Brussels sprouts are surprisingly low in carbohydrates for such a hearty vegetable, which makes them popular on low-carb and keto meal plans. This Brussels carbs calculator lets you convert almost any serving size — whole sprouts, grams, ounces, or cups — into the carbs you’ll actually eat.
Using standard USDA reference values, the calculator accounts for your preparation method (raw, boiled, or roasted) and reports total carbohydrates, fiber, net carbs, and calories. It also includes a simple daily-value comparison so you can see how a serving fits into your day.
Whether you’re counting carbs for diabetes management, following a keto or low-carb diet, or just trying to understand your vegetable intake, this tool gives you a clear, accurate number in seconds.
🥦 Brussels Sprouts Carb Calculator
Serving Amount
Cooking Form
How the Calculation Works
The calculator uses USDA FoodData Central nutrition values per 100 grams of edible portion, adjusted for cooking method. For raw Brussels sprouts, 100 g contains about 8.95 g total carbohydrate, 3.8 g dietary fiber, and 43 calories. Boiled or steamed sprouts contain about 7.1 g total carbs and 2.6 g fiber per 100 g because they absorb water, while roasted sprouts fall between raw and boiled in carb concentration due to moisture loss during dry heat.
Unit factors are 1 for grams, 28.35 for ounces, 16 g for a medium raw Brussels sprout, and 88 g for a cup of chopped raw sprouts. If you are eating a different sprout size from the medium average, weigh your portion once; the difference between small and large sprouts can be 10 g or more.
Step-by-Step Example
You eat 10 medium Brussels sprouts, roasted. The calculator converts 10 sprouts × 16 g = 160 g. For roasted sprouts (7.9 g carbs/100 g), total carbs are 160 ÷ 100 × 7.9 = 12.6 g, fiber is 160 ÷ 100 × 3.0 = 4.8 g, and net carbs are 12.6 − 4.8 = 7.8 g. Calories come to 160 ÷ 100 × 40 = 64 kcal.
A smaller serving of 5 boiled sprouts (about 80 g) would give 80 ÷ 100 × 7.1 = 5.7 g total carbs and 80 ÷ 100 × 2.6 = 2.1 g fiber. That leaves roughly 3.6 g net carbs, a very small impact on most daily carb budgets.
Brussels Sprouts Carb Reference Table
Typical values per 100 g and per common serving:
| Form | Serving | Total carbs | Fiber | Net carbs | Calories |
|---|---|---|---|---|---|
| Raw | 100 g | 8.95 g | 3.8 g | 5.2 g | 43 |
| Raw | 1 cup (88 g) | 7.9 g | 3.3 g | 4.5 g | 38 |
| Raw | 5 medium sprouts (80 g) | 7.2 g | 3.0 g | 4.1 g | 34 |
| Boiled | 100 g | 7.1 g | 2.6 g | 4.5 g | 36 |
| Boiled | 1 cup (155 g) | 11.0 g | 4.0 g | 7.0 g | 56 |
| Roasted | 100 g | 7.9 g | 3.0 g | 4.9 g | 40 |
Values are rounded approximations from USDA data; exact figures vary slightly by variety, harvest season, and cooking time.
Net Carbs and Low-Carb Diets
Net carbs subtract dietary fiber because fiber is not digested into glucose. Brussels sprouts are one of the most keto-friendly cruciferous vegetables: a generous 120 g serving of boiled sprouts nets only about 5–6 g of carbs. That makes them a better choice than starchy sides like potatoes or rice.
If you also track carbs in legumes and other vegetables, the beans net carbs calculator uses the same total-minus-fiber approach for beans.
Common Mistakes to Avoid
- Weighing before vs. after cooking. Sprouts lose or gain water during cooking. Use the form selector that matches how you are eating them, and weigh the final cooked portion.
- Confusing total carbs and net carbs. A label or app might show total carbs; if you are using net carbs for keto, you must subtract dietary fiber.
- Adding carb-heavy sauces. Cream sauces, honey, dried cranberries, and even some vinaigrettes add significant carbs.