(updated August 15th, 2026)
A traditional cappuccino contains about 4 to 5 grams of sugar, and none of it is added. All of it is lactose, the sugar that comes naturally in milk. Espresso contributes almost nothing, so the milk is the entire answer.
That means the figure moves with how much milk is in the cup, not with how strong the coffee is. Most café milk runs between 4 and 5 percent lactose, so you can work the sugar out from the milk alone. Here’s how that lands for the cup sizes you’ll actually meet.
| Milk in the cup | Sugar (all of it lactose) |
|---|---|
| 100 ml (Certified Italian Cappuccino) | 4 to 5 g |
| 150 ml | 6 to 8 g |
| 200 ml | 8 to 10 g |
| 250 ml (typical large takeaway) | 10 to 13 g |
Why the number you’ve seen is usually higher
Most figures online land between 10 and 12 grams. They’re not wrong, they’re describing a different drink. The Istituto Espresso Italiano specifies a cappuccino as 25 ml of espresso and 100 ml of steamed milk. A large takeaway cup holds more than twice that much milk, so it carries more than twice the sugar.
Worth knowing when you’re comparing sizes: a cappuccino holds less milk than a latte in the same cup, because a good part of its volume is foam, and foam is just milk with air beaten into it. Starbucks’ own nutrition figures put a Grande cappuccino at 12 g of sugar, which is exactly where the milk volume in a cup that size lands it.
You’ll also still find it written, on this site included, that a cappuccino is equal parts espresso, milk and foam. It isn’t, and that matters here because it makes the drink sound like it holds far less milk than it does. I’ve gone through what the ratio actually is separately.
How many carbs are in a cappuccino?
A traditional cappuccino contains about 4 to 5 grams of carbohydrate, which is the same number as its sugar. Lactose is a carbohydrate, so on a cappuccino made with dairy those two figures are always identical, and there’s no fibre and nothing else in the cup contributing any. On oat milk they come apart: Oatly lists 7.2 g of carbohydrate per 100 ml against 3.5 g of sugar.
Is there such a thing as a sugar-free cappuccino?
A plain cappuccino is already sugar-free in the sense most people mean it: nothing has been added. What you can’t take out is the lactose, because it arrives with the milk.
Lactose-free milk doesn’t help, and this one catches people out. The lactase enzyme splits lactose into glucose and galactose rather than removing it, so the grams stay exactly where they were. It tastes sweeter, not lighter, because those two sugars are sweeter than the lactose they came from.
If you want to genuinely cut the sugar, the milk is the lever. Switching doesn’t do quite what most people expect, though, so here is what the cartons actually say.
| Per 100 ml | Sugars | Carbohydrate |
|---|---|---|
| Dairy milk | 4 to 5 g | 4 to 5 g |
| Oatly Oat Drink Original | 3.5 g | 7.2 g |
| Alpro unsweetened almond | 0 g | 0 g |
Those are the own-brand figures and they do shift between brands, so the carton beats anything you read here. Sweetened versions are a different drink again. But the shape holds: unsweetened almond is the only one that really takes the sugar out, and oat is the one worth understanding, because it removes a little sugar and adds a lot of carbohydrate. Liquefying the oats breaks their starch down into shorter chains. So switching to oat to cut sugar buys you far less than you’d think, and if you’re counting carbs it moves you backwards. And if you’re ordering anything flavoured, that’s where the sugar actually is: the syrup, not the milk.
Can a diabetic drink cappuccino?
A plain cappuccino is a low-sugar drink, and its 4 to 5 grams arrive alongside protein and fat, which slows how quickly they’re absorbed. Flavoured versions are a different question entirely. It’s worth more than a paragraph, so I’ve written up whether a diabetic can drink cappuccino on its own page.
So should you worry about it?
I wouldn’t. At 4 to 5 grams a traditional cappuccino is one of the lowest-sugar things on a café menu, and the sugar it does have comes with the protein and calcium of the milk rather than on its own. If you’re watching sugar, the cappuccino isn’t the problem. The syrup pump next to it is, and so is the cup size: order a large one and you’ve roughly doubled the number without changing the drink. If calories are the reason you’re asking, the calorie figures follow the same rule, and for the same reason.
