Pecan Pie Calories: Per Slice, Homemade vs Store-Bought

By USDA's recipe record, an eighth of a 9-inch homemade pecan pie has 503 calories, 64 g of carbs and 27 g of fat; cut the same pie in sixths and each slice is 670. Store-bought slices land in the same range: 510 calories for an eighth of a national frozen pie and 640 for a sixth of a supermarket bakery pie. Most of the sugar is added: a slice of the classic corn-syrup recipe carries about 58 g, more than the 50 g Daily Value for added sugars.

Homemade, ⅛ pie

503 kcal · 64 g carbs

Homemade, ⅙ pie

670 kcal · 85 g carbs

Store-bought slice

510–640 kcal

Added sugar, ⅛ pie

about 58 g homemade · 28 g frozen

PlateLens

logs the slice you cut, with ice cream or whipped cream, from a photo or a sentence

Pecan pie calories per slice: eighths, sixths and the slices USDA weighs

Pecan pie packs a lot of calories into each gram: USDA's record for a homemade pie puts it at 412 calories per 100 g, and its survey database at 449. After that, the knife decides.

Cutting the same pie into six pieces instead of eight adds 167 calories to every slice, and USDA's large survey slice is more than three times its small one, 1,122 calories against 337. Even the regular survey slice, 150 g, comes to 674 calories, more than an eighth of the homemade pie, so a slice cut at the table is worth sizing rather than assuming.

Homemade pecan pie: where the calories come from

Karo's Homemade Pecan Pie, the classic corn-syrup recipe published by the syrup's maker, makes 8 servings from 1 cup of corn syrup, 3 eggs, 1 cup of sugar, 2 tablespoons of butter, a teaspoon of vanilla, 1½ cups (6 oz) of pecans and a 9-inch deep-dish crust. Adding USDA's values for each ingredient gives the pie's total before it goes into the oven:

The corn syrup and the sugar supply 40% of the pie's calories, 1,739 of about 4,400; the pecans supply 27% and the crust 24%. An eighth of Karo's pie comes to about 550 calories against 503 in USDA's recipe record: the slice is the same fraction of a 9-inch pie, and the recipe and the deep-dish crust account for the difference. The nuts themselves are 196 calories an ounce, about 19 halves.

Store-bought pecan pie: frozen and bakery labels

Packaged pies print their own serving, and the fraction changes from one box to the next:

The whole Marie Callender's pie is 4,080 calories in eighths and the Whole Foods Market pie 3,840 in sixths, so the bakery slice is 130 calories bigger although its pie holds fewer calories in all. A frozen pie's box gives you the eighth; a bakery pie cut at home is only as big as the slice you cut.

Ice cream or whipped cream on top

Whipped cream barely moves a slice; ice cream can add half of it again. By USDA's numbers:

An eighth of homemade pie with 2 tbsp of whipped cream is 518 calories. The same eighth with ½ cup of vanilla ice cream is 640, and a sixth with ½ cup of rich vanilla ice cream reaches 936, almost twice the first plate.

Sugar per slice

Labels list added sugars against a Daily Value of 50 g, the figure the FDA uses on every Nutrition Facts panel. An eighth of Marie Callender's pie carries 28 g of added sugars, 56% of it; a sixth of the Whole Foods Market pie carries 36 g, 72%; and an eighth of Karo's homemade recipe about 58 g, 115%, nearly all of it from the corn syrup and the cup of sugar. The new edition of the Dietary Guidelines for Americans, published at RealFood.gov, goes further and does not recommend added sugars at all. Halloween candy calories measures fun-size candy against the same 50 g.

Pecan pie vs pumpkin pie and the other pies

Pecan has the most calories of the homemade pies USDA lists, both per slice and per 100 g. USDA weighs each eighth of a 9-inch pie separately, so the per-100 g column is the fairer comparison:

A slice of pecan costs 187 calories more than the same slice of pumpkin; pumpkin pie calories breaks the pumpkin slice down, and Thanksgiving dinner calories adds up the plate that comes before dessert.

Logging a slice of pecan pie the way it was cut

A slice of pecan pie is hard to pin down: the same pie gives 503-calorie eighths or 670-calorie sixths, and USDA's survey slices run from 337 to 1,122. PlateLens logs the slice from a photo, or when you say something like “a sixth of a pecan pie with a scoop of vanilla ice cream”, and a boxed pie can be logged from its barcode. Fix it takes a change in plain words: “it was a thin slice, and whipped cream instead.” The Dietary Assessment Initiative’s pre-registered validation study recorded a ±1.1% mean calorie error for PlateLens’s photo logging over 180 weighed meals, and the open-source Foodvision Bench has also reproduced it on 231 meals in the public leaderboard it keeps on GitHub: an average across meals, not a promise for any single slice.

Frequently Asked Questions

Where these numbers come from

• U.S. Department of Agriculture, Agricultural Research Service, FoodData Central, downloaded on 31 October 2026. Its values are per 100 g; each slice, topping and ingredient amount scales them by its weight in grams, with rounding left to the end. SR Legacy (2018): pecan pie prepared from recipe 172786 (“1 piece (1/8 of 9″ dia)”, 122 g) and commercially prepared 175021 (“1 slice”, 133 g); pies prepared from recipe: cherry 172781, mince 175019, apple 175012, banana cream 172777, lemon meringue 175018, pumpkin 172788; recipe ingredients: light corn syrup 168837, granulated sugar 169655, whole egg 171287, salted butter 173410, vanilla extract 173471, pecans 170182, deep-dish frozen pie crust, unbaked 167523; toppings: whipped cream topping, pressurized 170860, frozen dessert topping 170868, vanilla ice cream 167575, rich vanilla ice cream 167573.
• FoodData Central, FNDDS 2021–2023 survey foods: pie, pecan (2708015), with its small (75 g), regular (150 g) and large (250 g) slices and its regular 8–9″ pie (1,200 g).
• Karo, Homemade Pecan Pie (8 servings), read 31 October 2026. Its calories here are computed from the USDA ingredient records above; Karo does not publish them on the recipe.
• Label values read 31 October 2026: Marie Callender's Southern Pecan Pie (SmartLabel, UPC 612781102202) and the Whole Foods Market Pecan Pie product page.
• US Food and Drug Administration, Daily Value on the Nutrition and Supplement Facts Labels: added sugars, 50 g. Dietary Guidelines for Americans, new edition at RealFood.gov, read 31 October 2026.
• Slice fractions, whole-pie totals, shares of the recipe's calories, toppings added to slices and percentages of the Daily Value are arithmetic on the figures above. None of these brands is affiliated with PlateLens, and labels change: the box in your hands is the one that counts.