Read every table below as an estimate range, not a label. Where sources converge, the range is tight; where they don’t, we show the full spread and tell you why.
How Many Carbs Are in Costco Pizza? Slice-by-Slice
| Pizza (food-court slice) | Carbs | Calories | Protein | Fat | Sodium |
|---|---|---|---|---|---|
| Cheese | 70–85g | 700–760 | 40–44g | 27–30g | 1,300–1,780mg |
| Pepperoni | 68–77g | 650–720 | 33–36g | 24–30g | 1,290–1,770mg |
| Combo | 72–82g | 680–760 | 34–36g | 29–32g | 1,520–1,940mg |
These are for the food-court slice — one-sixth of the 18-inch pie, weighing roughly 9–11 oz. The carb load comes mostly from the thick, chewy crust: the dough alone contributes the majority of those 70+ grams, with the sauce and a little sugar in the dough adding the rest.
Cheese vs Pepperoni vs Combo: Carb Comparison
Pepperoni consistently tests a few grams lower in carbs than cheese — the meat displaces some dough and adds no carbs of its own. But the differences are small enough that the ranges overlap, so don’t pick pepperoni for the carbs:
- Cheese: ~70–85g carbs. The highest-protein slice (40–44g) thanks to the double cheese load.
- Pepperoni: ~68–77g carbs. Slightly fewer carbs, but more fat and sodium from the cured meat.
- Combo: ~72–82g carbs. Peppers, onions, mushrooms, and olives add fiber and micronutrients but barely move the carb needle.
Bottom line on variety choice: pick the one you like. The 5-gram carb difference between cheese and pepperoni is a rounding error against a 75-gram slice — portion size moves the needle 10x more than topping choice.
Why the Numbers Vary So Much
Three reasons reputable databases disagree:
- Costco publishes no official food-court nutrition. Every figure comes from third parties (FatSecret, Nutritionix, SnapCalorie, CalorieKing) weighing and estimating independently.
- “One slice” means two different things. The food-court counter slice is 1/6 of the pie; a whole pie you take home is cut into 12 slices — each roughly half the food-court slice. A “slice” from a whole cheese pie is closer to 35–43g of carbs.
- Hand-made variance. Cheese distribution, sauce ladles, and dough thickness differ pie to pie, so even careful measurements land in a range.
Whole-pie math, for the planners: an entire 18″ cheese pizza carries roughly 470–510g of carbs (pepperoni ~420–464g). Split among six people at two food-court-size slices each, that’s a normal — if carb-heavy — shared meal.
Full Estimated Nutrition Per Food-Court Slice
| Nutrient | Cheese Slice | Pepperoni Slice |
|---|---|---|
| Calories | 700–760 | 650–720 |
| Total carbs | 70–85g | 68–77g |
| Sugar | ~8g | ~8g |
| Fiber | ~4g | ~4g |
| Protein | 40–44g | 33–36g |
| Total fat | 27–30g | 24–30g |
| Saturated fat | ~14g | ~12–15g |
| Sodium | 1,300–1,780mg | 1,290–1,770mg |
Two things deserve emphasis: the protein is genuinely impressive (40g+ rivals a chicken breast meal), and the sodium is the stealth problem — one slice can deliver 55–77% of a full day’s limit. If you’re watching blood pressure, the slice is a sometimes-food regardless of the carb math.
How to Fit Costco Pizza Into a Low-Carb Day: 5 Steps
- Know your slice. Food-court slice = ~75g carbs. Whole-pie slice (1/12) = ~38g. Order and plan around the right number.
- Eat half, box half. Half a food-court slice is ~35–40g carbs — a workable indulgence inside a 100g-carb day.
- Go toppings-only for keto. Scrape the cheese and toppings off and skip the crust to cut carbs by roughly two-thirds.
- Front-load protein earlier. Eat lean protein at your other meals so the pizza’s 40g of protein doesn’t push you over your calorie target.
- Skip the soda. A regular fountain drink adds ~40–65g of fast carbs on top — water or diet soda keeps the damage to the slice itself.
Frequently Asked Questions
How many carbs are in a slice of Costco pizza?
A food-court slice of cheese pizza has an estimated 70–85g of carbs. These are third-party estimates — Costco does not publish official food-court nutrition.
How many carbs are in a Costco pepperoni pizza slice?
Roughly 68–77g of carbs per food-court slice — a few grams less than cheese, since the meat displaces some dough. Calories run about 650–720.
How many calories are in a Costco pizza slice?
About 700–760 for cheese, 650–720 for pepperoni, and 680–760 for combo per food-court slice (1/6 of the 18-inch pie).
Why do Costco pizza nutrition numbers vary so much online?
Costco has never published official food-court nutrition, so every number comes from third-party databases measuring independently. Slice definitions also differ: a food-court slice (1/6 pie) is about double a slice cut from a whole take-home pie (1/12).
How many slices are in a Costco pizza?
A whole 18-inch Costco pizza is cut into 12 slices. The single slice sold at the food-court counter is much bigger — 1/6 of a pie.
How big is a Costco pizza?
18 inches in diameter — about 4 inches wider than a standard large chain pizza. A cheese slice weighs roughly 9.5–11 oz.
How many carbs are in a whole Costco pizza?
An entire 18″ cheese pizza carries an estimated 470–510g of carbs (pepperoni roughly 420–464g). Split six ways, that’s about 78–85g per person at two slices each.
Is Costco pizza keto-friendly?
No — at ~70–85g of carbs per slice, it blows through a typical 20–50g keto daily budget. The toppings-only trick (skip the crust) is the closest keto workaround.
Which Costco pizza has the fewest carbs?
Pepperoni edges out cheese by a few grams (~68–77g vs ~70–85g), but the ranges overlap and the difference is minor. Portion size matters far more than variety.
Does Costco publish nutrition facts for the food court?
No. Unlike most fast-food chains, Costco does not publish official nutrition information for food-court items. All published figures are estimates from independent nutrition databases — treat them as ranges, not labels.
The Bottom Line
One Costco food-court pizza slice carries roughly 70–85g of carbs and 700–760 calories — a serious chunk of anyone’s daily budget, driven by the thick 18-inch crust. Because Costco publishes no official numbers, treat every figure as an estimate range and remember that a food-court slice is double a whole-pie slice. Split it, skip the soda, and enjoy it as the occasional indulgence it is — the official word, such as it is, lives only at costco.com, which stays silent on food-court nutrition.
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