Like Crevette said, you can see on their description.
If you are talking about damage conversion, then you would have to go through that manually by looking into the items you have and what is getting converted into what and by how much.
I… also seem to remember that being possible but don’t remember how to do it 
I keep this post as a handy guide for Skeleton related stuff - [Pet] Beginner's Apostle Death Knight (pet theorycrafting section has some neat info)