Updated April 2026.
A 1.5-ounce shot of 80-proof (40% ABV) bourbon is about 97 calories, almost all ethanol. USDA FoodData Central lists 80-proof distilled spirits at 231 kcal per 100 g; a 1.5-ounce jigger is about 42 g, which is ~97 kcal. NIAAA’s 14 grams of alcohol at 7 kcal/g is 98 kcal. Unflavored bourbon has 0 g carbohydrate on that USDA line. Maker’s Mark flagship is Proof 90 on makersmark.com — about 110 kcal and 1.13 drinks, not 86 proof.
Proof is the lever. A 1.5-ounce pour of 100-proof bourbon is 1.25 standard drinks and about 122 kcal from ethanol. 100 proof is not bottled-in-bond by itself (27 CFR 5.88). Honey, maple, and cinnamon flavored whiskies add sugar the USDA 80-proof line does not include. Read the label.
Calories vs proof (1.5 oz pour)
| Pour | ABV | Std drinks | Approx. kcal | Carbs |
|---|---|---|---|---|
| 80-proof bourbon (USDA 80-proof spirits) | 40% | 1.00 | ~97 | 0 g |
| Maker’s Mark flagship (Proof 90 official) | 45% | 1.13 | ~110 | 0 g if unflavored |
| 90-proof USDA line (263 kcal/100 g) | 45% | 1.13 | ~110 | 0 g if unflavored |
| 100-proof (not BiB by proof alone) | 50% | 1.25 | ~122 | 0 g if unflavored |
| Barrel-proof example 120 proof | 60% | 1.50 | ~147 | 0 g if unflavored |
| Old Fashioned (bourbon + sugar + bitters) | — | ~1.3–2 depending on pour | sugar adds 15–50+ | from the cube or syrup |
| Cola highball (1.5 oz 80-proof + 8 oz cola) | — | 1.00 from the whiskey | ~97 + mixer | from the soda |
Competitor tables that list Maker’s Mark at 86 proof are wrong on the current official page (Proof 90). At the same 80 proof, USDA treats gin, rum, vodka, and whiskey as the same 97-kcal shot. Brand is not a calorie loophole. See how much whiskey for the drink count, and Maker’s Mark proof for the 90-proof flagship.
Why bourbon is “zero carb” and still not diet food
Distillation leaves ethanol and water. Fermentable sugar from corn does not survive as carbohydrate in unflavored straight bourbon. TTB identity (27 CFR Part 5) does not require a nutrition panel on most spirits. Flavored whiskey — honey, maple, smoked maple, cinnamon — is a different identity once sugar or flavoring is added. Those calories are not in the 97-kcal USDA row.
Mixers are where the number jumps. Ginger ale, cola, sweet vermouth, and a 2-ounce house Old Fashioned all add sugar or extra whiskey. A “skinny” pour that is still 2 ounces of 100-proof is 1.67 drinks and ~163 kcal from ethanol alone. Ice is 0 kcal and does not metabolize alcohol.
Gluten, “clean,” and what we will not claim
Bourbon is made from grain, often including rye or wheat plus corn. Distillation removes proteins; many people with celiac disease tolerate distilled spirits, but that is a clinician-and-label question, not a guarantee from this page. We are not printing “bourbon is gluten-free and therefore healthy.” Ethanol is 7 kcal/g. Four 97-kcal shots are four drinks and about 390 kcal, and NIAAA’s binge pattern for women is four drinks in about two hours.
Wild Turkey 101 is labeled 50.5% when that SKU says 101. Jack Daniel’s Tennessee whiskey is charcoal-mellowed Tennessee whiskey, not bourbon, but the 80-proof calorie line still applies if it is 40%. Read the proof. For a 1.5-ounce pour size, see how many mL is a shot.
If you are counting
- 80-proof, 1.5 oz, neat or with soda water: ~97 kcal, 1 drink.
- Maker’s Mark flagship 90 proof: ~110 kcal, 1.13 drinks.
- Scale linearly with proof and ounces.
- Count the mixer from its own label.
- Barrel-proof is not a “small sip” just because the glass is small.
Storage does not change calories. Bourbon does not go sour like mix. See does Crown Royal go bad for distilled-spirits storage. Smoky or maple SKUs can be flavored whiskey — see smoky bourbon for the identity split, not a calorie hack.
A fifth is not a “few shots”
A 750 mL bottle of 80-proof bourbon is about 17 standard drinks and about 1,650 kcal if you somehow finished it — inventory, not a weekend plan. See shots in a 750ml bottle. A 2-ounce steakhouse pour is 1.33 drinks and ~130 kcal before the Old Fashioned sugar. A “bourbon flight” of three 0.5-ounce tastes of 100-proof is 1.25 drinks hiding in tiny glasses.
Bitters are a dash, not a meal. Sweet vermouth in a Manhattan is wine-strength carbohydrate plus extra ethanol. Count it. Soda water is the only common mixer that leaves the 97-kcal shot almost unchanged.
More in our Bourbon Guide.
Sources
- USDA FoodData Central SR: Alcoholic beverage, distilled, all 80 proof — 231 kcal/100 g; 0 g carb (FDC 174815). 90 proof — 263 kcal/100 g (FDC 171920). Direct FDC HTML 404 this fetch; numbers from the SR mirrors.
- NIAAA: 14 g alcohol per standard drink; ethanol ~7 kcal/g (December 2025).
- makersmark.com flagship page, fetched 2026-09-01: Proof 90.
- TTB: bourbon identity (≥51% corn, new charred oak, bottled ≥40% ABV). 27 CFR 5.88 bottled-in-bond is not “100 proof.”