5 calories per 2-1/2 tsp. Makes 10 quarts. For total iced tea refreshment, there's nothing like the genuine taste of Lipton. Lipton Diet Iced Tea makes the most delicious iced tea for you and your family. Only 5 calories per serving! Package sold by weight, not volume. Settling of contents can occur. Questions or comments? Call 1-888-LiptonT (1-888-547-8668) or visit www.lipton.com.