Cup to Gram Conversions | eHow
One cup of all-purpose white flour is 125 g, or a density of 125 g/cup. To determine how many grams of flour to use in a recipe, multiply 125 by the number of cups required. Remember that 1/4 cup is 0.25 cups, 1/3 cup is 0.33 cups and 1/2 cup is 0.5 cups....