Calories in a Slice of Pizza
Calories in a slice of pizza usually land between 200 and 400 kcal for a typical 1/8 piece, because slice is a fraction of a pie — not a fixed weight. On USDA FoodData Central, one slice (107 g) of 14-inch regular cheese chain pizza is 285 kcal (12 g protein, 36 g carbohydrate, 10 g fat). Thin crust on the same diameter drops toward ~192 kcal; thick crust climbs toward ~312 kcal. Pepperoni on a regular 14-inch pie is often ~310 kcal. Name the pie before you log the slice.
Calories per slice by pie size and crust (USDA-style)
USDA publishes chain-pizza rows by diameter and crust type, assuming a standard eighth of the pie. Your shop may cut six slices instead of eight — each piece is then heavier than the table assumes.
| Pie diameter | Style | Approx. kcal / 1/8 slice | USDA slice weight (habit) |
|---|---|---|---|
| 14-inch | Thin cheese | ~192 | ~63 g (USDA thin row) |
| 12-inch | Regular cheese | ~210 | estimate from area |
| 14-inch | Regular cheese | 285 | 107 g (USDA regular row) |
| 14-inch | Regular pepperoni | ~310 | estimate on regular base |
| 14-inch | Thick cheese | ~312 | ~115 g (USDA thick row) |
| 14-inch | Deep dish cheese | ~360 | estimate — pan depth adds dough |
| 16-inch | Regular cheese | ~360 | estimate from area |
Stuffed crust, extra cheese, and a side of ranch are not in the table. One ranch cup can add 100–200 kcal. Olive oil on the crust or a garlic-butter dip is the same fat math as a tablespoon of oil (~119 kcal) when that is what was brushed on.
When the shop publishes a PDF, that sheet beats a guess — same habit as restaurant calorie estimates. When you know diameter and toppings, run them through the pizza calorie calculator and log that number before you decide on a second slice.
Key takeaway: USDA's anchor row is 285 kcal for one 107 g slice of 14-inch regular cheese. "A slice" without diameter is how 192 and 360 get treated as equals.
Why diameter and cut count beat the word "slice"
Pizza area scales with diameter squared. An eighth of a 16-inch pie is not "a bit more" than an eighth of a 12-inch pie — it is substantially more dough, sauce, and cheese.
Cut count matters as much as inches. Six slices from a large pie are each bigger than eight slices from the same pie. A personal pan cut into four can look like "two slices" and still be most of a small pie.
Worked example. You ate two slices of 14-inch regular cheese:
- One USDA slice: 285 kcal
- Two slices: 570 kcal — that can be a reasonable lunch
- Same person, two slices of 16-inch pepperoni plus garlic knots: often 900+ kcal before the drink
People search calories in slice of pizza because they want one number. The honest answer is a range plus diameter, crust, and how many ways the pie was cut.
Homemade pizza can run lighter when you weigh dough and cheese — see homemade meal calories for the method. Delivery pizza is built for pull and browning, which usually means oil in the pan.
If you only have a menu description (size, crust, toppings), the restaurant menu analyzer drafts a split. Then bump oil if the crumb looked wet.
Key takeaway: Inches and cut pattern decide the piece. The label slice does not — until you name the pie behind it.
Macros in one slice and what pizza is not
One USDA 14-inch regular cheese slice (285 kcal) carries about 12 g protein, 36 g carbohydrate, and 10 g fat. That is a mixed meal on one triangle — not a protein shake.
| Nutrient (14-inch regular cheese, 1 slice ~107 g) | Amount |
|---|---|
| Calories | ~285 kcal |
| Protein | ~12 g |
| Carbohydrate | ~36 g |
| Fat | ~10 g |
| Fiber | ~2.5 g |
Pizza is bread, cheese, and usually meat. Two measured slices and a salad you actually dressed lightly can fit a day. Four slices plus breadsticks is a different day.
The Dietary Guidelines for Americans still count those grains and protein foods. They also count oils. You do not need a punishment workout — you need the log to show the pieces you ate.
A sandwich lunch and pizza dinner is two bread-forward meals. That can be planned. It is messy when both were logged as "something small."
Key takeaway: One USDA cheese slice is ~285 kcal with ~12 g protein. Pizza can be lunch; four large slices plus extras is most of many people's daily energy.
How pizza slices get mis-logged in trackers
MyFitnessPal's first "pizza slice" hit might be a thin personal-pan row. Cronometer behaves better with a USDA 14-inch cheese item when that matches your plate. MacroFactor will scale grams if you weigh a leftover triangle. Garmin and Apple Health display a tidy dinner total that is 400 kcal light if you logged a 12-inch eighth and ate a 16-inch third.
| Before | After | What was wrong |
|---|---|---|
| "1 slice pizza," 200 kcal, twice | Two 14-inch regular cheese eighths | 400 → ~570 kcal |
| Thin-crust row for a fold-over shop slice | Large-diameter, regular crust | 210 → 300–400+ kcal |
| Two slices, no dips | Two slices + ranch cup + garlic knots | +200–400 kcal |
A Friday log that says "pizza, 600" after four large slices and a soda is not a rounding error. It is a missing pie.
If you only have a photo of the box, the meal analyzer can draft a split — then adjust oil if the crust shone.
This is educational food math, not medical advice. Cheese and processed meats carry sodium and saturated fat you may be watching for other reasons. The calorie line is still slice mass plus whatever was in the dip cup.
Key takeaway: Match the database row to the pie you ordered. Then add the ranch. Trackers cannot see the box.
Log a slice without lying to the diary
- Note diameter and cut (6 vs 8 vs "I cut it myself").
- Note cheese vs meat vs deep vs stuffed.
- Add visible oil, butter, and dips.
- Do not log a New York fold-over as a thin personal pan.
- Prefer the chain nutrition sheet when you have the exact pie.
Pizza is not a moral event. It is energy-dense bread. Two measured slices beat an "I'll be good tomorrow" rewrite more often than a new diet name.
When you know size and toppings, run them through the pizza calorie calculator — then decide whether the next slice is still lunch or already dinner.
Key takeaway: Diameter, cut, and crust first. Then toppings and dips. Slice is not a unit until those are named.