A typical serving of Brussels sprouts (1 cup, 88 g) has about 38 calories. Per 100 g: 43 kcal, 3.4 g protein, 9 g carbs, 0.3 g fat. The same 100 g carries 3.8 g of fiber and 2.2 g of sugar. Most of the energy comes from carbohydrate.
| Serving | Weight | Calories |
|---|---|---|
| 1 cup | 88 g | 38 kcal |
| 1 sprout | 19 g | 8 kcal |
| 100 g | 100 g | 43 kcal |
Roasting adds oil, not sprout: the vegetable itself is 43 kcal per 100 g. On the energy-density scale, 43 kcal per 100 g puts Brussels sprouts at the very low end. Protein density is strong: about 7.9 g of protein per 100 calories.

A typical serving (1 cup, 88 g) has about 38 calories, and 100 g has 43 kcal. Calories scale with weight, so double the portion means double the number.
There are 3.4 g of protein in 100 g of Brussels sprouts, which works out to about 3 g per serving (1 cup). Treat it as an energy source rather than a protein source.
There are 9 g of carbohydrate per 100 g of Brussels sprouts, or about 8 g in 1 cup (88 g).
Every value on this page comes from USDA FoodData Central, entry 170383 (SR Legacy). Serving figures are converted from the per-100-g data, so rounding can shift a total by a calorie or two.
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Nutrition data: USDA FoodData Central, FDC ID 170383 (SR Legacy). Serving calories are computed from the per-100-g values.