getting new wheels, need to figure out the figment, can anyone help?

[cnazzaro240]

I'm going to apologize in advance if this is a dumb question and for wasting everyone's time. I'm buying new wheels and since the rear wheels are bigger and have a lower offset I've already figured out they will poke about 11mm more than before. I currently run 1.5 degrees of camber in ther rear. Is there anyway to calculate how much camber I will need to add to compensate for the added 11 mm the new wheels will poke? Obviously I mean without putting it on an alignment rack. Thanks in advance!