Vodka is a distilled spirit made primarily from fermented grains or potatoes, and it is widely consumed in cocktails and mixed drinks. While vodka is known for its high alcohol content and calorie density, it contains virtually no protein, fat, or carbohydrates. This calculator helps you estimate the protein content (if any) in your vodka serving based on volume and proof, and also provides a breakdown of calories from alcohol.
Whether you are tracking macronutrients for a fitness plan, managing a low-carb or keto diet, or simply curious about the nutritional profile of your drink, this tool gives you quick, accurate numbers. Use it to log your intake, compare different proofs, or plan your evening responsibly.
🥃 Vodka Protein & Calorie Calculator
📊 Results
How to Use This Tool
Enter the volume of vodka you plan to drink (in ounces, milliliters, or centiliters) and the proof of the spirit. The calculator then converts the volume to milliliters, calculates the alcohol by volume (ABV = proof / 2), and estimates the grams of pure ethanol. From there, it computes the calories contributed by alcohol (7 kcal per gram of ethanol) and reports the protein content — which is essentially zero for pure distilled vodka.
Use the quick-fill buttons to instantly load common serving sizes: a standard US shot (1.5 oz at 80 proof), a stronger shot (1.5 oz at 100 proof), or a 50 ml measure (common in Europe). After calculating, you can reset all fields to start a new entry.
Formula Explained
The core calculation follows these steps:
- Volume conversion: If volume is in ounces, multiply by 29.5735 to get ml. If in centiliters, multiply by 10. If already in ml, use as is.
- Alcohol volume: Multiply total volume (ml) by (ABV / 100). ABV = proof ÷ 2.
- Alcohol mass: Multiply alcohol volume (ml) by the density of ethanol (0.789 g/ml).
- Calories from alcohol: Multiply alcohol mass (g) by 7 kcal/g.
- Protein: Set to 0 g, as distilled spirits contain negligible protein.
This method is standard in nutrition science and is used by the USDA and other health authorities.
Worked Examples
Example 1: A standard 1.5 oz (44.36 ml) shot of 80-proof vodka (40% ABV).
- Alcohol volume = 44.36 × 0.40 = 17.74 ml
- Alcohol mass = 17.74 × 0.789 = 14.00 g
- Calories = 14.00 × 7 = 98.0 kcal
- Protein = 0 g
Example 2: A 50 ml serving of 100-proof vodka (50% ABV).
- Alcohol volume = 50 × 0.50 = 25.0 ml
- Alcohol mass = 25.0 × 0.789 = 19.73 g
- Calories = 19.73 × 7 = 138.1 kcal
- Protein = 0 g
Tips & Best Practices
When tracking your daily intake, remember that mixers (tonic water, juice, soda) add significant calories and carbohydrates. Vodka itself is carb-free, but a vodka tonic can contain 15–20 g of sugar per serving. For accurate macronutrient logging, record the mixer separately. Also note that different brands may have slight variations in proof, but the standard range is 80–100 for most vodkas.
Factors Affecting Accuracy
The calculation assumes pure ethanol density at room temperature (0.789 g/ml). In reality, the density of ethanol-water mixtures varies slightly with temperature and proof, but the error is less than 1% for typical drinking temperatures. The calorie value of 7 kcal/g for ethanol is an average; some sources use 6.9 or 7.1, but 7 is the standard for nutrition labeling. If you are using a flavored vodka, trace amounts of sugar may add a few extra calories, but protein remains negligible.
Frequently Asked Questions
Does vodka contain any protein? No. Distilled spirits like vodka are produced by fermentation and distillation, which removes virtually all protein, fat, and carbohydrates. The final product is essentially ethanol and water.
Can I use this calculator for other spirits? Yes, the same formula applies to gin, rum, whiskey, tequila, and other distilled spirits, as they all have negligible protein. Just enter the appropriate proof and volume.
How many calories are in a typical vodka serving? A 1.5 oz shot of 80-proof vodka contains about 97–100 kcal. A 1.5 oz shot of 100-proof vodka contains about 124–130 kcal.
Is vodka keto-friendly? Yes, because it contains no carbs. However, alcohol can temporarily slow fat oxidation, so moderate consumption is advised on a ketogenic diet.
For more detailed nutrition data on alcoholic beverages, visit the USDA FoodData Central.