Now the commonly used method is biological method, which is bioelectricity method. According to the human body's resistance (fat is very resistant because it doesn't contain water like muscle), combined with parameters such as height, weight, sex and age, it is substituted into the formula for calculation.

One is a fat weight meter, which is usually made of glass. Both the left foot and the right foot have electrodes. Input personal data and measure the fat and water content at the same time.

One is hand-held, the same as inputting data, but it is not stamped, but held with both hands, and the principle is the same;

There is also a special fat meter, which is more accurate and has electrodes on both hands and feet;

In a word, the BIO method measures the body fat content, and it is an approximate value, which will not be very accurate, especially the first two instruments, but that's all we can touch at ordinary times.