Belly fat is a combination of subcutaneous fat and visceral fat. The result that is measured and displayed is the thickness of subcutaneous fat (not visceral fat).
Abdominal subcutaneous fat is a shock absorber, helping to cushion skin against trauma, and also stores energy, which the body uses during periods of high activity. To get the defined or ripped 6 or 8 pack it is important to measure the thickness of the subcutaneous fat around the stomach.
The lower the number the more defined the six pack will show. The results are measured and displayed in 0.1㎝ increments of thickness Now train and measure that 6 pack.