Bread equals sugar 22. June 2011 William Davis (36) Bread, gluten-free or gluten-containing, in terms of carbohydrate content, is equivalent to sugar.Two slices of store-bought whole grain bread, such as the gluten-free bread I discussed in my last post, equals 5- 6 teaspoons of table sugar: Some breads can contain up to twice this quantity, i.e., 10-12 teaspoons equivalent readily-digestible carbohydrate.