Mushroom Calories & Carbs
Keto-friendlyLast updated September 8, 2026 · Compiled by the CarbMeNot Team
Values per 1 cup sliced (70g); per 100 g: 2g net carbs, 21 cal. Net carbs = total carbs − fiber − sugar alcohols — do the math for any label with the free net carbs calculator.
How many carbs are in mushroom?
Mushroom — 1 cup sliced (70g) — has 1.4g net carbs: 2.1g total carbs minus 0.7g fiber, plus 2.1g protein, 0g fat, and 15 calories. Per 100g that is 2g net carbs (3g total carbs, 1g fiber) and 21 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 100 g, sourced from Open Food Facts; net carbs are computed by CarbMeNot.
Is mushroom keto-friendly?
Yes — mushroom is keto-friendly. 1 cup sliced (70g) is 1.4g net carbs (2.1g total carbs − 0.7g fiber); per 100g that is 2g net carbs. On a standard keto diet (20–50g net carbs per day), that leaves plenty of room for other vegetables and meals.
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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 — 1 cup sliced (70g) — has 15 calories, with 2.1g protein, 0g fat, and 1.4g net carbs. Per 100g: 21 calories and 2g net carbs.
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 (1 cup sliced, 70g) has 2.1g of total carbs and 1.4g of net carbs. Per 100 grams: 3g total, 2g net.
- How many net carbs are in mushroom?
- Mushroom has 1.4g of net carbs per 1 cup sliced (70g) — 2.1g total carbs minus 0.7g fiber.
- Is mushroom keto-friendly?
- Yes — mushroom is keto-friendly. 1 cup sliced (70g) is 1.4g net carbs (2.1g total carbs − 0.7g fiber); per 100g that is 2g 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 (1 cup sliced, 70g) has 15 calories; that is 21 calories per 100 grams.
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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.