Vodka Calories Per Shot: Serving Size and Proof Explained

A 1.5 US fluid-ounce serving of 80-proof spirits has an average of 97 kcal in the NIAAA calorie calculator. That includes vodka. A “shot” can mean a different volume, so check the measure before applying that number to your drink.

This guide explains serving-size arithmetic and label comparisons. We checked the cited sources on 13 October 2026. The estimates below are not laboratory measurements or verified nutrition values for individual vodka brands.

How many calories are in your measure?

The NIAAA Alcohol Calorie Calculator lists its spirits figure as an average. The following values scale that reference by volume for plain 80-proof vodka, before mixers:

Values are rounded estimates, not manufacturer declarations. They assume the same strength and composition as the reference. “1 oz” here means a US fluid ounce, not an ounce of weight. NIST’s conversion table gives approximately 29.57 ml per US fluid ounce.

Proof, ABV and the estimate

In the US proof system, proof is twice the alcohol-by-volume percentage: 80 proof means 40% ABV and 100 proof means 50% ABV. This follows the TTB explanation of proof. Use the printed ABV on the actual bottle; do not apply that US conversion to a historical proof scale from another country.

For plain spirits, a rough comparison based on the NIAAA reference is:

estimated kcal ≈ 97 × (serving ml ÷ 44.36) × (ABV % ÷ 40)

For a hypothetical 30 ml serving at 40% ABV: 97 × 30 ÷ 44.36 ≈ 66 kcal. This scales an average; it does not calculate added sugar or verify a product’s composition. Prefer the exact manufacturer nutrition statement when available.

Why zero carbohydrate does not mean zero calories

The NHS explanation of alcohol calories states that alcohol supplies 7 kcal per gram. Calories can therefore come from alcohol even when a product has no carbohydrate. A mixer may contribute additional energy.

Do not substitute volume in millilitres for alcohol mass in grams in that calculation. ABV is a volume percentage. Mixing units is an easy way to produce a number that looks precise but is wrong.

How to compare brands without inventing a chart

1. Identify the exact bottle: distinguish the original product from a flavoured variant, liqueur or ready-to-drink mix. Products sharing a brand name can be different.
2. Check the stated measure: compare energy per the same volume. A smaller listed serving can create an apparent advantage.
3. Check the strength: read ABV rather than assuming every bottle is 40%. A generic plain-spirit estimate is insufficient for a sweetened drink.
4. Save the evidence: retain the manufacturer’s nutrition page or label, the market it describes and the date. Mark a missing value as unknown.

This guide does not establish that every plain vodka brand has identical calories. We have removed the previous unsupported brand rankings and product-specific values. A bottle’s own declaration is more useful than a copied chart without a serving size or source.

Add the complete recipe

For a mixed drink, list each ingredient and its amount. Scale each nutrition declaration to the quantity used, then add the results. For example, a hypothetical mixer labelled 40 kcal per 100 ml contributes 80 kcal when the recipe uses 200 ml. That is an arithmetic example, not a claim about a particular mixer.

For a bottle total, use the same process: multiply declared kcal per 100 ml by bottle volume divided by 100. The result describes the contents of a container; it is not a suggested serving.

Use the drink planner to organise recipe quantities and the recipe library to inspect ingredients. Neither link verifies a brand’s calorie declaration. Calorie comparisons also do not establish that a drink is safe for a particular person.

Learning check: a mixer lists 40 kcal per 100 ml. Does a 200 ml portion still contribute 40 kcal?

No. Scale the declaration to the actual amount: 40 × 200 ÷ 100 = 80 kcal. Then account for the other recipe ingredients.