One cup of raw Brussels sprouts has about 8 g of carbs, including about 3 g of fiber.
Brussels sprouts are small, hearty, and easy to toss into almost any meal. If you track carbs, the tricky part isn’t the sprouts. It’s the serving size. A cup of raw sprouts weighs far less than a cup of boiled sprouts, and that changes the number you log.
There’s no mystery trick here. Once you know the weight behind a “cup,” the math stays steady.
Below are the carb numbers people ask for most, plus a simple way to calculate carbs for the portion you eat each time.
Carbohydrates in Brussels sprouts by serving size and prep
Most nutrition databases list vegetables by weight. That’s great for consistency, but many kitchens use cups, handfuls, and “a few sprouts.” The fix is to connect those everyday measures back to grams.
The numbers in this article come from USDA FoodData Central entries for three common forms: raw, cooked boiled and drained, and frozen cooked boiled and drained.
Raw Brussels sprouts
A cup of raw Brussels sprouts weighs about 88 g. In that cup, total carbohydrate lands near 7.9 g, with dietary fiber around 3.3 g. Total sugars sit around 1.9 g, so most of the carbs are fiber plus a small mix of starch and sugar.
If you shred sprouts for slaw, nothing magical happens to carbs. Cutting changes volume, not grams.
Boiled Brussels sprouts that are drained
Boiling softens sprouts and changes how they settle in a measuring cup. A cup of cooked, boiled, drained sprouts weighs about 156 g, nearly double the raw cup weight. That’s why the carb number per cup is higher.
In that cooked cup, total carbs land near 11.1 g and fiber near 4.1 g. If you’re subtracting fiber, carbs minus fiber lands near 7.0 g for that cooked cup.
Frozen Brussels sprouts, cooked, boiled, drained
Frozen sprouts are often trimmed and blanched before freezing. When cooked and drained, a cup weighs about 155 g. In the USDA entry used here, that cup shows total carbs around 12.9 g and fiber around 6.4 g.
Brand to brand, frozen veg can vary a bit. Still, the main takeaway is the same: Brussels sprouts are a low-carb vegetable, and serving size is what moves the needle.
What “total carbohydrate” means when you read a label
Total carbohydrate is a category that includes dietary fiber, total sugars, and starches. That’s true on packaged food labels and in nutrient databases that follow U.S. labeling terms.
Total carbs, fiber, sugars: how the lines fit together
Think of total carbs as the headline number. Fiber and sugars sit underneath it. Fiber is part of total carbs. Sugars are part of total carbs. Starches are also part of total carbs, even when a label doesn’t show starch as its own line.
For whole vegetables like Brussels sprouts, fiber makes up a large chunk of total carbs.
Why fiber changes how Brussels sprouts “feel” in a meal
Fiber isn’t fully digested, so it doesn’t behave like sugar in the body.
Where the carb numbers in this article come from
To keep this useful for meal tracking, the serving sizes and nutrients are based on USDA FoodData Central entries that list both nutrient values and household measures like “1 cup.” That makes it possible to convert between cups and grams without guessing.
The three entries used are: Brussels sprouts, raw; Brussels sprouts, cooked, boiled, drained, without salt; and Brussels sprouts, frozen, cooked, boiled, drained, without salt.
In the tables, values are rounded to one decimal place for readability. If you need exact decimals for a spreadsheet, pull the numbers straight from the USDA pages.
If you want the label wording straight from the source, the FDA’s Nutrition Facts “Total Carbohydrate” explainer lays out what’s included on that line and what the sub-lines mean.
Serving-size table for total carbs and fiber
This table is meant for easy meal math. It pairs the serving sizes people use with total carbs, fiber, and carbs minus fiber. If you don’t track carbs minus fiber, just use the total carbs column and ignore the rest.
| Serving and prep | Total carbs (g) | Fiber (g) and carbs minus fiber (g) |
|---|---|---|
| Raw, 1 sprout (19 g) | 1.7 | 0.7 (1.0) |
| Raw, 1 oz (28 g) | 2.5 | 1.1 (1.4) |
| Raw, 1 cup (88 g) | 7.9 | 3.3 (4.6) |
| Boiled and drained, 1 sprout (21 g) | 1.5 | 0.6 (0.9) |
| Boiled and drained, 1/2 cup (78 g) | 5.5 | 2.1 (3.4) |
| Boiled and drained, 1 cup (156 g) | 11.1 | 4.1 (7.0) |
| Frozen cooked and drained, 1 oz (28 g) | 2.3 | 1.2 (1.1) |
| Frozen cooked and drained, 1 cup (155 g) | 12.9 | 6.4 (6.5) |
Why a “cup of sprouts” changes after cooking
Cooking doesn’t create carbs. Water and volume shifts create the confusion. A measuring cup is a volume tool, not a weight tool, so the same cup can hold a different number of grams depending on texture and moisture.
If you’ve ever watched sprouts soften in a pot, you’ve seen this in real time. They go from firm to tender, and they pack into a cup more tightly.
Boiling adds water weight
Boiled sprouts can cling to water between leaves. If you scoop them straight from the pot, you may scoop extra water too. Draining well makes the number closer to the “drained” entry in the database.
If your sprouts are still glossy wet on the plate, expect your measured “cup” to weigh more than the database’s cup weight. A scale removes that guesswork.
Roasting shrinks volume
Roasting drives off water, so a cup of roasted sprouts can hold more cooked vegetable matter than a cup of boiled sprouts. That can push carbs per cup upward even when the raw weight you started with was the same.
If you track carbs by grams, roasting becomes easy to log. If you track by cups, roasted sprouts can be the hardest version to eyeball.
Steaming lands in the middle
Steamed sprouts often keep their shape better than boiled sprouts, so they can be less “packed” in a measuring cup. They also hold less surface water than boiled sprouts if you let them sit for a minute after cooking.
For tracking, you can use the boiled-and-drained numbers as a close stand-in if you don’t have a separate entry for steamed sprouts.
How to calculate carbs for the exact portion on your plate
If you want a repeatable method, use weight. It’s quick once you’ve done it a few times, and it’s forgiving when your sprouts vary in size.
Pick a matching entry and stick with it
Start by choosing one USDA entry that matches how you eat sprouts most often. Raw for salads and slaw. Boiled and drained for stovetop cooking. Frozen cooked and drained if that’s your staple.
Switching sources week to week can create noise in your log. Consistency beats hopping between databases.
Weigh what you eat after trimming
Trimming stems and removing outer leaves changes the edible weight. If you’re tracking, weigh the portion after trimming. If you cook a batch, weigh the cooked portion you serve yourself, not the whole pot.
A small kitchen scale is plenty. Put your bowl on the scale, hit tare, then add sprouts until you hit your target grams.
Use a simple formula
- Find total carbs per 100 g for your entry.
- Divide that number by 100 to get carbs per gram.
- Multiply by the grams you ate.
That formula works for fiber too. It also works for any vegetable once you have the per-100-gram values.
Quick calculator table for common gram amounts
This table turns grams into total carbs using the per-100-gram values implied by the USDA cup weights in the earlier section. Use it as a shortcut when you don’t feel like doing math mid-meal.
| Edible weight of sprouts | Total carbs if raw (g) | Total carbs if boiled and drained (g) |
|---|---|---|
| 25 g | 2.2 | 1.8 |
| 50 g | 4.5 | 3.6 |
| 75 g | 6.7 | 5.3 |
| 100 g | 9.0 | 7.1 |
| 125 g | 11.2 | 8.9 |
| 150 g | 13.5 | 10.7 |
| 175 g | 15.7 | 12.4 |
| 200 g | 18.0 | 14.2 |
Easy ways to keep the carb total steady
The sprouts themselves stay low in carbs. The add-ons can change the total quickly. A sweet glaze or sticky sauce can add more carbs than the sprouts in a few spoonfuls.
If you want a simple default, keep it savory. Olive oil, butter, garlic, lemon, vinegar, herbs, salt, pepper, chili flakes, and hard cheese add big flavor with little or no carbohydrate.
If you like a sweet note, measure it. A drizzle that looks small can still be a full tablespoon once it hits a hot pan.
Meal math that feels doable
Once you know your usual serving, logging gets simple. Pick one baseline portion and reuse it, then adjust when your meal changes.
- Weeknight side: 1/2 cup boiled and drained sits around 5.5 g total carbs.
- Roasted tray: weigh your sprouts portion when you add sweet veg or a sticky sauce.
- Salad bowl: two cups raw sit around 15.8 g total carbs and about 6.6 g fiber before toppings.
Carbohydrates checklist before you serve
- Decide whether you track total carbs only or total carbs and fiber.
- Match the database entry to your prep style, then stay consistent.
- Use cups for speed, use grams when you want tighter numbers.
- Drain boiled sprouts well if you’re comparing to “drained” values.
- Count sauces, glazes, and sweet add-ins as part of the carb total.
References & Sources
- U.S. Department of Agriculture (USDA), FoodData Central.“Brussels sprouts, raw (nutrients).”Used for raw Brussels sprouts total carbs, fiber, sugars, and cup weights.
- U.S. Department of Agriculture (USDA), FoodData Central.“Brussels sprouts, cooked, boiled, drained, without salt (nutrients).”Used for cooked boiled and drained Brussels sprouts total carbs, fiber, and cup weights.
- U.S. Department of Agriculture (USDA), FoodData Central.“Brussels sprouts, frozen, cooked, boiled, drained, without salt (nutrients).”Used for frozen cooked Brussels sprouts total carbs, fiber, and cup weights.
- U.S. Food and Drug Administration (FDA).“Interactive Nutrition Facts Label: Total Carbohydrate.”Defines the “total carbohydrate” line and how fiber and sugars fit under it.
