Pecans serving size, cups to grams
Here a serving of pecans is counted as 1 oz (28 g), with 198 calories and 2.8 g protein. One cup weighs 3.8 oz (109 g).
Serving sizes of pecans
Every household measure USDA weighs for this food, plus 1 oz and 100 g.
| Measure | Weight | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|---|
| 1 cup, chopped | 3.8 oz (109 g) | 763 calories | 10.9 g | 13.8 g | 79.9 g |
| 1 cup, halves | 3.5 oz (99 g) | 693 calories | 9.9 g | 12.6 g | 72.5 g |
| 1 oz | 1 oz (28 g) | 198 calories | 2.8 g | 3.6 g | 20.8 g |
| 100 g | 3.5 oz (100 g) | 700 calories | 10 g | 12.7 g | 73.3 g |
Cups to grams
USDA weighs 1 cup (chopped) of pecans at 109 g. Smaller cup measures follow from it.
| Measure | Weight | Calories |
|---|---|---|
| 1 cup | 3.8 oz (109 g) | 763 calories |
| 3/4 cup | 2.9 oz (82 g) | 572 calories |
| 2/3 cup | 2.6 oz (73 g) | 508 calories |
| 1/2 cup | 1.9 oz (54 g) | 381 calories |
| 1/3 cup | 1.3 oz (36 g) | 254 calories |
| 1/4 cup | 1 oz (27 g) | 191 calories |
Grams and ounces to cups
| Weight | Volume | Calories |
|---|---|---|
| 1 oz | 1/4 cup | 198 calories |
| 100 g (3.5 oz) | 1 cup | 700 calories |
| 1 lb (454 g) | 4 1/8 cups | 3173 calories |
What 3.5 oz (100 g) of pecans looks like
3.5 oz (100 g) of pecans is 3.5 oz, or about 1 cup. It has 700 calories, 10 g protein, 12.7 g carbs and 73.3 g fat.
How much pecans for 30 g of protein
There is 10 g of protein in 3.5 oz (100 g) of pecans, so 30 g of protein would take 10.6 oz (301 g), about 2 3/4 cups, with 2107 calories. It is not a practical way to reach a protein target.
Keep exploring
Sources
Weights and nutrition: USDA FoodData Central, food portions and nutrients (FoodData Central, April 2026 release, accessed 2026-10-14)
- Raw pecans (halves): Nuts, pecans, halves, raw, FDC ID 2346395 (Foundation Foods, published 2022-10-28) · full nutrition facts
- Kitchen measures (1 cup = 16 tbsp, 1 tbsp = 3 tsp): NDSU Extension, Ingredient Substitutions (FN198, J. Garden-Robinson, April 2013 edition). https://www.extension.purdue.edu/extmedia/HHS/HHS-784-W.pdf (accessed 2026-10-12)
How we calculate: each household measure is the gram weight USDA lists for this food. Calories and nutrients are the USDA values per 3.5 oz (100 g) scaled to that weight. 1 oz = 28.35 g and 1 lb = 453.6 g. Cup fractions are rounded to the nearest kitchen measure. A dash (—) means USDA reports no value. How we verify.