How many calories are in a whisky?
A 25 ml (0.9 fl oz) measure of 40% whisky is about 55 kcal, and a 50 ml double about 110. The spirit is the predictable half of the drink. Whatever goes in the glass with it is not, and it is usually the larger number.
Per portion
| Portion | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|
| Single, 25 ml, 40% | ~55 kcal | 0 g | 0 g | 0 g |
| US shot, 44 ml, 40% | ~95 kcal | 0 g | 0 g | 0 g |
| Double, 50 ml, 40% | ~110 kcal | 0 g | 0 g | 0 g |
| Single, 25 ml, cask strength 58% | ~80 kcal | 0 g | 0 g | 0 g |
| Double + 200 ml cola | ~195 kcal | 0 g | 21 g | 0 g |
| Double + 200 ml diet cola | ~110 kcal | 0 g | 0 g | 0 g |
| Whisky sour | ~175 kcal | 1 g | 14 g | 0 g |
What changes the number
The mixer, most of the time. Per 200 ml (7 fl oz): cola about 85 kcal, ginger beer 90, tonic 70, ginger ale 70, lemonade 40–80, and soda water, plain water, ice and diet or zero versions of all of them 0–5. Added to a 110 kcal double, a full-sugar mixer is not a garnish — it is most of the drink.
Sugar added by hand. A teaspoon of sugar is about 18 kcal, 15 ml of sugar syrup 45, a tablespoon of honey 65. That is why an old fashioned sits near 155 kcal and a hot toddy near 80. The cream floated on an Irish coffee is another 100–150 on its own.
The measure, which is standard nowhere. A single is 25 ml in the UK, 35 ml in Ireland, 44 ml in the US, and whatever the bottle gives at home, where free pours run reliably larger than intended.
Bottling strength. Most whisky is 40%; 43% adds about 4 kcal to a single, and cask strength at 55–60% adds 20–25. Nothing else about the liquid matters.
Where it fits in a deficit
Neat whisky has no carbohydrate, protein or fat at all, so 55 kcal is the entire figure — and it buys nothing. A spirit carries no satiety, the same problem as any drink with no food in it.
Alcohol also does something the calorie figure does not capture, which the beer page explains. National guidance on low-risk drinking limits exists and the numbers differ by country, so check yours; this page covers energy content only.
The spirit is easy to plan because it is fixed. Two doubles with soda is about 220 kcal, which most people can place inside a calorie deficit without much thought. Two doubles with cola is 390, and that is a different decision.
Age, cask and peat never appear in the figure
Nothing about how a whisky is made changes its calories at the same strength and measure. Single malt or blend, 12 years old or 25, peated or not, Scotch, bourbon, rye, Irish or Japanese: all about 55 kcal per 25 ml at 40%. Colour comes from the cask or from caramel colouring added in quantities too small to register, and there is no residual sugar to argue about. The same is true across the spirit shelf — a vodka at the same strength is the same number.
The exception is anything labelled a liqueur or a “spirit drink”. Honey, spiced and cream whisky products are bottled at 17–35% ABV with sugar added, and a 25 ml of a cream version is nearer 80 kcal with fat and carbohydrate alongside it. Those are not whisky figures, so read the label rather than assuming.
Figures are typical values and vary by variety, size and preparation. General information, not medical advice.