Carbs in Mushroom
Keto-friendlyHow many carbs are in mushroom?
Mushroom has 2g net carbs per 100g — 3g total carbs minus 1g fiber — plus 3g protein, 0g fat, and 21 calories. 1 cup sliced (70g) works out to about 1.4g net carbs and 15 calories. That makes mushroom very low in net carbs and lower than the typical vegetable, which averages about 17.9g net carbs per 100g. With this carb count, mushroom fits a keto or low-carb diet (usually 20–50g net carbs per day) in normal portions. Values are per per 100 g, sourced from Open Food Facts; net carbs are computed by CarbMeNot.
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Last updated June 10, 2026 · Reviewed by Jordan Lee, Nutrition Editor
Values per 100 g.
Is mushroom keto-friendly?
Yes — mushroom is keto-friendly. It has 2g net carbs per 100g (3g total carbs − 1g fiber). A typical serving — 1 cup sliced (70g) — is about 1.4g net carbs. On a standard keto diet (20–50g net carbs per day), that leaves plenty of room for other vegetables and meals.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 1 cup sliced | 1.4g | 2.1g | 2.1g | 15 |
| 100 g (3.5 oz) | 2g | 3g | 3g | 21 |
| 1 oz (28 g) | 0.6g | 0.8g | 0.8g | 6 |
How many calories are in mushroom?
Mushroom has 21 calories per 100g. 1 cup sliced (70g) has about 15 calories. That's alongside 3g protein, 0g fat, and 2g net carbs per 100g.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 21 |
| Total carbs | 3g |
| Net carbs | 2g |
| Fiber | 1g |
| Sugar | 0g |
| Sugar alcohols | 0g |
| Protein | 3g |
| Fat | 0g |
| Sodium | 0mg |
| Potassium | 0mg |
Source: Open Food Facts (MG Alimentos). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in mushroom?
- Mushroom has 3g of total carbs and 2g of net carbs per 100 grams.
- How many net carbs are in mushroom?
- Mushroom has 2g of net carbs per 100 grams (total carbs 3g minus 1g fiber).
- Is mushroom keto-friendly?
- Yes — mushroom is keto-friendly. It has 2g net carbs per 100g (3g total carbs − 1g fiber). A typical serving — 1 cup sliced (70g) — is about 1.4g net carbs. On a standard keto diet (20–50g net carbs per day), that leaves plenty of room for other vegetables and meals.
- How many calories are in mushroom?
- Mushroom has 21 calories per 100 grams.
- How many carbs are in 1 cup sliced of mushroom?
- 1 cup sliced of mushroom (70g) has about 1.4g net carbs, 2.1g total carbs, and 15 calories.
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CarbMeNot provides general nutrition information, not medical advice. Values are estimates — verify before relying on them for any health decision. See our Medical Disclaimer.