A 3-ounce serving of boiled crawfish tail meat contains roughly 65 calories. That makes crawfish one of the lowest-calorie protein sources you can eat, comparable to shrimp (72 calories) and lobster (64 calories) for the same portion size. The catch is that crawfish are small, so understanding how much meat you actually get from a pile of whole crawfish matters just as much as the per-serving numbers.
Calories by Serving Size
According to Louisiana Department of Health data, about 5/8 cup (89 grams) of crawfish tail meat provides 75 calories, 16 grams of protein, and just 1 gram of total fat. That protein-to-calorie ratio is exceptional. You get more protein per calorie from crawfish than from chicken breast in many preparations.
The tricky part is translating a pile of whole boiled crawfish into actual meat. Crawfish have a 15 to 20 percent meat yield, meaning 6 to 7 pounds of live crawfish produce just one pound of edible tail meat. So if you sit down to a traditional 3-pound serving of whole boiled crawfish, you’re eating roughly half a pound of tail meat at most, which works out to around 150 to 170 calories from the crawfish alone.
How Cooking Method Changes the Count
Boiled crawfish stay remarkably lean because the cooking method adds no oil. A traditional Cajun boil uses water, salt, and seasoning, which contribute negligible calories to the meat itself. The sodium content goes up significantly, but the calorie count stays close to the raw baseline.
Fried crawfish tails are a different story. Battering and deep-frying adds both carbohydrates from the breading and fat from the oil. A fried crawfish tail platter can easily double or triple the calorie count compared to the same amount of boiled tail meat. Crawfish prepared in rich butter sauces, étouffée, or bisque also climb quickly depending on the recipe’s fat base.
What a Full Crawfish Boil Really Costs
If you’re eating at a crawfish boil, the sides often contribute more calories than the crawfish themselves. A single ear of corn adds about 80 calories, one small red potato adds around 130, and a single sausage link adds roughly 200. A typical plate with a few pounds of crawfish, two potatoes, an ear of corn, and a sausage link can land somewhere between 500 and 700 calories total, with the crawfish being the lightest component on the tray.
How Crawfish Compare to Other Shellfish
Crawfish hold up well against virtually every other shellfish option. For a 3-ounce cooked serving:
- Scallops: 59 calories
- Lobster: 64 calories
- Crawfish: 65 calories
- Oysters: 69 calories
- Shrimp: 72 calories
- Mussels: 73 calories
- Crab: 74 calories
The differences are small enough that choosing between these shellfish based on calories alone doesn’t make much practical sense. All of them are high-protein, low-calorie options.
Nutritional Benefits Beyond Calories
Crawfish pack a surprising amount of nutrition into those 65 calories. A 100-gram serving of boiled crawfish delivers 5.6 micrograms of vitamin B12, which is more than double the daily requirement for most adults. B12 supports nerve function and red blood cell production, and it’s a nutrient many people fall short on.
The same serving provides 185 milligrams of phosphorus (about 15 to 25 percent of daily needs depending on age) and 26 micrograms of selenium, which covers close to half the daily recommendation. Selenium plays a role in thyroid function and acts as an antioxidant in the body.
Cholesterol in Crawfish
One area where crawfish stand out from other lean proteins is cholesterol. A 3-ounce serving contains about 178 milligrams, which is higher than most shellfish. That said, it still falls within the 300-milligram daily limit that major health organizations have traditionally recommended. A 3.5-ounce serving provides roughly half of that daily allotment.
For most people, dietary cholesterol has a smaller effect on blood cholesterol than previously believed, and the overall fat profile of crawfish is favorable: very low in total fat with minimal saturated fat. If your doctor has specifically told you to limit dietary cholesterol, this is worth keeping in mind. Otherwise, crawfish remain a heart-healthy protein choice given their low fat and high nutrient density.