Calories in Oysters
59 calories per 100g (100g)
Eastern farmed raw oysters contain just 59 calories per 100 grams, making them one of the leanest protein sources in the shellfish family. A typical serving of 6 medium oysters (around 84g) provides roughly 50 calories, with a solid balance of protein and carbohydrates. Whether you're eating them on the half shell or adding them to a recipe, raw oysters are a naturally low-calorie, nutrient-dense choice.
Calories by Portion Size
| Portion | Weight | Calories |
|---|---|---|
| 1 medium oyster (approx.) | 14g | 8 |
| 3 medium oysters | 42g | 25 |
| 6 medium oysters (half dozen) | 84g | 50 |
| 100g (USDA standard serving) | 100g | 59 |
| 12 medium oysters (dozen) | 168g | 99 |
| 1 cup (approx. 248g) | 248g | 146 |
Protein
5.22g
35% of calories
Carbs
5.53g
37% of calories
Fat
1.55g
24% of calories
How does this compare?
Eastern farmed raw oysters at 59 calories per 100g are among the lowest-calorie shellfish options — comparable to clams (~74 kcal/100g) but lighter than mussels (~86 kcal/100g). Their modest fat content of just 1.55g per 100g also makes them leaner than most finfish in the same USDA category.
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- 1.
Eat them on the half shell with just lemon juice or a light mignonette to keep calories minimal — heavy cream sauces or butter can multiply the calorie count several times over.
- 2.
A half dozen raw oysters makes a satisfying, protein-rich appetizer for around 50 calories, helping curb hunger before a main meal without a large calorie investment.
- 3.
If you're tracking portions, note that oyster sizes vary — farmed eastern oysters tend to be smaller and more consistent than wild-caught varieties, so weigh them for accuracy.
- 4.
Avoid deep-fried oyster preparations if you're watching calories; frying can push a 50-calorie serving of raw oysters well past 150–200 calories.
- 5.
Pair raw oysters with a side of vegetables or a light broth-based soup to build a filling, low-calorie meal without relying on high-calorie accompaniments.
Common Questions About Calories in Oysters
How many calories are in 6 raw oysters?
Six medium eastern farmed raw oysters weigh approximately 84g and contain around 50 calories, based on USDA data of 59 calories per 100g.
Are raw oysters good for weight loss?
Raw oysters are very low in calories (59 kcal/100g) and provide over 5g of protein per 100g, which makes them a filling, nutrient-dense option that fits well into a calorie-conscious eating plan.
How many calories are in a dozen raw oysters?
A dozen medium eastern farmed raw oysters weighs roughly 168g and contains approximately 99 calories, making them an impressively light food even in larger portions.
Do raw oysters have a lot of carbs or fat?
No — eastern farmed raw oysters contain just 5.53g of carbohydrates and 1.55g of fat per 100g, with zero added sugar or fiber, according to USDA data.