And is there a cap?
I've looked everywhere in pipboy and vats etc but nothing, I have some stuff that boosts it but it would be nice for an overall total.
And no mods, I'm on 360.
This is probably the most comprehensive explanation for calculating critical chance that you'll find - http://fallout.wikia.com/wiki/Critical_Chance
I don't think there is a way to see it in game without using UI/HUD mods, though.