, wherei