How many carbs are in mushrooms?
One cup of raw sliced white mushrooms has about 2.3g of carbohydrate and 1.6g of net carbs. Mushrooms are among the lowest vegetables for carbs.
Carbs by portion
| Portion | Total carbs | Fiber | Net carbs |
|---|---|---|---|
| 1 cup sliced (70g) | 2.3g | 0.7g | 1.6g |
| 1 small (10g) | 0.3g | 0.1g | 0.2g |
| 1 medium (18g) | 0.6g | 0.2g | 0.4g |
| 1 large (23g) | 0.7g | 0.2g | 0.5g |
| 100 grams | 3.3g | 1.0g | 2.3g |
Net carbs
A cup of raw sliced mushrooms has about 1.6g of net carbs, which is total carbs (2.3g) minus fiber (0.7g). See the net carbs guide.
For diabetes
Mushrooms have almost no effect on blood sugar. A cup of raw slices is about 2g of carbohydrate, low enough to add to most meals without a meaningful dose. Watch the cooking fat and the cream sauces rather than the mushrooms themselves. See the diabetes carb-counting guide.
Keto and low carb
Yes. At about 1.6g net carbs per cup, mushrooms fit any keto plan. Sautéing them in butter or oil adds fat, not carbs.
Good to know
White button, cremini, and portobello mushrooms all land in the same low range. The carbs only climb when mushrooms arrive breaded, battered, or in a flour-thickened cream sauce. Cooking shrinks them, so a cooked cup holds more mushrooms than a raw cup.
Full nutrition (per 100g)
- Calories: 22.0 kcal
- Carbohydrate: 3.26g
- Fiber: 1.0g
- Sugars: 1.98g
- Protein: 3.09g
- Fat: 0.34g
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Get the appFrequently asked questions
How many carbs are in mushrooms?
One cup of raw sliced white mushrooms has about 2.3g of carbohydrate.
How many net carbs are in mushrooms?
A cup of raw sliced mushrooms has about 1.6g of net carbs, total carbs (2.3g) minus fiber (0.7g).
Are mushrooms OK for diabetics?
Yes. Mushrooms are very low in carbohydrate and have little effect on blood sugar. The add-ons, like breading or cream sauce, matter more.
Are mushrooms keto?
Yes. At roughly 1.6g net carbs per cup, mushrooms are a keto staple.
Do different mushrooms have different carbs?
Common types like button, cremini, and portobello are all similarly low in carbohydrate. Preparation changes the number more than the variety does.