The calorie content in Hazelnuts varies based on the serving size as well as the form in which it is being consumed. There are 183 calories in 28 grams of hazelnuts and 655 calories in 100 grams of hazelnuts. Other micronutrients in a 100 grams serving of hazelnuts include carbohydrates 5.8 grams, proteins 15.4 grams, fat 63.5 grams and fiber 6.5 grams. One cup of chopped hazelnuts contains 722.2 calories out of which 628.8 calories come from fat. The total fat content in an equal quantity of hazelnuts is 69.9 grams out of which 5.1 grams are saturated fat, 9.1 grams are polyunsaturated fat and 52.5 grams are monounsaturated fat. The potassium content in a 100 grams serving of hazelnuts is 782 mg.
Hazelnuts also have carbohydrates and proteins and the amount of these two micronutrients in a 100 grams serving of hazelnuts is 19.2 grams and 17.2 grams respectively. Hazelnut is also a rich source of Copper, Magnesium, Phosphorous, Iron, Calcium, Vitamin C, Vitamin B 6, Vitamin E and Zinc.
The calorie content in hazelnuts also varies based on whether it is consumed in the ground form or whole. The quantity of other micronutrients also varies based on this factor. One cup of ground hazelnuts which weigh around 75 grams contain 471 calories. The total fat content in an equal quantity of hazelnuts is 45.56 grams, total carbohydrates are 12.52 grams and protein content is 11.21 grams. On the other hand one cup of whole hazelnuts weighs around 135 grams and contains 847.8 calories.
The total fat content in it is 82.01 grams, carbohydrates are 22.54 grams and total proteins content is 20.18 grams. Consuming 21 whole kernels of hazel nuts which would amount to a total of 28.35 grams would give 178 calories. The total fat content in an equal quantity of hazelnut is 17.22, carbohydrates are 4.73 grams and protein content is 4.23 grams.