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There are 64 calories in 1 fluid ounce of Vodka (90 Proof). Calorie breakdown: 0% fat, 0% carbs, 100% protein.
Vodka. Vodka is an alcoholic beverage distilled at a high proof from a fermented vegetable or grain mash. Proof is a measurement of the alcohol content. Each degree of proof equals a half percent of alcohol. Thus, 100 proof is that which contains 50% alcohol, 90 proof contains 45%, and so on.Because distilled vodka can have a proof as high as 145, all taste and odor has been eliminated, making vodka a neutral spirit.roof is a measurement of the alcohol content. Each degree of proof equals a half percent of alcohol. Thus, 100 proof is that which contains 50% alcohol, 90 proof contains 45%, and so on. Because distilled vodka can have a proof as high as 145, all taste and odor has been eliminated, making vodka a neutral spirit.