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Calories in Mushrooms
100 g of mushrooms has 22 kcal, and 1 slice of mushrooms (6 g) has about 1 kcal.
22 kcalper 100 g
1 kcal in 1 piece/slice (6 g)
Very low density · 0.22 kcal per g
- Protein 3.1g 43% of the calories
- Carbs 3.3g 46% of the calories
- Fat 0.3g 11% of the calories
- Fiber 1g
Per 100 g. Figures from USDA FoodData Central. Averages across measured samples; a few percent either way is normal. Updated 2026-10-04.
100 g is about 5 minutes of walking, or 2 minutes of running, for a 70 kg body - context, not a debt to work off.
Mushrooms nutrition facts
A dash means nobody measured it - not that there is none of it.
| Nutrient | Per 100 g | Per serving |
|---|---|---|
| Energy | 22kcal | 1kcal |
| Fat | 0.34g | 0.02g |
| Saturated Fat | 0.05g | 0.003g |
| Unsaturated Fat | 0.3g | 0.018g |
| Carbs | 3.3g | 0.2g |
| Sugars | 2g | 0.12g |
| Fiber | 1g | 0.06g |
| Protein | 3.1g | 0.19g |
| Salt | 0.013g | 0.001g |
| Water | 91.8g | 5.5g |
| Alcohol | 0g | 0g |
|---|---|---|
| Caffeine | 0mg | 0mg |
| Monounsaturated | 0g | 0g |
|---|---|---|
| Polyunsaturated | 0.16g | 0.01g |
| Omega-3 | 0g | 0g |
| ALA | 0g | 0g |
| DHA | 0g | 0g |
| EPA | 0g | 0g |
| Omega-6 | 0.16g | 0.01g |
| AA | 0g | 0g |
| LA | 0.16g | 0.01g |
| Cholesterol | 0mg | 0mg |
| Vitamin B1 (Thiamine) | 0.053mg | 0.003mg |
|---|---|---|
| Vitamin B2 (Riboflavin) | 0.45mg | 0.027mg |
| Vitamin B3 (Niacin) | 3.9mg | 0.23mg |
| Vitamin B6 (Pyridoxine) | 0.082mg | 0.005mg |
| Vitamin B12 (Cobalamin) | 0.04µg | 0.002µg |
| Folate (Vitamin B9) | 35µg | 2.1µg |
| Vitamin A | 0µg | 0µg |
| Vitamin C | 2.1mg | 0.13mg |
| Vitamin D | 0IU | 0IU |
| Vitamin E | 0.01mg | 0.001mg |
| Vitamin K | 0µg | 0µg |
| Choline | 17.3mg | 1mg |
| Calcium | 5mg | 0.3mg |
|---|---|---|
| Copper | 0.36mg | 0.022mg |
| Iron | 0.23mg | 0.014mg |
| Magnesium | 10mg | 0.6mg |
| Phosphorus | 93mg | 5.6mg |
| Potassium | 371mg | 22.3mg |
| Selenium | 19µg | 1.1µg |
| Zinc | 0.5mg | 0.03mg |
| Beta-carotene | 0µg | 0µg |
|---|---|---|
| Lycopene | 0µg | 0µg |
| Lutein + zeaxanthin | 0µg | 0µg |
| Cystine | 0.012g | 0.001g |
|---|---|---|
| Histidine | 0.06g | 0.004g |
| Isoleucine | 0.081g | 0.005g |
| Leucine | 0.13g | 0.008g |
| Lysine | 0.12g | 0.007g |
| Methionine | 0.034g | 0.002g |
| Phenylalanine | 0.089g | 0.005g |
| Threonine | 0.11g | 0.007g |
| Tryptophan | 0.039g | 0.002g |
| Tyrosine | 0.048g | 0.003g |
| Valine | 0.24g | 0.014g |
Foods with similar calories
Other published foods within reach of 22 kcal per 100 g, so the number has something to sit against.
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Questions about mushrooms
1 slice of mushrooms (6 g) has about 1 kcal, and 100 g has 22 kcal.
100 g of mushrooms has 2 g of sugar.
It depends on how it is prepared. Per 100 g: raw 22 kcal, cooked, canned 47 kcal, cooked, no added fat 39 kcal, cooked, fat added 66 kcal. This page shows mushrooms (raw).
Yes. 100 g of mushrooms has only 2.3 g of net carbs (carbs minus fiber), little enough for most low-carb and keto diets.
Yes. 100 g of mushrooms has only 22 kcal.
100 g of mushrooms covers this much of an adult's daily need: copper 36%, selenium 35%, vitamin B2 32%, vitamin B3 24%.
It can be part of a diet that loses weight: what counts is the total calories you eat in a day, not any single food. 100 g of mushrooms has 22 kcal. The calorie calculator works out how many you need.
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