How Many Calories in a Slice of Pizza? Four Things Must Hold First

A slice of cheese pizza cut from a 14-inch restaurant pie into eight pieces contains 285 calories. The figure comes from USDA FoodData Central record 173292 — Fast Food, Pizza Chain, 14" pizza, cheese topping, regular crust — which puts the food at 266 calories per 100 grams, the slice at 107 grams and the whole pie at 853 grams, or 2,269 calories for the pizza. Those 285 calories hold only while four conditions hold with them: fourteen inches across, eight cuts, regular crust, cheese and nothing else. Break one and the answer moves. The same USDA table gives a thin-crust cheese slice 230 calories and a thick-crust pepperoni slice 339.

The four numbers sitting under one slice

That record rests on physical measurement. Its 107-gram slice weight carries 192 data points and its 853-gram pie weight carries 24. Somebody weighed 192 slices and 24 whole pizzas, then wrote the numbers down.

For years I walked twelve stores on a fixed route, reading the price of the same eighty items into a form for a government index. Weighing a thing and recording what you weighed is the least interesting part of the job and the only part that survives an argument. It is also the part almost nobody does with pizza, which is why the internet is full of slice counts that trace back to nothing.

Divide 853 by 107 and you get 7.97. Those two weights were measured separately, from different sample counts, and they agree on eight cuts to within three hundredths of a slice. That internal consistency is why I trust this record more than any figure a calculator hands me without showing its work.

Here is the full family from the same USDA collection, every pizza fourteen inches across:

| 14-inch pizza (USDA SR Legacy) | Slice weight | Slice calories | Whole pie | Pie calories | |---|---|---|---|---| | Cheese, thin crust | 76 g | 230 | 590 g | 1,782 | | Cheese, regular crust | 107 g | 285 | 853 g | 2,269 | | Cheese, thick crust | 115 g | 312 | 922 g | 2,499 | | Pepperoni, regular crust | 111 g | 313 | 895 g | 2,524 | | Pepperoni, thick crust | 118 g | 339 | 946 g | 2,715 | | Pizza Hut 14" cheese, hand-tossed | 105 g | 289 | 841 g | 2,313 | | Pizza Hut 14" cheese, pan | 112 g | 309 | 897 g | 2,476 |

Look at the thin-crust row against the regular. The denser food is the thin crust, at 302 calories per 100 grams against 266. It still saves you 55 calories a slice, because the slice weighs 76 grams instead of 107. The saving is 31 grams of missing food. I think it is the most misread fact here.

Why the cut count moves the answer more than the crust does

Domino's runs a public calculator it calls the Cal-O-Meter, and the calculator states its serving basis in plain words next to the number. Ask it for a Large 14-inch Hand Tossed cheese pizza and it returns 290 calories with the serving described as "1 slice (1/8 of pizza)." Ask it for a Large 14-inch New York Style cheese pizza and it returns 280 calories with the serving described as "1 slice (1/6 of pizza)."

Same chain. Same fourteen inches. Same word on the menu. One slice is an eighth of the pie and the other is a sixth, and the two numbers land ten calories apart.

It was three in the afternoon when I checked, and I was standing up between clicks for no reason I could name, so I ran the pair four times in case I had fumbled a dropdown. The numbers did not move. Behind them, in Domino's own ingredient data file, the New York slice weighs 120.04 grams and the Hand Tossed slice weighs 121.03 grams. Nearly identical pieces of food. What differs is how many of them come out of the box.

Multiply through and the two 14-inch pizzas separate hard:

| Domino's cheese pizza | Serving as published | Calories | Slice weight | Whole pie | |---|---|---|---|---| | Medium 12" Hand Tossed | 1 slice (1/8 of pizza) | 210 | 85 g | 681 g | | Large 14" Thin Crust | 1/8 of pizza | 210 | 87 g | 695 g | | Large 14" New York Style | 1 slice (1/6 of pizza) | 280 | 120 g | 720 g | | Large 14" Hand Tossed | 1 slice (1/8 of pizza) | 290 | 121 g | 968 g | | Extra Large 16" Hand Tossed | 1 slice (1/8 of pizza) | 380 | 158 g | 1,265 g |

Two 14-inch cheese pizzas from the same company, 968 grams and 720 grams. That gap is 248 grams, roughly eight and three-quarter ounces of food, hiding behind an identical diameter.

The Thin Crust row deserves a note. Domino's does not call it a slice. Its serving reads "1/8 of pizza," with the word dropped.

An 18-inch pizza holds 2.25 twelve-inch pizzas, not one and a half

People compare pizzas by diameter because diameter is the number printed on the menu. Area is what you eat, and area runs on the square of the radius.

• 12-inch pizza: 113.10 square inches
• 14-inch pizza: 153.94 square inches
• 16-inch pizza: 201.06 square inches
• 18-inch pizza: 254.47 square inches

An 18-inch pizza is 50 percent wider than a 12-inch and holds exactly 2.25 times the food. Eighty-one over thirty-six. The ratio is clean enough to do in your head, and almost nobody does.

USDA publishes no 18-inch record, so this next part is my arithmetic, not an agency figure. I will show it. Take the 853-gram, 14-inch pie and spread it over its own 153.94 square inches: 5.54 grams of pizza per square inch. Apply that to 254.47 square inches and an 18-inch pie comes to about 1,410 grams, a little over three pounds, and roughly 3,750 calories.

| 18-inch cheese pizza, cut into | Slice weight | Slice calories | |---|---|---| | 6 | 235 g | 625 | | 8 | 176 g | 469 | | 10 | 141 g | 375 | | 12 | 118 g | 313 |

Run the same density down to twelve inches and you get about 627 grams and 1,667 calories for the whole pie. Cut that 12-inch into six and each piece is 104 grams and 278 calories, which is within three grams and seven calories of a slice off a 14-inch cut into eight. A sixth of a small pizza and an eighth of a large one are, for counting purposes, the same slice.

How much should you trust a derivation? Partly. Domino's real 12-inch Hand Tossed weighs 681 grams against my 627, so the method lands about eight percent light on that pizza, mostly because a hand-tossed rim does not thin out as the pie grows. Treat the 18-inch numbers as a good bracket, not a scale reading.

What a chain must disclose, and what it may leave out

Chain menu calorie counts exist because of federal law: 21 CFR 101.11, the FDA's menu labeling rule, published 1 December 2014 with a compliance date of 7 May 2018. It covers any "restaurant or similar retail food establishment that is a part of a chain with 20 or more locations doing business under the same name."

The rule contains a passage that reads like it was written for this exact question. For multiple-serving items, calories must be declared "for the whole menu item... (e.g., 'pizza pie: 1600 cal'); or per discrete serving unit as long as the discrete serving unit (e.g., pizza slice) and total number of discrete serving units contained in the menu item are declared."

The regulation's own worked example is "pizza pie: 200 cal/slice, 8 slices." The government will not let a chain post a per-slice number without the cut count attached, because it means nothing on its own. That is the whole argument of this article, sitting in the Code of Federal Regulations.

Two things the rule also permits are worth knowing. Calories get rounded "to the nearest 10-calorie increment above 50," so a posted 290 is somewhere between 285 and 294. And chains may report the whole pie instead of the slice, which is what Little Caesars does.

The Little Caesars US nutrition guide, prepared by MenuTrinfo and dated 2026, lists a Large Classic Cheese pizza at 1,950 calories with 3,740 milligrams of sodium and 95 grams of protein. Those are whole-pizza totals. Nowhere in the pizza tables does the document say how many pieces you get.

You can recover the cut count from elsewhere in the same PDF, which I enjoyed more than I should have. The lunch combo section lists a "4-slice Detroit-Style Deep Dish Pepperoni pizza" at a low end of 1,390 calories. The whole Detroit-Style Deep Dish Pepperoni is 2,770. Half of 2,770 is 1,385, which rounds to 1,390. Four slices are half the pizza, so that pizza is cut into eight. The guide answers the question, just not in the table where you would look.

For the Large Classic round, dividing the published 1,950 by the customary eight cuts gives 244 calories a slice. I would call that solid, with one caveat: the cut count is convention, not something Little Caesars prints.

Domino's, for its part, states on its nutrition page that "there are 34 million different combinations available in ordering just one Domino's pizza." No single answer was ever going to cover that.

Adding pepperoni costs about ten calories, because the cheese comes off

Take that Large 14-inch Hand Tossed cheese slice at 290 calories and add pepperoni. The Cal-O-Meter returns 300. Ten calories for a topping made of cured pork fat.

The mechanism is in Domino's data file. On a large hand-tossed slice with no toppings, regular cheese weighs 37.21 grams and supplies 103.07 calories. Add one topping and regular cheese drops to 24.81 grams and 68.71 calories. The pepperoni itself contributes 8.86 grams and 40.23 calories. The kitchen takes away 12.4 grams of cheese worth 34 calories and gives back 40 calories of pepperoni. Net change, about six calories before rounding.

Domino's says so on the page, in a box titled "Confused About Calorie Counts?": "When you add a topping, the cheese portion of the pizza is reduced to ensure a proper bake."

The FDA saw this coming. Section 101.11 has a clause for it, requiring that where "the amount of the topping included on the basic preparation of the menu item decreases based on the total number of toppings ordered... (such as is sometimes the case with pizza toppings)," topping calories must be declared for a one-topping pizza specifically. Which means a second topping is worth less than the first, and a fourth less again. Domino's file confirms it: pepperoni is 40.23 calories on a one-topping large, 32.19 on a three-topping, 24.14 on a four-topping.

Density barely moves. Weight is the whole answer.

Run the calorie density across Domino's entire cheese line and the range is startlingly narrow: 234 calories per 100 grams for the 14-inch New York Style, 239 for the 16-inch Hand Tossed, 241 for the 14-inch Hand Tossed, 243 for both the 12-inch Hand Tossed and the 14-inch Thin Crust. Three diameters, three crusts, a spread of nine calories per 100 grams.

USDA's composite sits a little higher at 266, because it averages chains that use more cheese than Domino's does. Even so, the conclusion survives: cheese pizza is roughly 2.3 to 2.7 calories per gram, and the crust you choose barely touches that.

What moves is mass. An 85-gram slice and a 158-gram slice are both "one slice," and one is 170 calories heavier than the other. On my route the price of a box of cereal would sit unchanged for eleven months while the box quietly went from 18 ounces to 14. The tag was honest. The tag was also useless on its own. A pizza slice is the same object: a unit of language, not a unit of food.

Counting the slice actually in front of you

1. Read the diameter off the box or the menu. Ten, twelve, fourteen, sixteen, eighteen inches. If nothing is printed, measure the box; a pizza box is normally cut to the pizza's size.
2. Count the cuts in the whole pie, not the slices left. Six and eight are both common at fourteen inches, and they differ by a third.
3. Find the whole-pizza calorie figure and divide by the cut count. For chains this is published or recoverable. Little Caesars gives 1,950 for a Large Classic Cheese; eight cuts make 244 a slice.
4. If no whole-pie figure exists, weigh the slice and multiply by 2.3 to 2.7. A kitchen scale settles a homemade slice in four seconds, and it is the only method that works on a pizza nobody has published.

Questions people actually ask

How many slices of pizza equal 500 calories?

Between about one and a third and two and a half, depending on the pizza. At USDA's 285 calories for a 14-inch cheese slice, 500 calories is 1.76 slices. It is 1.3 slices of Domino's 16-inch Hand Tossed at 380 each, and 2.4 slices of their 12-inch at 210. By weight it is roughly 188 grams of regular-crust cheese pizza.

What do 400 calories of pizza look like?

Roughly 150 grams of regular-crust cheese pizza, or about one and a half USDA 14-inch slices. On Domino's menu it is almost exactly one slice of the 16-inch Hand Tossed at 380 calories, or nearly two slices of the 12-inch at 210 each. Same 400 calories, one piece or two, depending entirely on the pie.

How many calories are in a large pizza slice?

For a 14-inch cheese pizza cut into eight, 285 calories per USDA record 173292. Domino's Large 14-inch Hand Tossed cheese slice is 290, their New York Style is 280 for a sixth of the pie, and Little Caesars' Large Classic Cheese works out to 244 a slice from a published 1,950-calorie pizza.

How many calories are in a slice from an 18-inch pizza?

About 469 calories if the pie is cut into eight, 375 if cut into ten, and 313 if cut into twelve. These come from scaling USDA's measured 14-inch cheese pizza by area: an 18-inch pie covers 254 square inches and works out near 1,410 grams and 3,750 calories total. Toppings add from there.

How many calories are in a Domino's slice?

Between 210 and 380 for cheese, from Domino's own Cal-O-Meter. A Medium 12-inch Hand Tossed slice is 210, a Large 14-inch Hand Tossed is 290, a Large 14-inch New York Style is 280 for a sixth of the pizza, and an Extra Large 16-inch Hand Tossed is 380. Pepperoni adds about ten.

How many calories are in a Little Caesars slice?

About 244 for a slice of Large Classic Cheese and 288 for Large Classic Pepperoni, assuming the customary eight cuts. Little Caesars publishes whole-pizza totals rather than slice figures: 1,950 calories for the Classic Cheese, 2,300 for Classic Pepperoni and 2,500 for a Detroit-Style Deep Dish Cheese. Divide before you eat.