Brussels sprouts are a naturally low-sugar vegetable, but the exact amount in your serving depends on how the sprouts are prepared and how much you weigh out. Most people tracking carbohydrates, sugar, or calories for diabetes, keto, or general healthy eating don't need to avoid Brussels sprouts — but knowing the precise grams of sugar can make food logging more accurate and help you stay within your daily target.
This calculator lets you enter a serving size in grams, ounces, or cups, choose a preparation style such as raw, boiled, or frozen, and instantly see the sugar content scaled to 100 g. It also shows what that serving contributes toward a typical 50 g daily sugar limit when the option is enabled.
Use the built-in USDA-based values, or switch to a custom sugar-per-100 g value from your own nutrition label or recipe database.
Brussels Sprouts Sugar Calculator
Find the sugar content in a serving of Brussels sprouts, scaled to 100 g.
Step-by-Step Guide
Using this calculator takes just a few seconds. First, enter the amount of Brussels sprouts you plan to eat. If your scale is set to ounces or you are measuring with cups, choose the matching unit and the tool converts it to grams automatically (1 oz = 28.35 g; 1 cup of shredded raw sprouts ≈ 88 g). Next, select how the sprouts are prepared. The calculator applies a typical sugar density for raw, boiled, or frozen product, or you can enter a custom value from a label. Finally, press Calculate sugar to see both the sugar in your serving and the sugar per 100 g.
- Enter the amount in grams, ounces, or cups.
- Choose the preparation or select Custom to type your own value.
- Optional: keep the daily sugar limit checkbox on to see the percentage of a 50 g limit.
- Click Calculate sugar and read the result box and step-by-step breakdown.
The Math Behind It
The formula is simple: total sugar = serving weight in grams × (sugar per 100 g ÷ 100). For example, a 150 g serving of raw Brussels sprouts with 2.2 g sugar per 100 g contains 150 × (2.2 ÷ 100) = 3.3 g of sugar. If you measure in ounces or cups, the tool first converts the amount to grams, then applies the same formula.
This is why per-100 g values are useful: they standardize the comparison. A cup of chopped sprouts is not the same weight as a cup of whole sprouts, so scaling to 100 g gives a consistent nutrient baseline.
Typical Sugar Values
The values below are estimates based on the U.S. Department of Agriculture's FoodData Central and are the same defaults used in this calculator. Always check the package label when available.
| Form | Typical sugar per 100 g | Notes |
|---|---|---|
| Raw Brussels sprouts | ≈ 2.2 g | Standard USDA reference value |
| Boiled, drained | ≈ 1.7 g | Some sugar can be lost into cooking water |
| Frozen, unprepared | ≈ 2.4 g | Check labels for added sugar |
| Roasted, no added sugar | ≈ 2.2 g | Closely matches raw value |
For government nutrient data, see USDA FoodData Central. For general background on the vegetable, the Wikipedia article on Brussels sprouts is a helpful overview.
Common Mistakes to Avoid
- Using cup measures too casually. The weight of a cup changes with shred size and how tightly it is packed. Weighing is far more accurate for nutrition logging.
- Forgetting added sugar. Frozen sprouts with glaze, honey-roasted products, or Brussels sprouts cooked with sweet sauces can contain much more sugar than the plain vegetable. Always choose the custom value and enter the label amount.
- Confusing total carbohydrate with sugar. Sugar is only part of total carbs. Brussels sprouts also contain fiber and starch, so the numbers are not interchangeable.
- Using cooked values for raw weights. If you weigh sprouts after boiling, the water content has changed. Use the boiled density for that weight, not the raw value.
Frequently Asked Questions
Are Brussels sprouts high in sugar? No. With roughly 2.2 g of naturally occurring sugar per 100 g, they are a low-sugar vegetable. For comparison, many fruits contain 10–15 g per 100 g, and soft drinks contain around 10–11 g per 100 ml.
Why does boiling lower the sugar value? During cooking, some sugars and other water-soluble compounds leach into the cooking water. The change is small, but it can be meaningful if you cook a large batch.
Do I need to count this sugar if I follow keto or low-carb? You should count it for precise tracking, but the impact is small: a 100 g serving contributes only about 2.2 g of sugar and roughly 4 g of net carbohydrates after fiber. If you're also logging other nutrients, you might find the Brussels sprouts potassium calculator or the Brussels sprouts vitamin C calculator useful.
What is the daily sugar limit? The 50 g value used here is a common reference, close to the World Health Organization's guidance that free sugars should be less than 10% of daily energy intake for adults. The tool uses it only as a convenient benchmark; whole vegetables like Brussels sprouts are not the main source of added sugars in most diets.