Oysters: Nutrition Facts
Oysters are an edible marine mollusk eaten raw or cooked. The USDA SR Legacy entry below describes the raw, wild eastern form, with roughly 5.7 g of protein and 1.7 g of fat per 100 g.
| Energy (kcal) | Protein (g) | Carb (g) | Fiber (g) | Fat (g) |
|---|---|---|---|---|
| 51 | 5.7 | 2.7 | 0.0 | 1.7 |
Diet patterns
How these tags are decided
Foods are tagged high protein when at least 20% of their energy comes from protein, the threshold set by the European Union for a high-protein claim (Regulation (EC) No 1924/2006). Foods are tagged keto-friendly or low carb when they contain at most 5 g or 10 g of total carbohydrate per 100 g. Ketogenic and low-carbohydrate eating patterns limit total daily carbohydrate (commonly 20 to 50 g per day for ketogenic diets, and under about 130 g per day for low-carb diets), so foods low in carbohydrate per 100 g fit within that budget. These per-100-gram cut-offs are Vitals Hub's own thresholds, chosen to reflect those daily budgets; they are not a regulatory or clinical standard. All values are USDA-sourced totals per 100 g.
Percent Daily Value by serving
| Serving | Energy (kcal) | Protein (g) | Carb (g) | Fiber (g) | Fat (g) |
|---|---|---|---|---|---|
| 100 g | 51 (3%) | 5.7 (11%) | 2.7 (1%) | 0.0 (0%) | 1.7 (2%) |
| 1 cup (~248 g) | 126 (6%) | 14.2 (28%) | 6.7 (2%) | 0.0 (0%) | 4.2 (5%) |
| 6 medium (~84 g) | 43 (2%) | 4.8 (10%) | 2.3 (1%) | 0.0 (0%) | 1.4 (2%) |
Percent Daily Value shows how much a nutrient in one serving contributes to a daily diet, based on the United States Food and Drug Administration reference intake of 2,000 calories a day. The FDA notes that 2,000 calories a day is used for general nutrition advice and that individual needs vary. The values below are calculated from the USDA macros for this food. FDA Daily Value on the Nutrition and Supplement Facts Labels (21 CFR 101.9), accessed 2026-06-05.
| Serving | Amount | % Daily Value |
|---|---|---|
| Energy (kcal) | 51 | 3% |
| Protein (g) | 5.7 | 11% |
| Carb (g) | 2.7 | 1% |
| Fiber (g) | 0.0 | 0% |
| Fat (g) | 1.7 | 2% |
How much protein in Oysters?
Oysters, raw, wild, eastern, contains 5.7 g of protein per 100 g, per the USDA FoodData Central entry cited below. A typical 1 cup (~248 g) serving therefore provides about 14.2 g of protein.
How many calories in Oysters?
Oysters, raw, wild, eastern, supplies about 51 kcal per 100 g. A 1 cup (~248 g) serving works out to roughly 126 kcal.
Common serving sizes
- 1 cup (~248 g): 126 kcal, 14.2 g protein, 4.2 g fat
- 6 medium (~84 g): 43 kcal, 4.8 g protein, 1.4 g fat
Related guides
Source: USDA FoodData Central, fdcId 171978, accessed 2026-05-29
References
- Mollusks, oyster, eastern, wild, raw - USDA FoodData Central. USDA FoodData Central. Accessed 2026-05-29.
Last reviewed: 2026-05-29