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Calories · Café & desserts

Calories in a slice of pecan pie

A typical restaurant serving of a slice of pecan pie (one regular slice, ⅛ of a 9-inch pie, about 150 g) is about 670 calories, usually 340–1,100.

Restaurant portions vary; this is a typical estimate, not a label. Also called slice of pecan pie, Southern pecan pie.

~670
Pecan pie

The usual range

Drawn on one 0–2,000 scale shared by every dish page, so plates compare at a glance.

Protein, carbs and fat

  • Protein9 g
  • Carbs74 g
  • Fat38 g

One serving

Serving
one regular slice, ⅛ of a 9-inch pie
Weight
~150 g
Per 100 g
~449

The dish

About a slice of pecan pie

Pecan pie is the richest of the holiday pies: USDA puts a regular slice, an eighth of a 9-inch pie, at about 670, nearly double pumpkin pie. The sweet syrup filling and the pecans, which are mostly fat, make up most of it.

Ways it comes

One dish, a few numbers

Pecan pie · rough numbers

  • Thin slice (75 g)~340
  • Store-bought slice (133 g)~540
  • Regular slice, ⅛ of a 9-inch pie~670
  • Large restaurant wedge (250 g)~1,100

What moves the number

Why one plate is 340 and another 1,100

  • The syrup and sugar filling
  • Pecans, which are mostly fat
  • Slice size
  • Ice cream or whipped cream on top

Ordering lighter

If you want a lighter plate

  • Take a thin slice
  • Share a slice
  • Skip the scoop of ice cream

Side by side

Next to other Café & desserts dishes

Café & desserts · typical restaurant servingAll about Café & desserts food →

  • Americano~10one 12 fl oz caffè americano, black (a US tall) · usually 5–80
  • Cappuccino~100one small café cappuccino, 12 fl oz · usually 60–180
  • Cold brew~110one 16 oz grande cold brew with vanilla sweet cream, as Starbucks makes it (black: 5) · usually 5–250
  • Iced coffee~150one medium 16 oz iced coffee with milk and sugar · usually 5–190
  • Flat white~170one 12 fl oz flat white with whole milk (a US tall) · usually 80–290
  • Chai latte~200one 16 fl oz café chai tea latte with 2% milk (a US grande) · usually 80–270
  • Lamington~210one bakery lamington, unfilled (about 70 g) · usually 150–400
  • Latte~210one medium café latte, 16 fl oz · usually 100–300
  • Mochi ice cream~210three pieces, about 35 g each · usually 140–330
  • Eggnog~230one cup (8 fl oz) of eggnog, without alcohol · usually 110–270
  • Glazed donut~250one medium glazed yeast donut · usually 190–450
  • Ice cream~250one generous parlor scoop in a cup · usually 130–500

In PlateDiary

A rough number for the dishes you save — only if you want one.

Off unless you turn them on

Calories in PlateDiary are off unless you turn them on. Switch them on and, when PlateDiary AI reads your photo of the table, each dish gets one rough “~” number. Accept it or change it; a number you correct is remembered for that dish. With Calories off, the app looks exactly as it did before.

A read sends small pictures of the cut-out dishes, with the place's name as a hint — never the table photo, faces or your location. Calorie numbers never go to analytics, and nothing is written to a health app. PlateDiary AI starts with free tries; here is how it works.

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How these numbers were made

Method and sources

Last reviewed

Restaurant portions and cooking vary, so these are typical estimates for one serving, built from the sources below. Treat it as a rough number: your plate may land anywhere in the range.

If you manage a health condition, ask a doctor or registered dietitian.

AI helped draft this page; every number was checked against the sources.

  1. USDA FoodData Central (FNDDS 2021–2023) — Pie, pecan (regular slice 150 g), FDC 2708015
  2. USDA FoodData Central (SR Legacy) — Pie, pecan, commercially prepared (slice 133 g), FDC 175021
  3. USDA FoodData Central (FNDDS 2021–2023) — Pie, pumpkin, FDC 2708011

Questions

Questions people ask.

How many calories are in a slice of pecan pie?

A typical restaurant serving of a slice of pecan pie (one regular slice, ⅛ of a 9-inch pie, about 150 g) is about 670 calories, usually 340–1,100. The number depends mostly on the portion and how it is cooked.

How many calories are in a slice of pecan pie?

About 670 for a regular slice (150 g, an eighth of a 9-inch pie). A thin slice is about 340.

Pecan pie or pumpkin pie: which has more calories?

Pecan, nearly double: about 670 against about 370 for the same slice of pumpkin pie.

Is store-bought pecan pie lighter?

A little: USDA lists commercial pecan pie at about 410 per 100 g, so a 133 g slice is about 540.

What changes the calories in a slice of pecan pie?

The syrup and sugar filling. Pecans, which are mostly fat.

How can I order a slice of pecan pie lighter?

Take a thin slice. Share a slice.

Can PlateDiary show calories for the dishes I eat out?

Yes, if you want it to: calories in PlateDiary are off unless you turn them on. Switch them on and each dish you save from a photo of the table gets one rough “~” number you can accept or change.