No, as far as I know there isnt. You just have to simulate it knowing what the dice are, what his strength is and (possibly) what attack altering items he has.
I was able to do it but it required using UWE by adding damage to a unit and then I made a formula to find out what there average attack would be. Oh and link if I used that method then it would say a different thing every game. One game it might say 10 while another game it might say 14 and another may say 11. I would rather have it the same every single game. Thnx though