Hazelnuts: calories and nutrition facts
Calories in hazelnuts per 100 g and per typical portion, from the MacroLab food catalog.
628kcal per 100 g
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To burn these 628 calories:
- 146minWalking (5 km/h)
- 62minRunning (8 km/h)
- 75minCycling (16–19 km/h)
- 85minSwimming
Times use the MET equation for a 70 kg adult. Actual burn varies with your weight, age and pace.
Calories per portion
Common portions from the MacroLab catalog, next to the 100 g reference.
| Portion | kcal |
|---|---|
| 100 g | 628 |
| 1 piece (1.3 g) | 8 |
Can hazelnuts make you gain weight?
At 628 kcal per 100 g, this is a food with high energy density: just 16 g gives 100 kcal.
Calories add up fast in a small volume, so measuring helps: 100 g already has 628 kcal.
No single food makes you gain weight. What matters is your total calories over days and weeks compared with what you burn.
Hazelnuts vs other foods in “Nuts and seeds”
It has 6% more calories than the average food in “Nuts and seeds” (592 kcal per 100 g).
| Per 100 g | This food | Group average |
|---|---|---|
| Energy | 628 kcal | 592 kcal |
Related foods
Frequently asked questions
- How many calories are in 100 g of hazelnuts?
- 100 g has 628 kcal. That means about 16 g for every 100 kcal.
Log hazelnuts with a photo in MacroLab
Snap your plate and MacroLab estimates calories and macros, then keeps your daily targets up to date.
Data from the MacroLab food catalog, updated September 26, 2026. Values vary by variety and brand; check the label of the product you buy.