How many grams in a cup of chopped pecans?

1 cup of chopped pecans weighs 109 g by USDA. King Arthur Baking lists 57 g per half cup of diced pecans, which is 114 g per cup. Pecan halves are 99 g per cup.

Sources: USDA FoodData Central, King Arthur Baking ingredient weight chart · Checked October 22, 2026

Amount

Unit

109 g 3.8 oz

Sources range from 109 g to 114 g for 1 cup.

Converting a whole recipe?

Sous Chef converts every ingredient in a recipe to grams and millilitres in one tap, rounded to amounts you would actually weigh.

Chopped pecans cups to grams table

Using 109 g per US cup. A US cup is 236.6 mL; 1 cup is 16 tablespoons.

Chopped pecans cups to grams
US cups	Grams	Ounces	Tablespoons
⅛ cup	14 g	0.5 oz	2
¼ cup	27 g	1 oz	4
⅓ cup	36 g	1.3 oz	5.3
½ cup	55 g	1.9 oz	8
⅔ cup	73 g	2.6 oz	10.7
¾ cup	82 g	2.9 oz	12
1 cup	109 g	3.8 oz	16
1½ cups	164 g	5.8 oz	24
2 cups	218 g	7.7 oz	32
3 cups	327 g	11.5 oz	48
4 cups	436 g	15.4 oz	64

Why sources disagree

Smaller pieces pack tighter, so chopped pecans weigh more per cup than halves: USDA lists 109 g chopped and 99 g for halves, and King Arthur lists 105 g for whole pecans. The 5 g gap on chopped pecans comes down to chop size. Pecans are a tree nut, one of the FDA's major allergens, so tell anyone you bake for.

Source	Listed as	Grams per cup
USDA FoodData Central Nuts, pecans	1 cup, chopped = 109 g	109 g
King Arthur Baking ingredient weight chart Pecans (diced)	½ cup = 57 g	114 g

Bold row is the figure the calculator uses. Figures listed for a smaller measure are multiplied up to one cup.

How to measure chopped pecans accurately

Use the Chopped or Halves setting to match how the recipe lists the pecans.
Pecans are a tree nut: label baked goods for guests with nut allergies.
Weigh on a digital scale when you can, since cup scoops vary from cook to cook.

Convert the whole recipe, not one line

Converting a recipe one ingredient at a time is where mistakes slip in. Sous Chef imports a recipe from a link or pasted text, then converts every ingredient at once: dry ingredients and butter to grams, liquids to millilitres. Tap again to go back to cups.

US recipe

2¼ cups all-purpose flour
1 cup butter, softened
¾ cup brown sugar, packed
1½ cups milk

In Sous Chef, after "Convert to metric"

275 g all-purpose flour
225 g butter, softened
170 g brown sugar, packed
350 ml milk

Example output. Sous Chef rounds to amounts you would actually weigh, so its numbers can differ by a few grams from the table above.

Common questions

How many grams is half a cup of chopped pecans?

Half a cup of chopped pecans is about 54.5 g, using 109 g per cup.

How many grams is 1 tablespoon of chopped pecans?

1 tablespoon of chopped pecans is about 7 g, since 1 cup is 16 tablespoons and 109 g per cup divided by 16 is 7 g.

How many grams is 1 cup of pecan halves?

1 cup of pecan halves weighs 99 g by USDA. King Arthur Baking lists whole pecans at 105 g per cup.

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