Whiskey is one of the most popular distilled spirits worldwide, enjoyed neat, on the rocks, or in cocktails. But if you're tracking your daily calorie intake, you might wonder: how many calories are in 100 grams of whiskey? Unlike beer or wine, whiskey contains no carbohydrates, fat, or protein — its calories come entirely from alcohol (ethanol). This calculator estimates the calorie content of any whiskey (bourbon, scotch, rye, Irish, Japanese) based on its alcohol by volume (ABV) percentage and serving size.
Whether you're following a calorie-controlled diet, managing your macros, or simply curious about the energy density of your favorite dram, this tool provides a quick, accurate answer. Simply enter the ABV (typically 40–50% for most whiskeys) and the serving weight in grams, and the calculator will return total calories, calories per 100g, and a breakdown of alcohol grams. Perfect for nutrition enthusiasts, fitness trackers, and anyone who enjoys whiskey mindfully.
🥃 Whiskey Calorie Estimator
How to Use This Tool
Using the whiskey calorie calculator is straightforward. Enter the alcohol by volume (ABV) percentage of your whiskey — most standard whiskeys are 40% ABV, but bourbons often range 40–50%, and cask-strength or barrel-proof whiskeys can reach 55–65% ABV. Then enter the weight of your serving in grams (a standard 1.5 oz / 44 ml pour weighs roughly 44 grams; a 100g serving is about 3.5 oz). Click "Calculate" to see total calories, calories per 100g, and the grams of pure ethanol. Use the preset buttons for quick common values.
Formula Explained
Whiskey calories come entirely from ethanol, which provides 7 kcal per gram. The calculation uses the ABV to determine the volume of pure ethanol in the serving, then converts that volume to mass using ethanol's density (0.789 g/mL), and finally multiplies by 7 kcal/g. The formula is:
Ethanol volume (mL) = (ABV / 100) × serving weight (g) × (1 mL / 1 g) — assuming density of whiskey ~1 g/mL (close to water).
Ethanol mass (g) = ethanol volume × 0.789
Calories = ethanol mass × 7
For example, a 100g serving of 40% ABV whiskey contains 40 mL ethanol, which weighs 31.56 g, yielding 220.9 kcal. This matches standard nutrition data (e.g., USDA reports ~231 kcal per 100g for 80-proof whiskey).
Worked Examples
Example 1: Standard 80-proof (40% ABV) whiskey, 50g serving (about 1.75 oz).
Ethanol volume = 0.40 × 50 = 20 mL → mass = 20 × 0.789 = 15.78 g → calories = 15.78 × 7 = 110.5 kcal. Calories per 100g = 221.0 kcal.
Example 2: Cask-strength bourbon, 55% ABV, 44g serving (standard 1.5 oz pour).
Ethanol volume = 0.55 × 44 = 24.2 mL → mass = 24.2 × 0.789 = 19.09 g → calories = 19.09 × 7 = 133.6 kcal. Calories per 100g = 303.7 kcal.
Factors Affecting Accuracy
The calculation assumes the density of whiskey is 1 g/mL, which is a close approximation (actual density varies slightly with alcohol content and dissolved solids). The 7 kcal/g for ethanol is a standard value used by nutrition authorities. Trace calories from congeners, sugars, or other compounds in flavored whiskeys are negligible (typically <1% of total). For the most precise values, refer to the specific brand's nutrition label or the USDA FoodData Central database.
Frequently Asked Questions
Does whiskey have carbs? No, pure distilled whiskey contains no carbohydrates, fat, or protein. All calories come from alcohol.
How many calories are in a shot of whiskey? A standard 1.5 oz (44 mL) shot of 40% ABV whiskey contains about 97–105 kcal. Use this calculator with weight = 44g for an exact figure.
Is whiskey keto-friendly? Yes, because it has zero carbs. However, the body prioritizes metabolizing alcohol over fat, which can temporarily slow fat burning.
Does the type of whiskey matter? Bourbon, scotch, rye, and Irish whiskey all have similar calorie profiles at the same ABV. Flavored whiskeys (e.g., honey, cinnamon) may contain added sugar and additional calories.
Where can I find official nutrition data? The USDA FoodData Central database provides comprehensive nutrition profiles for alcoholic beverages. For more on alcohol metabolism, see the NIAAA Alcohol and Nutrition page.