how could i find out my total avoidance?
Or Combine the Numbers in your Character pane for 5%+ Miss % (added from Defense) + Parry % + Dodge % = Total Avoidance, remember Block is not considered avoidance
The TankPoints addon has a really great tester screen that will compute your individual and total values for avoidance vs a variable mob level. Set at 83 it will tell you what your actual avoidance is vs a raid boss.
BoJlk the flaw in that is that you don't get the diminished % miss from Miss from the character pane. The parry% and dodge% that you see (not highlighted info) is the post-DR #'s so they're accurate but the miss from defense is not since you have ot highlight to see it (pre-DR). The link that satrina posted is the easiest way to calculate it.