Calories in Mushrooms
Per 1 cup sliced, 70 g
Mushrooms have 15 calories per 1 cup sliced, 70 g. That is about 1% of a 2,000-calorie day. The same serving provides 2.2 g of protein, 2.3 g of carbohydrate, 0.2 g of fat and 0.7 g of fibre. Per 100 g, that works out at 21 calories and 3.1 g of protein. Against the thresholds EU food labelling uses, they qualify as high in protein, fat free and low energy. Bulk out a mince dish with chopped mushrooms and the portion grows while the calories do not.
Calories and macros
| Per 1 cup sliced, 70 g | Serving | Per 100 g | % of daily intake |
|---|---|---|---|
| Calories | 15 kcal | 21 kcal | 1% |
| Protein | 2.2 g | 3.1 g | 4% |
| Carbohydrate | 2.3 g | 3.3 g | 1% |
| Fat | 0.2 g | 0.3 g | 0% |
| Fibre | 0.7 g | 1.0 g | 2% |
Daily intake percentages use the EU reference intakes an average adult label is based on: 2,000 kcal, 50 g protein, 260 g carbohydrate, 70 g fat, 30 g fibre.
What this is good for
These are the nutrition claims this food would qualify for under EU labelling rules — thresholds, not opinions.
Worth knowing
Figures are for a typical example and will vary by brand, ripeness and how it was cooked. For a target of your own, run the calorie calculator or take the short quiz. To log this without doing the arithmetic, Joules is free.
Figures last reviewed 29 August 2026.
Common questions about mushrooms
How many calories are in mushrooms?
Mushrooms have 15 calories per 1 cup sliced, 70 g, which is about 1% of a 2,000-calorie day.
How many calories are in 100 g of mushrooms?
100 g of mushrooms contains 21 calories.
How much protein is in mushrooms?
One serving of 1 cup sliced, 70 g provides 2.2 g of protein — 3.1 g per 100 g, or 4% of the 50 g daily reference intake.
How many carbs are in mushrooms?
One serving of 1 cup sliced, 70 g contains 2.3 g of carbohydrate, of which 0.7 g is fibre.
What are mushrooms a good source of?
Measured against EU food labelling thresholds, mushrooms qualify as high in protein, fat free and low energy. At least 20% of its calories come from protein. Under 0.5 g of fat per 100 g. Under 40 calories per 100 g — a lot of food for very little.