If you don't add anything to black tea, the heat is basically negligible. Nestle Instant Coffee 445

Heat (100g) If a pack13g, the heat is about 57.85 calories. (In the future, if you want to know the calories of some foods, you can go to Mint.com to check them. Hehe, you can find them in ordinary foods (⊙o⊙).) So, it is better to drink black tea.