Hazelnuts are one of the lowest-carb nuts around, and their gentle effect on blood sugar makes them a smart snack for people managing diabetes, insulin resistance, or simply steady energy. This hazelnut glycemic load calculator converts any serving size into a single blood-sugar impact number: the glycemic load (GL). Instead of guessing how a handful of hazelnuts fits into your meal plan, you get a precise, evidence-based estimate in seconds.
Glycemic load combines the quality of carbohydrates (the glycemic index, or GI) with the actual quantity of carbs in your serving. Because hazelnuts are rich in fiber and healthy fats, their typical GI is very low — around 15 on the standard glucose scale. That means even a generous 100-gram serving produces a GL of barely 1.
Use the tool for whole or chopped hazelnuts, raw or dry-roasted, and compare portion sizes with the quick-fill buttons. You can also adjust the GI field to see how sweetened or coated nut products would change the load.
The commonly cited GI for hazelnuts is about 15. Adjust the GI field only if you are comparing a different nut or a sweetened product.
How to Use This Calculator
Start by entering the amount of hazelnuts you plan to eat in the Serving size box. You can type in grams, ounces, cups, or tablespoons; the unit dropdown converts your entry to grams automatically. Most people eat about 28–34 g per snack, which is roughly one ounce or a quarter cup, and the quick-fill buttons load those portions instantly. The Glycemic index field is pre-filled with 15, the commonly cited GI for raw and dry-roasted hazelnuts. Leave it as is unless you are testing a sweetened or chocolate-coated product. Click Calculate GL to see the glycemic load, net carbs, fiber, and a short step-by-step breakdown. Use Reset to clear the results and return to the default 30 g serving.
How Glycemic Load Is Calculated
The standard formula is GL = (GI × net carbs per serving) ÷ 100, where net carbs = total carbs − fiber. Hazelnuts contain about 16.7 g total carbohydrate and 9.7 g fiber per 100 g, leaving roughly 7 g of digestible carbs. For a 30 g handful, net carbs are about 2.1 g; with a GI of 15, GL = (15 × 2.1) ÷ 100 ≈ 0.32. Even a full 100 g portion gives (15 × 7.0) ÷ 100 ≈ 1.05, which is very low. For a high-GI comparison, see the whole-grain wheat glycemic load calculator.
Hazelnut Nutrition at a Glance
Raw hazelnut values are shown below; dry-roasted plain nuts are nearly identical. Source: USDA FoodData Central.
| Measure | Per 100 g | Per 1 oz (28 g) |
|---|---|---|
| Calories | 628 kcal | 176 kcal |
| Protein | 15.0 g | 4.2 g |
| Total fat | 60.8 g | 17.0 g |
| Total carbohydrate | 16.7 g | 4.7 g |
| Fiber | 9.7 g | 2.7 g |
| Net carbohydrate | 7.0 g | 2.0 g |
| Sugars | 4.3 g | 1.2 g |
Why Hazelnuts Keep Blood Sugar Steady
Hazelnuts are naturally low in digestible carbohydrates. More than half of their carbohydrate is fiber, which is not absorbed as glucose, and their high fat and protein content slows gastric emptying and carbohydrate absorption. Their sugar content is also modest. This combination gives hazelnuts one of the lowest glycemic responses among nuts. The trade-off is calories: 628 kcal per 100 g, so portions still matter for weight control. Pair a measured handful with fruit or yogurt for a balanced snack.
Frequently Asked Questions
Is the GI of hazelnuts really 15? Most published tables list a GI near 15, though values vary slightly with variety and testing methods. Even if the true GI were 20–25, a normal serving would still have a GL below 1.5, so the impact stays minimal.
Does roasting change the result? Dry roasting has little effect on plain hazelnuts. Honey-roasted, chocolate-covered, or candied products add sugar and should be entered using their label’s carbohydrate and fiber values, not plain-nut data.
Can I use this for hazelnut butter? If the butter is 100% hazelnuts with no added sugar, the numbers are almost identical. Commercial spreads often add sugar and fillers; use the label and consider the added sugar limit calculator to budget sweeteners.
What do the GL categories mean? GL under 10 is low, 11–19 moderate, and 20+ high. Hazelnut servings usually stay below 2, so they are a safe low-GL food for most meal plans.
Practical Tips for Adding Hazelnuts to Your Diet
Use chopped hazelnuts instead of croutons on salads, mix them into oatmeal or Greek yogurt, or blend them into smoothies. Hazelnut flour can also replace part of wheat flour in low-carb baking. Store nuts in an airtight container in a cool, dark place — or freeze them — to prevent the healthy fats from turning rancid. Choose raw, dry-roasted, or lightly salted versions, and keep added-sugar varieties for occasional treats.