Generally speaking, the complete machine with a overall weight is 0.8t - 3.5t, which is called mini-excavator; the complete machine with a overall weight of 3.5t - 13t is called a compact-excavator;
The complete machine with a overall weight of more than 13t but less than 30t is called a medium excavator; the excavators are widely used in urban construction, medium and large scale earthwork construction.