Tea with no additives contains a minuscule amount of calories, in the range of 2 to 5 calories per cup. There is no fat or cholesterol in tea, and roughly 7 milligrams of sodium per 8-ounce serving.
The addition of milk, sugar or other additives to tea does add calories. One teaspoon of granulated sugar adds roughly 15 calories to tea, while rock sugar does not affect the calorie count, according to Teavana. Teas are also typically gluten-free, with roughly 0.7 grams of carbohydrates per serving. Tea is a good source of natural antioxidants and potassium, with 87.69 milligrams in an 8-ounce serving.