I believe there is a formula that can help estimate how many yards of soil are in a pile? I have a potential job of removing a large pile of excavated soil from a site, but want to try to get a rough idea of how many yards it is so I can estimate how many loads the dump truck will need. I was thinking if I have the circumference, height and degree of slope there must be a formula that can be used to determine this? Can anyone help? Thanks.