Aug 31, Swiss cheese has greater energy value, with calories per oz. serving vs. the calories in a similar serving of American cheese. There are 57 calories in 1 cube, 1" ( oz) of Swiss Cheese. You'd need to walk 15 minutes to burn 57 calories. Visit CalorieKing to see calorie count and. Calories in Swiss Cheese Slice based on the calories, fat, protein, carbs and other nutrition information submitted for Swiss Cheese Slice.