How Many Calories Are In A Costco Pepperoni Pizza? | Straight Facts

Calories In A Costco Pepperoni Pizza Slice (And Whole Pie)

Big slices are the draw. Across U.S. warehouses, posted numbers typically land around 650–710 calories per pepperoni slice, depending on region and board updates. A full 18-inch pie holds six generous slices, so the whole thing stacks up near 3,900–4,260 calories. That range lines up with common menu boards and independent nutrition panels reported for Costco’s food court slices. Axios noted the newer 6-ounce cookie at 750 calories—about “100 more than a slice of pepperoni”—which backs a ~650-calorie pepperoni slice in many clubs. FastFoodNutrition’s panel shows 710 calories per pepperoni slice; some stores do post a higher figure, and that’s why the range above makes sense for planning.

What Actually Drives The Number

Portion size and moisture decide most of the math here. Costco slices are 1/6 of a very large 18-inch pizza. That’s wider and heavier than a standard chain slice. Pepperoni adds fat and a little extra protein, and the cheese layer is generous. If the pie bakes a touch longer and loses more water, the same slice weighs less and the calories per 100 g rise. If the slice is cut thicker on a busy day, your single piece might simply weigh more.

Quick Reference: Serving Sizes And Calories

Serving	Calories	Notes
Food Court Slice (Pepperoni)	~650–710	Menu boards vary by market; slice is 1/6 of an 18" pie.
Whole 18" Pizza	~3,900–4,260	Multiply the slice by six for a rough whole-pizza total.
Take & Bake Slice	~330–450	Depends on the in-store label and how you top it.
Frozen Kirkland Thin Crust (per labeled serving)	~300–360	Check the box; serving sizes are smaller and consistent.
Generic Pepperoni Pizza (100 g)	~259–296	USDA-sourced datasets show this range for pepperoni pizza.

For ingredient-level context, check the USDA-sourced pepperoni pizza profile at MyFoodData, which compiles calories and macros from FoodData Central. It’s helpful when you want to translate a slice into grams. You’ll also see why sodium runs high in most pizza slices, and why careful sides and drinks can balance a meal. The CDC’s page on sodium targets lays out the 2,300 mg daily cap for healthy adults—handy if you’re building the rest of the day around pizza.

How Costco Pepperoni Calories Compare By Format

Costco sells pizza three ways: the hot food court slice, the in-store Take & Bake pie, and boxed frozen Kirkland Signature pizzas. The calories shift because the portions and crusts are different.

Food Court Slice

This is the classic giant slice. The heavy cheese blanket and a big wedge shape push the calories up. That’s the 650–710 zone many shoppers recognize from the board. Axios clocked the new cookie at 750 calories “about 100 more than a slice,” reinforcing the lower end of that range. FastFoodNutrition lists 710 for a pepperoni slice, which reflects one common board figure. Different warehouses may round differently or update boards at different times.

Refrigerated Take & Bake

You finish this pie at home, so the serving size is whatever you cut. Labels on similar in-store pizzas show per-serving calories around the mid-300s, but that’s for smaller, labeled portions. If you cut it into food-court-sized wedges, you’ll land closer to the hot slice numbers.

Frozen Kirkland Signature Pizzas

Boxed thin-crust pepperoni pizzas are portioned by the manufacturer. Labeled serving calories hover around 300–360 per serving, and the serving is smaller than a food court wedge. It’s the most predictable option because the box is your guide.

Estimating Your Own Slice (No Scale Needed)

Want a quick estimate at the table? Use a two-step check: size and extras. If the slice looks oversized or loaded with extra pepperoni, steer toward the high end of the range. If it’s a lighter bake with fewer pools of oil, the lower end fits better. Sauces and dips matter as well—two tablespoons of ranch add roughly 140 calories, and a tablespoon of garlic butter adds around 100.

Why 100-Gram Numbers Help

USDA-sourced datasets show pepperoni pizza near 259–296 calories per 100 g. If you’re tracking, you can eyeball weight: a big Costco wedge often falls in the 280–320 g ballpark once cooled, which lands you right inside the 650–710 window. You don’t need lab gear—just keep the portion cues in mind.

Costco Pepperoni Nutrition: Macros, Sodium, And Satiety

A pepperoni slice brings a solid hit of protein from cheese and meat, plenty of carbs from crust, and fat from both the cheese and pepperoni. That mix is filling, which is why one slice can hold you longer than a smaller chain slice. The trade-off is sodium. Many panels place a pepperoni slice well over 1,000 mg, so plan the day’s other meals around produce and lower-sodium options. Water beats soda for pairing, and a simple side salad evens out the plate.

Make It Lighter Without Losing The Costco Feel

• Skip ranch and butter dips when you already have a pepperoni slice.
• Pair with a zero-cal beverage and a produce-heavy side from the warehouse.
• Split a slice with a friend and add a protein-lean salad to keep hunger at bay.

Close Variant: Calories For Costco Pepperoni Pizza (Slice Vs Whole)

Shoppers often ask two things: how many calories in one pepperoni slice, and how many in the whole pie. The short math is simple: one pepperoni slice is about 650–710 calories; six slices make the full 18-inch pizza, so you’re near 3,900–4,260 calories for the entire box. If you’re feeding a group, count how many slices people usually eat, then round up by 50–100 calories per person to cover sauces or extra cheese. Snacks fit better once you set your daily calorie needs.

What Changes The Count Most

Cut Size

Every pizza has six slices, but cut variation happens. A slightly wider wedge can swing 40–80 calories. If two slices look uneven, take the smaller one and the numbers slide a little.

Moisture Loss During Bake

Longer bakes drive off water, concentrating calories per gram. Two visually similar slices can differ just on how long they sat in the oven.

Add-Ons And Dips

Extra cheese, extra pepperoni, ranch, or garlic butter add quick calories. If you want the pepperoni flavor with less drift, ask for no dip and keep the toppings standard.

Toppings And Extras: Typical Calorie Adds

Extra	Calories	Notes
Extra Cheese (~1 oz)	+110	Mozzarella estimate per ounce.
Extra Pepperoni (~10 rounds)	+130	Common add for a heavier slice.
Ranch (2 Tbsp)	+140	Dipping cup or two packets.
Garlic Butter (1 Tbsp)	+100	Brushed crust or dip.
Hot Honey (1 Tbsp)	+60	Trendy drizzle adds sugar.

How To Fit A Costco Slice Into Your Day

Plan around the slice. If lunch is a 650–710 calorie pepperoni wedge, shape breakfast and dinner with produce, lean protein, and fiber. Watch sodium at other meals, and keep beverages simple. If you’re training or active, a big slice can sit fine after a workout when glycogen is low. If you’re desk-bound today, aim for one slice and a large salad.

Simple Order Swaps That Help

• Choose water or a diet soda over a large sweet drink.
• Share one whole pie among seven or eight people instead of six.
• Go cheese-only if pepperoni pushes your sodium too high for the day.

Sources, Transparency, And Why Numbers Vary

Costco’s menu boards show calories at the point of sale, but boards can vary by club and timing. Third-party sites publish nutrition panels based on posted signs and product labels. Axios reported the 750-calorie cookie is roughly 100 calories above a pepperoni slice, which implies ~650 calories per slice in many stores. FastFoodNutrition lists a pepperoni slice at 710 calories, echoing higher postings. For labeled, non-food-court items like frozen Kirkland pizzas, the box is your best guide. When you need a generic gram-based fallback, USDA-sourced pepperoni pizza entries (as compiled at MyFoodData) are reliable for conversions and macro splits.

FAQ-Free Wrap-Up You Can Use Right Now

Here’s the whole picture in one breath: one Costco pepperoni slice runs about 650–710 calories; the whole 18-inch pie lands around 3,900–4,260 calories; extras add up fast. Hydrate, add produce, and let the slice be the star. Want a deeper primer on calories and weight control basics? Try our calorie needs guide.

Notes: Axios reported a 750-calorie cookie “about 100 more than a slice of pepperoni pizza,” supporting a ~650-calorie slice in many clubs. FastFoodNutrition lists a pepperoni slice at 710 calories, a figure seen on some menu boards. USDA-sourced data via MyFoodData provides gram-based estimates for generic pepperoni pizza.