Moreover, calories in vodka and bitter lemon, wherein 1.5 ounces of vodka is added to 3 ounces of lemon-lime soda, 3 fluid ounces of tonic water, and a slice of lime corresponds to 180 calories and 17 grams of carbohydrates. In case of a vodka martini, 3 ounces of vodka, a splash of dry vermouth, and a green olive dunked into it corresponds to 210 calories.