>>For alcoholic beverages, the amount of alcohol is the same whether or not ice is added.

Also true for 'iced' coffee. The trick is to proportion the weight of grounds to liquid so the ice counts as somewhere between 80-100% liquid, depending on how quickly you think it might be consumed. If you have a kitchen scale, no fancy calculation is required. By definition one gram of water is 1 ml in volume, so you can just use the weight of the ice and brew-water combined.