When packing for a move it is a good idea to keep all the cartons or boxes you use to a particular size.
So let's say you are going to have three size cartons, small medium and large all the small should be the same size and medium and large the same. This make for much easier carting and loading. It also helps you too. It must be said that some people do find calculating how many cartons will be moving for there quotation. So rather than worry to much lets give you a few ideas.