King oyster Mushroom Calories and Nutrition Facts
King oyster Mushroom has 46 calories per 100 g, with 2.4 g protein, 8.5 g carbs and 0.3 g fat. Official USDA analytical record: Mushroom, king oyster (FDC ID: 2003599).
A 100g serving of king oyster mushroom contains 46 calories, 2.4g protein, 8.5g total carbs (5.5g net carbs), and 0.3g fat.
Energy density
0.46 kcal/g
very low
Protein / 100 kcal
5.2 g
satiety per calorie
Net carbs / 100 g
5.5 g
carbs minus fibre
100 kcal portion
217 g
≈ 7.7 oz
- Sugars
- 0g
- Fibre
- 3g
- Saturated fat
- 0g
- Sodium
- 1mg
Mushroom, king oyster nutrition facts
The table below shows the complete nutritional profile for mushroom, king oyster per 100 g (the laboratory analytical standard), alongside the share of the FDA Daily Value each nutrient covers. Most of its calories come from carbohydrate, and it is a source of fibre, relatively low in calories.
| Nutrient | Per 100 g | % DV* |
|---|---|---|
| Calories | 46 kcal | — |
| Protein | 2.4 g | 5% |
| Carbohydrate | 8.5 g | 3% |
| Fat | 0.3 g | 0% |
| Sugars | 0 g | — |
| Fibre | 3 g | 11% |
| Saturated fat | 0 g | 0% |
| Sodium | 1 mg | 0% |
*Percent Daily Value per 100 g, against the FDA reference intakes for adults and children 4+ years (50 g protein, 275 g carbohydrate, 28 g fibre, 78 g fat, 20 g saturated fat, 2300 mg sodium). Total sugars has no Daily Value — the 50 g reference applies to added sugars only, and USDA reports total sugars here.
King oyster Mushroom calories by weight: ounces, pounds and grams
USDA publishes this food per 100 g, so here is the same profile converted to the weights a kitchen scale and a US recipe actually use. At 0.46 kcal per gram (very low energy density), you can eat a large volume of this for very few calories, which makes it useful for filling out a meal in a deficit.
| Amount | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|
| 1 oz (28 g) | 13 kcal | 0.7 g | 2.4 g | 0.1 g |
| 100 g (3.5 oz) | 46 kcal | 2.4 g | 8.5 g | 0.3 g |
| 4 oz (113 g) | 52 kcal | 2.7 g | 9.6 g | 0.3 g |
| 8 oz / ½ lb (227 g) | 104 kcal | 5.4 g | 19.3 g | 0.7 g |
| 1 lb (454 g) | 209 kcal | 10.9 g | 38.6 g | 1.4 g |
Data sourced from USDA FoodData Central Foundation Foods dataset (public domain, CC0). Laboratory food profile and analytical measurements verified under USDA FDC ID 2003599.
View raw USDA laboratory entry →How king oyster mushroom compares to other vegetables
Against the 80 vegetables in this database, king oyster mushroom ranks 62nd lowest in calories and 21st highest in protein. The category averages 50 kcal per 100 g, so this one is 8% below it. The lightest option in the category is pickles, cucumber, dill or kosher dill at 12 kcal per 100 g, and the protein leader is flour, potato at 8.1 g per 100 g.
| Vegetables (by calories) | Calories | Protein | kcal/g |
|---|---|---|---|
| 🧅 Onions, red, raw | 44 kcal | 0.9 g | 0.44 |
| 🍽️ Beets, raw | 45 kcal | 1.7 g | 0.45 |
| 🍄 Mushroom, king oyster (this page) | 46 kcal | 2.4 g | 0.46 |
| 🍽️ Collards, raw | 47 kcal | 3 g | 0.47 |
| 🥕 Carrots, mature, raw | 48 kcal | 0.9 g | 0.48 |
Portion planning with king oyster mushroom
- 100 calories comes to about 217 g (7.7 oz).
- 20 g of protein takes about 833 g, bringing 383 kcal with it — that is 5.2 g of protein per 100 calories.
- Fibre density is 6.5 g per 100 calories, covering 11% of the daily fibre target per 100 g.
- Macro split by calories: 73% carbs, 21% protein, 6% fat.
Nutrient screening detail
The badges near the top of this page come from screening the per-100 g values against the FDA nutrient-content thresholds in 21 CFR 101.54–101.62. The regulations define those claims per reference serving rather than per 100 g, so treat these as a like-for-like comparison between foods, not as a statement about a product label:
- Good source of fibre — 3 g per 100 g (≥ 10% DV)
- Low fat — 0.3 g per 100 g (≤ 3 g)
- Low saturated fat — 0 g per 100 g (≤ 1 g)
- Sodium free — 1 mg per 100 g (< 5 mg)
- Sugar free — 0 g total sugars per 100 g (< 0.5 g)
Track king oyster mushroom for free
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King oyster Mushroom FAQ & Nutrition Questions
How many calories and carbs are in 100 g of king oyster mushroom?
One serving of 100 g provides 46 calories, 8.5 g total carbs (5.5 g net carbs), 2.4 g protein, and 0.3 g fat.
How many calories are in 100 g of king oyster mushroom?
King oyster Mushroom contains 46 calories per 100 g, with 2.4 g protein, 8.5 g carbohydrate, and 0.3 g fat. Use the interactive calculator above to scale to any custom amount.
What is the USDA FoodData Central (FDC) ID for king oyster mushroom?
The official USDA FoodData Central ID for "Mushroom, king oyster" is FDC ID: 2003599. You can view the verified laboratory analytical record on the USDA FoodData Central Database.
What is the macronutrient breakdown of king oyster mushroom?
By calories, king oyster mushroom is approximately 73% carbohydrates, 21% protein, and 6% fat.
How many calories are in an ounce of king oyster mushroom?
One ounce (28 g) of king oyster mushroom has 13 calories, with 0.7 g protein, 2.4 g carbs and 0.1 g fat. Four ounces (113 g) comes to 52 calories, and a full pound (454 g) to 209 calories.
How much king oyster mushroom is 100 calories?
About 217 g of king oyster mushroom supplies 100 calories, because it carries 0.46 kcal per gram (very low energy density). You can eat a large volume of this for very few calories, which makes it useful for filling out a meal in a deficit.
How much king oyster mushroom do I need for 20 g of protein?
Roughly 833 g of king oyster mushroom, which also brings 383 calories with it. That works out to 5.2 g of protein per 100 calories.
How many net carbs are in king oyster mushroom?
Per 100 g, king oyster mushroom has 5.5 g net carbs — 8.5 g total carbohydrate minus 3 g fibre.
Is king oyster mushroom high or low in calories for a vegetable?
King oyster Mushroom sits 8% below the vegetables average of 50 kcal per 100 g, ranking 62nd lowest of 80 in this category.
Is this nutrition data free to use?
Yes. The data is sourced directly from USDA FoodData Central (CC0 public domain). Viewing and scaling portions here is 100% free with no sign-up — and you can log this food free in our online food diary.