How many calories in Rock and rye whiskey?

There are approximately 110 calories in a 1.5-ounce serving of rock and rye whiskey. This number can vary depending on the brand of whiskey and the proof (alcohol content). For example, a 1.5-ounce serving of 80-proof rock and rye whiskey will have around 110 calories, while a 1.5-ounce serving of 100-proof rock and rye whiskey will have around 140 calories.