Calories in
mushrooms, oyster, raw
33 kcal per 100 g Mushrooms, oyster, raw contains 33 calories per 100 grams, or about 49 calories per large. Per 100 g it provides 3.3 g protein, 6.1 g carbohydrate and 0.4 g fat.
By calories that splits 59% carbohydrate, 32% protein, 9% fat.
Calories in a typical serving
Per-100 g figures are useful for comparison but nobody eats 100 g of anything on purpose. These are the USDA's own household measures.
| Serving | Grams | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|---|
| 1 large | 148.0 g | 49 | 4.9 g | 9.0 g | 0.6 g |
| 1 small | 15.0 g | 5 | 0.5 g | 0.9 g | 0.1 g |
| 1 cup sliced | 86.0 g | 28 | 2.8 g | 5.2 g | 0.4 g |
Full nutrition, per 100 g and per large
| Nutrient | Per 100 g | Per large |
|---|---|---|
| Energy | 33 kcal | 49 kcal |
| Protein | 3.3 g | 4.9 g |
| Total fat | 0.4 g | 0.6 g |
| Saturated fat | 0.1 g | 0.1 g |
| Carbohydrate | 6.1 g | 9.0 g |
| Fibre | 2.3 g | 3.4 g |
| Sugars | 1.1 g | 1.6 g |
| Sodium | 18.0 mg | 26.6 mg |
| Potassium | 420.0 mg | 621.6 mg |
| Calcium | 3.0 mg | 4.4 mg |
| Iron | 1.3 mg | 2.0 mg |
| Vitamin C | 0.0 mg | 0.0 mg |
| Vitamin A | 2.0 µg | 3.0 µg |
| Cholesterol | 0.0 mg | 0.0 mg |
| Water | 89.2 g | 132.0 g |
USDA FoodData Central, SR Legacy (FDC ID 168580). A dash means the nutrient was not measured for this item, which is not the same as zero.
How mushrooms, oyster, raw compares
Among the 209 vegetables and vegetable products items on this site, mushrooms, oyster, raw ranks 103 of 209 by calorie density, against a category average of 62 kcal per 100 g — so it is about 47% less calorie-dense than typical for its group.
It carries 10 g of protein per 100 calories, a moderate protein contribution.
To burn off one large (49 kcal), a 70 kg adult would walk for roughly 10 minutes — see the walking calculation on our sister site, or pick a different activity. Treat that as a sense of scale rather than a rule: eating and moving are not a simple ledger.
Questions
How many calories are in mushrooms, oyster, raw?
Mushrooms, oyster, raw contains 33 calories per 100 g, which works out to about 49 calories per large. It also provides 3.3 g of protein, 6.1 g of carbohydrate and 0.4 g of fat per 100 g.
What is the macro breakdown of mushrooms, oyster, raw?
By calories, mushrooms, oyster, raw is roughly 59% carbohydrate, 32% protein and 9% fat. That makes it a predominantly carbohydrate-based food.
How long does it take to burn off a large?
About 10 minutes of ordinary walking for a 70 kg adult (MET 4.0). That is a rough guide for scale, not a prescription — appetite and activity interact in ways a simple subtraction does not capture.
Is this figure exact for the mushrooms, oyster, raw I bought?
No. These are USDA reference values, averaged across samples. Real foods vary with variety, ripeness, growing conditions, cut, brand and how they were cooked — 10–20% either way is normal. Use them for planning, not precision.
Similar foods
Closest in calorie density within vegetables and vegetable products.
Source: USDA FoodData Central, SR Legacy — public domain. Full USDA description: "Mushrooms, oyster, raw". General information only — not medical or nutrition advice. Values are averages for a food type and vary by brand, ripeness and preparation.