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The Shocking Truth: How Many Calories Are In A Costco Pizza Slice? (Updated 2025 Nutritional Facts)

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The Costco Food Court pizza slice is legendary, not just for its massive size and unbeatable $1.99 price, but for the sheer volume of fuel it provides. As of late 2025, the nutritional facts for this behemoth of a slice—whether you choose cheese or pepperoni—are often a source of curiosity, and sometimes, shock, for members trying to maintain a balanced diet. Understanding the true caloric and macronutrient breakdown is essential for enjoying this iconic treat responsibly, especially since a single slice can account for a significant portion of your daily intake.

The reason the Costco slice is so calorically dense is simple: it’s huge. Cut from a massive 18-inch pizza, each slice is typically one-twelfth of the entire pie and can weigh nearly 10 ounces. This isn't your average thin-crust slice; it's a deep-dish-style, cheese-laden, dough-heavy meal that packs a surprising protein punch alongside its high fat and carbohydrate content. Let's dive into the updated numbers and compare it to other food court favorites like the famous Chicken Bake.

The Definitive Costco Pizza Slice Calorie Count (2025 Update)

The size of the slice is the primary factor driving the high-calorie count. Costco’s standard 18-inch pizza is cut into 12 equally massive slices, each one weighing approximately 9.5 to 10.8 ounces (about 269 to 300 grams). This is significantly larger than a standard slice from most major pizza chains. For instance, a typical large-chain slice is often closer to 300-400 calories, making the Costco slice nearly double the size and caloric value.

Here is the detailed nutritional breakdown for the two most popular slices as of 2025, based on the latest available data from food court nutrition trackers:

Costco Cheese Pizza Slice Nutrition Facts

  • Calories: 710 Calories
  • Protein: 34 grams
  • Total Fat: 28 grams
  • Saturated Fat: 14 grams (approx.)
  • Total Carbohydrates: 70 grams
  • Sodium: 1,500 - 1,600 mg (approx.)

The cheese slice, despite its name, is a caloric powerhouse. The high-fat content comes primarily from the generous layer of cheese, which is the defining feature of the slice. The 70 grams of carbohydrates are almost entirely from the thick crust, which is made from enriched wheat flour, a source of refined carbs.

Costco Pepperoni Pizza Slice Nutrition Facts

  • Calories: 620 Calories (Some sources list up to 710)
  • Protein: 33 grams
  • Total Fat: 28 grams (approx.)
  • Total Carbohydrates: 77 grams (approx.)
  • Sodium: 1,700 - 1,800 mg (approx.)

Interestingly, some of the most current nutritional data suggests the pepperoni slice is slightly lower in calories (around 620) than the cheese slice (710), though other trackers list them both at 710. The difference often boils down to the exact weight of the slice and the specific amount of pepperoni, but the key takeaway is that both are extremely high-calorie items. The pepperoni slice, however, is significantly higher in sodium due to the cured meat.

The Surprising Protein Punch: Why It’s a ‘Cheat Meal’ Favorite

While the high counts of fat, sodium, and refined carbohydrates are clear indicators that the Costco pizza slice is not a health food, it does offer one surprising benefit that appeals to fitness enthusiasts: its protein content.

With 33 to 34 grams of protein per slice, the Costco pizza slice rivals many protein shakes or even a small steak. This high protein-to-calorie ratio is a key reason why some people view it as an acceptable "cheat meal" or a quick post-workout meal when bulking. The protein comes primarily from the enormous amount of mozzarella cheese used on the 18-inch pie, which is known for its high-quality protein content.

However, this protein benefit must be weighed against the other nutritional drawbacks. A single slice of cheese pizza contains 14 grams of saturated fat, which is often more than 70% of the recommended daily limit for a standard 2,000-calorie diet. Similarly, the sodium content is exceptionally high, making it a concern for those managing blood pressure or cardiovascular health.

Costco Food Court Showdown: Pizza vs. Chicken Bake

The pizza slice is often compared to the other behemoth of the Costco Food Court: the Chicken Bake. For those looking to choose the "lesser of two evils" or simply curious about the comparison, the Chicken Bake is an even more calorically dense option.

The Chicken Bake, which is a blend of chicken, cheese, bacon, and Caesar dressing wrapped in a dough crust, typically clocks in higher than the pizza slice:

  • Chicken Bake Calories: 770 - 840 Calories
  • Chicken Bake Protein: 52 grams (very high)
  • Chicken Bake Total Fat: 32 grams (approx.)

While the Chicken Bake offers a significantly higher protein count, its overall caloric density and often higher fat and sodium levels make it the most indulgent single item on the menu. The choice between the two often comes down to personal preference for flavor and whether you prioritize the massive protein boost of the bake or the classic comfort of the pizza.

Smart Strategies for Enjoying the Costco Slice Healthily

Knowing the true nutritional profile of a Costco pizza slice doesn't mean you have to give it up entirely. It's an affordable, delicious, and convenient treat. The key is moderation and strategic pairing.

1. Practice Mindful Portion Control

The most effective strategy is simple: cut the slice in half. Given that one slice is nearly the equivalent of two standard slices from a delivery chain, eating just half of a Costco slice (around 350 calories) is a perfectly reasonable meal or snack. This allows you to enjoy the flavor without consuming a day’s worth of saturated fat and a third of your daily calories.

2. Pair It with a Low-Calorie Side

Instead of washing it down with a sugary soda, pair your half-slice with a zero-calorie drink or a healthier item from the food court. The classic Hot Dog Combo, while also high in sodium, comes with a soda and is another popular choice. However, if you're aiming for health, consider bringing your own side or choosing a salad. The fruit smoothie is a better option than a sugary soda but still contains a high amount of sugar.

3. Balance Your Macronutrients for the Day

If you know you are going to indulge in a Costco pizza slice, plan the rest of your meals accordingly. Focus on low-fat, high-fiber, and high-protein foods for the remainder of the day. For example, a light, vegetable-heavy breakfast and a dinner featuring lean protein (like grilled chicken or fish) and a large salad can help balance the high fat and refined carbs from the pizza.

4. Water, Water, Water

The immense sodium content in both the cheese and pepperoni slices can lead to water retention and bloating. Make sure to drink plenty of water before and after consuming the pizza to help your body process the high sodium load and stay hydrated.

The Costco pizza slice remains one of the best value-for-money items in fast food, but its nutritional profile is as supersized as its diameter. By understanding the 710-calorie reality of the cheese slice and the 620-calorie pepperoni slice, coupled with the surprising 34-gram protein boost, you can make an informed choice. Enjoy your slice, but be mindful of its powerful impact on your daily dietary goals. The key to enjoying this iconic Kirkland Signature product is balance and moderation.

The Shocking Truth: How Many Calories Are In A Costco Pizza Slice? (Updated 2025 Nutritional Facts)
costco pizza slice calories
costco pizza slice calories

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