How many calories in a brandy and Diet Coke?

There are approximately 57 calories in a single serving (1.5fl oz) of brandy. Since Diet Coke contains almost no calories (around 1 to 4 calories per serving), the calorie contribution of a brandy and Diet Coke drink will mostly come from the brandy. So, a brandy and Diet Coke drink will typically contain around 57 calories per serving. However, the exact calorie count may vary depending on the ratio of brandy and Diet Coke used in the drink.