Walnuts
654 kcal per 100g
Walnuts has 654 kcal per 100 g, and 1 oz (28 g) comes to about 183 kcal, with 4.3 g protein, 3.8 g carbs and 18 g fat. Values are for shelled walnut halves. A small handful (28 g) is a realistic portion. Nuts are calorie-dense, so weigh rather than estimate by eye.
Kairo logs Walnuts from a photo: the app estimates the portion on the plate and fills in calories and macros from reference data, no typing needed.
Your portion
Type the grams or the calorie budget you have left.
- 15 g
- Protein
- 14 g
- Carbs
- 65 g
- Fat
100 g ≈ 33 % of a 2,000 kcal reference intake. Work out your own daily need
Nutrition Facts
Serving size: 100g
Compare with: Almonds · Cashews · Chia Seeds
Health Info
Walnuts are one of the few plant foods with a significant amount of ALA omega-3 fatty acids, about 2.5g per 28g serving. Regular consumption has been linked in randomized trials to improvements in LDL cholesterol and inflammatory markers. They are calorie-dense, so portion control matters.
Macros per 100g
Values per 100 g are based on recognised nutrition reference data. Last reviewed: May 2026. View sources
Track Walnuts in Kairo
Just photograph it. Kairo's AI reads the portion and the nutrition. Three seconds later the calories and macros are in your log, no typing.
Get Kairo on the App StoreFrequently Asked Questions
- How many calories are in Walnuts?
- Walnuts has 654 kcal per 100 g. A typical 28 g serving contains about 183 kcal.
- How much protein is in Walnuts?
- Walnuts provides 15.2 g of protein per 100 g.
- How many carbs are in Walnuts?
- Walnuts contains 13.7 g of carbohydrates per 100 g, of which 2.6 g is sugar.
- How much fat is in Walnuts?
- Walnuts contains 65.2 g of fat per 100 g. It also provides 6.7 g of fiber per 100 g.
- Is Walnuts good for weight loss?
- Walnuts is calorie-dense at 654 kcal per 100 g, so keep portion sizes in check when losing weight. Its 15.2 g of protein per 100 g also helps with satiety.
- Can I log Walnuts in Kairo from a photo?
- Yes, photograph the plate and Kairo estimates the portion of Walnuts, then logs calories and macros from reference data. If the portion looks off, you can adjust the grams and the numbers update.