15 calories per tsp. Per 1 Tsp: 15 calories; 0 g sat fat (0% DV); 0 mg sodium (0% DV). Naturally fat-free. Pure can sugar. This type of sugar dissolves easily, which makes it ideal for meringue (see this page for further meringue advice). Superfine sugar is also a bar staple since the tiny grains dissolve in cocktails like this traditional margarita more quickly than table sugar does.