I have purchased a scale for measure flour years ago and thought that I would help me be consistant in my baking.  The problem is that not all flours seem to be consistant.  I've gone to web sites and found a chart for converting cups of flours to grams.  Whole wheat, white flour, bread flour but when I do the math and purchase a bag of KA whole wheat, look at the weight and how many cups are in the bag, the weight is different.  Is there a accepted standard of flour weights out there?  WW is so many grams, AP is so many grams or do the flour companies say our cup of flour wieghs x many grams?  I hate measuring flour by the cup and am finder it hard to find a good method of converting cup to grams with all of the inconsistancies.

Mark