By the measure of calories.<p>&gt; Carbohydrate provides 4 calories per gram, protein provides 4 calories per gram, and fat provides 9 calories per gram.<p><a href="http:&#x2F;&#x2F;fnic.nal.usda.gov&#x2F;how-many-calories-are-one-gram-fat-carbohydrate-or-protein" rel="nofollow">http:&#x2F;&#x2F;fnic.nal.usda.gov&#x2F;how-many-calories-are-one-gram-fat-...</a>