Crabs are a lean, protein-rich seafood enjoyed worldwide, but their calorie content varies significantly depending on the species, cooking method, and whether you eat the meat plain or with butter. Our Crab Calories Per Serving Calculator helps you estimate the calories in your crab serving quickly and accurately, whether you're tracking macros, planning a seafood dinner, or just curious about your meal.
Simply enter the amount of crab meat you're eating, choose the type (blue crab, Dungeness, king crab, or snow crab), select your cooking method (steamed, boiled, or sautéed in butter), and optionally add a pat of butter or a dipping sauce. The calculator instantly provides total calories, protein, fat, and carbohydrates, plus a per-100g breakdown so you can compare across serving sizes. Perfect for home cooks, dietitians, and fitness enthusiasts who want precise nutrition data without guesswork.
🦀 Crab Calories Per Serving
How to Use This Tool
Enter the amount of crab meat you plan to eat, choose the unit (grams, ounces, or cups of flaked meat), select the crab type, cooking method, and any added butter or sauce. Click Calculate to see total calories, protein, fat, and carbohydrates for your serving, plus a per-100g reference. Use the Reset button to clear all fields and start over.
For the most accurate results, weigh your crab meat after cooking and removing shells. If you're eating crab legs, remember that the edible meat is only a fraction of the total weight — a typical king crab leg yields about 60–70% meat by weight.
Nutritional Breakdown by Crab Type
Different crab species have slightly different macronutrient profiles. The values below are for cooked, plain crab meat (steamed or boiled) per 100 grams:
| Crab Type | Calories | Protein (g) | Fat (g) | Carbs (g) |
|---|---|---|---|---|
| Blue crab | 87 | 18.1 | 1.2 | 0 |
| Dungeness crab | 86 | 17.4 | 1.2 | 0 |
| King crab | 97 | 19.4 | 1.5 | 0 |
| Snow crab | 90 | 18.3 | 1.2 | 0 |
These values are based on USDA FoodData Central entries for cooked crab. Note that added butter or sauces can significantly increase the calorie and fat content — a single tablespoon of butter adds about 102 kcal and 11.5 g of fat.
Worked Examples
Example 1: You eat 150 g of steamed blue crab meat with no added butter. Using the calculator: 150 g × 0.87 kcal/g = 130.5 kcal, protein = 150 × 0.181 = 27.2 g, fat = 150 × 0.012 = 1.8 g. Total: ~131 kcal, 27 g protein, 2 g fat.
Example 2: You have 200 g of king crab legs (meat only) sautéed in butter, plus 1 tbsp of garlic butter. Base king crab: 200 g × 0.97 = 194 kcal, protein = 200 × 0.194 = 38.8 g, fat = 200 × 0.015 = 3 g. Sautéing adds ~50 kcal per 100g, so +100 kcal and +11 g fat. Garlic butter adds 120 kcal and 13 g fat. Total: 194 + 100 + 120 = 414 kcal, 38.8 g protein, 3 + 11 + 13 = 27 g fat.
Factors Affecting Accuracy
The calorie values are averages and can vary based on the crab's diet, season, and preparation. Cooking methods that add oil or butter will increase calories, while steaming or boiling without added fat keeps the count low. If you're tracking macros precisely, always weigh your food after cooking and account for any sauces or dips.
Also note that crab meat is naturally very low in carbohydrates, making it a great choice for low-carb and ketogenic diets. However, imitation crab (surimi) is much higher in carbs and lower in protein — avoid it if you're counting carbs.
Frequently Asked Questions
Q: How many calories are in a whole crab? A: A whole blue crab (about 150 g total weight) yields roughly 60–80 g of meat, so about 52–70 kcal. A whole Dungeness crab (about 1 kg) yields about 300–400 g of meat, so 260–350 kcal.
Q: Is crab good for weight loss? A: Yes, crab is high in protein and low in fat and calories, which helps with satiety. Just be mindful of butter and sauces.
Q: Can I use this calculator for crab cakes? A: No, crab cakes contain breadcrumbs, eggs, and mayonnaise, which add significant calories and carbs. Use a recipe-specific calculator instead.
Additional Resources
For more detailed nutrition data, visit the USDA FoodData Central and search for "crab, cooked". You can also check the Seafood Health Facts website for guidance on seafood nutrition and safety.