Here are the foods from our food nutrition database that were used for the nutrition calculations of this recipe. Calories per serving of Dirty Martini - 4oz Vodka - 2 oz Vermouth - 1 oz olive juice. 257 calories of Vodka, (4 fl oz). 64 calories of Dry Vermouth, (2 oz). 30 calories of Olive Juice ~ 1 Oz, (1 serving).