The Starbucks calories calculator works in a very simple way. You start by choosing your drink. This could be a hot coffee, iced drink, frappuccino, tea, or cold brew. After selecting the drink, you choose the size such as Tall, Grande, or Venti. Then you can add or remove syrups, sugar, whipped cream, and toppings. Each extra adds calories. For example, one pump of vanilla syrup adds sugar and calories. The Starbucks calories calculator shows these changes instantly.