Plain vodka contains zero carbohydrates and zero sugar, making it one of the most keto-compatible alcoholic drinks available. A standard 1.5-ounce shot of 80-proof vodka has 97 calories, all of which come from the alcohol itself rather than from carbs or sugar.
Why Vodka Has Zero Carbs
Vodka starts as a fermented mixture of grains, potatoes, or other starches, but the distillation process strips away virtually all sugars and carbohydrates. What remains is ethanol and water. U.S. federal regulations allow vodka to contain a maximum of 2 grams of sugar per liter, which works out to a negligible fraction of a gram in a single shot. In practice, most standard unflavored vodkas register at 0 grams of carbs, 0 grams of sugar, and 0 grams of fat per serving.
The 97 calories in a shot come entirely from alcohol, which your body metabolizes differently than carbs, protein, or fat. Alcohol itself doesn’t contain carbohydrates, so it won’t directly add to your daily carb count. Higher-proof vodka does carry more calories (a 94-proof shot has about 116 calories), but still zero carbs.
How Alcohol Affects Ketosis
Zero carbs doesn’t mean zero impact on your keto progress. When you drink vodka, your liver prioritizes breaking down the alcohol before it processes anything else, including fat. This temporarily pauses fat burning. Your body won’t be kicked out of ketosis by a shot of plain vodka, but fat metabolism slows until the alcohol is fully cleared from your system.
For people using keto primarily for weight loss, this matters. Those 97 calories per shot still count toward your daily energy intake, and your body essentially puts fat burning on hold while it deals with the alcohol. A couple of drinks on a Friday night won’t undo your progress, but regular heavy drinking can meaningfully slow results even if your carb count stays within range.
Many people on keto also notice they feel the effects of alcohol faster. With lower glycogen stores and less food volume in your system, your tolerance drops. One drink can hit like two or three used to.
Flavored Vodka: Check the Label
Naturally infused vodkas, where flavor is added during the distillation process, often contain no more calories or carbs than plain vodka. The distinction matters, though: flavored vodkas that use sugary syrups added after distillation can carry significant carbs. A lemonade vodka cocktail, for example, can pack around 26 grams of carbs in a single serving, with 25 of those grams coming from added sugars. That’s enough to blow through most people’s entire daily keto carb budget in one glass.
The safest approach is to stick with unflavored vodka or to read the nutrition label carefully on any flavored variety. Brands aren’t always required to list nutrition facts on alcohol, so if the information isn’t on the bottle, check the brand’s website or stick with plain.
Mixers Are Where Carbs Sneak In
Plain vodka is zero carb, but most of the ways people actually drink vodka are not. Orange juice, cranberry juice, tonic water, and soda all add substantial sugar. A single vodka and cranberry can easily contain 20 or more grams of carbs from the juice alone.
Keto-friendly mixer options that keep your drink at or near zero carbs include:
- Soda water or club soda: zero carbs, zero calories, adds fizz and volume
- Diet tonic water: regular tonic water contains about 22 grams of sugar per 8 ounces, so the diet version is essential
- Fresh lime or lemon squeeze: a wedge adds less than 1 gram of carbs and plenty of flavor
- Sugar-free flavoring syrups: these use non-nutritive sweeteners and add zero carbs
- Plain sparkling water (flavored or unflavored): brands like LaCroix or Topo Chico have zero carbs and no sweeteners
A vodka soda with a squeeze of lime is probably the simplest keto cocktail: zero carbs from the vodka, zero from the soda water, and a trace amount from the lime. It’s the drink most keto dieters default to when they’re out.
How Vodka Compares to Other Alcohol
Most unflavored distilled spirits (gin, tequila, whiskey, rum) share vodka’s zero-carb profile. The distillation process removes sugars from all of them. Where vodka stands out is its neutral flavor, which pairs easily with zero-carb mixers without needing sweet additions to taste good.
Beer and wine are less keto-friendly by comparison. A standard beer contains 10 to 15 grams of carbs, and even “light” beers typically have 3 to 6 grams. Wine falls in the middle, with a 5-ounce glass of dry wine carrying roughly 3 to 4 grams of carbs. Sweet wines and dessert wines run much higher. If keeping carbs as close to zero as possible is the goal, plain vodka with a zero-carb mixer is hard to beat.