How many calories are in walnuts?

One 1 oz of walnuts (28 g) has about 183 calories. Per 100 g, walnuts has 654 calories.

How much protein is in walnuts?

A 1 oz serving of walnuts provides roughly 4.2 g of protein (15 g per 100 g).

What are the macros for walnuts?

Per 1 oz: 4.2 g protein, 3.9 g carbs and 18.2 g fat — that's roughly 9% protein, 8% carbs and 83% fat by calories.

How do I log walnuts without weighing it?

Take a photo of your plate in CalorieScan AI. The app recognises walnuts, estimates the portion, and returns calories and macros in about three seconds — then you can fine-tune it in plain English ("make that two servings").

Legumes, Nuts & Seeds · Nutrition facts

🌰Calories in Walnuts

A 1 oz of walnuts (28 g) has 183 calories, with 4.2 g protein, 3.9 g carbs and 18.2 g fat.

Calories

183

Protein

4.2 g

Carbs

3.9 g

Fat

18.2 g

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Walnuts nutrition by serving size

Serving	Calories	Protein	Carbs	Fat
1 oz	183	4.2 g	3.9 g	18.2 g
100 g	654	15 g	14 g	65 g
1 oz (28 g)	185	4.3 g	4 g	18.4 g
1 cup (≈225 g)	1472	33.8 g	31.5 g	146.3 g
200 g	1308	30 g	28 g	130 g

Values are approximate, rounded from USDA FoodData Central and OpenFoodFacts references. Real plates vary — that's exactly why CalorieScan AI lets you correct any estimate in plain English.

Macro breakdown

Protein 9%Carbs 8%Fat 83%

Per 100 g: 654 cal
Per 1 oz: 185 cal
Fiber: 6.7 g / 100 g

Compare

Walnuts vs other legumes, nuts & seeds

Walnuts vs Pecans Walnuts vs Almond Butter Walnuts vs Macadamia Nuts Walnuts vs Peanut Butter Walnuts vs Sunflower Seeds Walnuts vs Almonds

Frequently asked

How many calories are in walnuts?
One 1 oz of walnuts (28 g) has about 183 calories. Per 100 g, walnuts has 654 calories.
How much protein is in walnuts?
A 1 oz serving of walnuts provides roughly 4.2 g of protein (15 g per 100 g).
What are the macros for walnuts?
Per 1 oz: 4.2 g protein, 3.9 g carbs and 18.2 g fat — that's roughly 9% protein, 8% carbs and 83% fat by calories.
How do I log walnuts without weighing it?
Take a photo of your plate in CalorieScan AI. The app recognises walnuts, estimates the portion, and returns calories and macros in about three seconds — then you can fine-tune it in plain English ("make that two servings").

More legumes, nuts & seeds

🌰 Pecans 🌰 Almond Butter 🌰 Macadamia Nuts 🥜 Peanut Butter 🌻 Sunflower Seeds 🌰 Almonds 🥜 Peanuts 🥜 Pistachios

Stop looking up calories.

Snap a photo of walnuts — or any meal — and CalorieScan AI does the math. Free on iPhone.

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