Ok, I extracted this answer from the web page I found it in, but I am adding the link to the web site to reference it as well. It doesnt answer the question completely, but the web site might be a place for you to start looking into this.
When determining acceptable accuracy, the estimator should remember the differences in volume between in-bank soil, loose soil that has been excavated, and fill soil that has been compacted. The current practice is to adopt an assumed shrinkage factor of 20%-30% for adjustment of fill as it is placed and compacted. For example, a structural fill embankment constructed in controlled lifts may have an 8-inch-thick layer of loose fill soil spread in place and then compacted to a thickness of 6 inches. In addition, a typical swelling factor of 25% is used to account for increases in volume during transportation or stockpiling.
Therefore, 100 bank cubic yards in the ground can become 125 cubic yards loose in the trucks hauling soil from the excavation area.