I got the impression BCBabe was guessing, HomeGirl, which is why I threw in the above calculation... but I still need to know how many squares in the 85% bar to guestimate the carbs per square as you asked. It's NOT on the label.

By the way, in other researches about chocolate, I stumbled on the fact that BitterSweet and SemiSweet (and probably Milk, too) Chocolate have been around for so long and are so "well-known" that they are actually exempt from the Nutrition Info (counts), mostly... in Canadian food regs, anyway!