The honest answer is that there is no single number, because the carb count depends on the size of the pizza, the thickness of the crust, and how big the slice is. In general, one slice of pizza often lands somewhere around 20 to 40 grams of carbs, with thin-crust slices sometimes lower and larger hand-tossed or specialty slices often higher.

A good way to understand it is to look at real nutrition data from major chains. In Domino’s January 2026 nutrition guide, a 14-inch large hand-tossed slice works out to about 34 grams of carbs for a plain cheese slice when you combine the crust, pizza sauce, and regular cheese listed per 1/8 slice. A large crunchy thin slice comes out much lower, at about 16 grams. A 12-inch medium New York style cheese slice comes out to about 23 grams.

Other official nutrition data show the same pattern. Papa Johns’ nutrition guide lists one-topping pizza slices at about 24 grams for an extra-small slice, about 25 grams for small, medium, and large slices, and about 31 grams for an extra-large slice. Domino’s specialty large slices are also commonly in the mid-30s, with examples in its guide ranging from 34 to 39 grams per large slice.

So if someone asks, “How many carbs are in one slice of pizza?” the most useful everyday answer is this: a typical slice is usually in the mid-20s to mid-30s, but thin crust can be notably lower and oversized or heavily topped slices can push toward 40 grams or more. The word “slice” matters almost as much as the pizza itself, because one slice from a small pizza and one slice from a large pizza are not the same amount of food.

If you are trying to estimate quickly without looking up a nutrition label, a simple rule is to count about 25 to 35 grams for a regular slice, about 15 to 20 grams for a thinner-crust slice, and closer to 35 to 45 grams for a large specialty slice. That will usually put you much closer to reality than assuming every slice is the same.