 In the United States, it is legally labelled "zero calories"; U.S. FDA regulations allow this "if the food contains less than 5 Calories per reference amount customarily consumed and per labeled serving".3.2 packets (3.36 kcal each) of Splenda contain the same caloric content as one packet of sugar (10.8 kcal).Further, Splenda contains a relatively small amount of sucralose, little of which is metabolized; virtually all of Splenda's caloric content derives from the dextrose or highly fluffed maltodextrin "bulking agents" that give Splenda its volume.