Calories in walnuts

USDA data · Updated October 12, 2026

Walnuts (1 oz, 28 g) has 185 calories, with 4.3 g of protein, 3.9 g of carbohydrates and 18.5 g of fat. Per 100 g, that's 654 kcal.

Values are for Nuts, walnuts, english. Amounts vary with size, variety and preparation.

Walnuts

Per 1 oz (28 g)

Calories185

Protein4.3 g

Carbohydrates3.9 g

Fiber1.9 g

Sugars0.7 g

Fat18.5 g

Sodium1 mg

Source: USDA FoodData Central.

Calories in walnuts by serving

Serving	Weight	Calories	Protein	Carbs	Fat
100 g	100 g	654	15.2 g	13.7 g	65.2 g
1 cup, chopped	117 g	765	17.8 g	16 g	76.3 g
1 cup, ground	80 g	523	12.2 g	11 g	52.2 g
1 cup, in shell, edible yield (7 nuts)	28 g	183	4.3 g	3.8 g	18.3 g
1 cup shelled (50 halves)	100 g	654	15.2 g	13.7 g	65.2 g
1 cup pieces or chips	120 g	785	18.3 g	16.5 g	78.3 g
1 oz (14 halves)	28 g	185	4.3 g	3.9 g	18.5 g

Where the calories come from

Protein 9%Carbs 8%Fat 83%

Walnuts has a high energy density (6.5 kcal per gram). It provides 2.3 g of protein per 100 kcal.

Nuts & seeds: calories compared

Per 100 g	Calories	Protein	Carbs	Fat
Chia seeds	486	16.5 g	42.1 g	30.7 g
Cashews	553	18.2 g	30.2 g	43.9 g
Peanuts	587	24.4 g	21.3 g	49.7 g
Peanut butter	598	22.2 g	22.3 g	51.4 g
Almonds	598	21 g	21 g	52.5 g
Walnuts	654	15.2 g	13.7 g	65.2 g

Log it in seconds

In C for Calories, photograph your plate and walnuts is estimated along with everything else on it, or search for it and enter the amount in grams. For packaged versions, scan the barcode to use the label.

Source: U.S. Department of Agriculture, Agricultural Research Service. FoodData Central, SR Legacy, FDC ID 170187. Calories are rounded to the nearest whole number and nutrients to one decimal place.

FAQ

Frequently asked questions

How many calories are in walnuts?

185 calories in 1 oz (28 g), or 654 calories per 100 g.

How much protein is in walnuts?

4.3 g of protein in 1 oz (28 g) (15.2 g per 100 g).

How many carbs are in walnuts?

3.9 g of carbohydrates in 1 oz (28 g), including 1.9 g of fiber.