Octopus is a lean, protein-rich seafood that fits beautifully into low-carb, keto, and high-protein meal plans. This calculator helps you estimate the calories, protein, fat, carbohydrates, and key micronutrients in any portion of cooked octopus — whether you're tracking macros, managing sodium intake, or simply curious about the nutritional profile of your favorite Mediterranean dish.
Simply enter the weight of your octopus portion, choose the unit (grams or ounces), and optionally adjust for cooking method (boiled, grilled, or raw) to get a detailed breakdown. The tool also provides a per-serving summary and a step-by-step explanation of how each value is derived, so you can trust the numbers and apply them to your daily goals.
Whether you're a home cook, a fitness enthusiast, or a dietitian planning meals, this calculator offers a quick and reliable reference for octopus nutrition. Use it alongside your favorite recipes to keep your meals balanced and informed.
🐙 Octopus Nutrition Calculator
How to Use This Tool
Enter the weight of your octopus portion in the input field, select the unit (grams or ounces), and choose the cooking method that matches how you prepared it. The calculator then estimates the calorie and macronutrient content based on standard USDA reference values for cooked octopus. You can also use the quick-fill buttons to instantly load common portion sizes like 100 g or 4 oz.
For the most accurate results, weigh your octopus after cooking, as water loss during cooking concentrates nutrients. If you're tracking a recipe, you can add the raw weight and adjust the cooking method to 'raw' to see the difference.
Nutritional Profile of Octopus
Octopus is a nutrient-dense seafood that is particularly high in protein and low in fat. A 100-gram serving of boiled octopus provides roughly 15 grams of protein, only 1 gram of fat, and about 2 grams of carbohydrates, making it an excellent choice for low-carb and ketogenic diets. It's also a good source of iron, potassium, and B vitamins, though it is naturally high in sodium — something to keep in mind if you're watching your salt intake.
Compared to other seafood like shrimp or white fish, octopus offers a similar protein content but with a slightly higher mineral density. Its chewy texture and mild flavor make it a versatile ingredient in salads, stews, and grilled dishes.
Formula Explained
The calculator uses a simple proportional method: it takes the nutrient values per 100 grams of cooked octopus and multiplies them by your portion weight divided by 100. For example, if you eat 150 grams of boiled octopus, the protein calculation would be (14.9 g × 150) / 100 = 22.35 g. The same logic applies to calories, fat, carbohydrates, and micronutrients.
Values are based on data from the USDA FoodData Central, which provides standardized nutritional information for a wide range of foods. Cooking method adjustments are approximate and based on typical water loss and fat absorption during grilling or boiling.
Worked Examples
Example 1: You eat a 200 g portion of grilled octopus. The calculator estimates 180 kcal, 32 g protein, 2.4 g fat, and 4 g carbs. This fits well into a high-protein meal plan.
Example 2: A 4 oz (about 113 g) serving of boiled octopus provides roughly 93 kcal and 17 g protein. That's a great post-workout snack when paired with a salad.
Common Mistakes to Avoid
- Using raw weight when you actually ate cooked octopus — cooking reduces water content, so nutrient density per gram increases.
- Forgetting to account for added oil or butter in recipes, which can significantly increase the fat and calorie content.
- Assuming all seafood has the same sodium level — octopus is naturally higher in sodium than many fish, so check labels if you're on a low-sodium diet.
Frequently Asked Questions
Is octopus good for weight loss? Yes, its high protein and low calorie content can help you feel full while keeping your calorie intake in check. Just be mindful of portion sizes and cooking fats.
Can I eat octopus on a keto diet? Absolutely. With only about 2 grams of carbs per 100 grams, octopus is a keto-friendly protein source.
How does octopus compare to other seafood? It's similar to shrimp and crab in protein but offers more iron and potassium. It's also lower in fat than fatty fish like salmon.
For more seafood nutrition tools, you might also find the trout nutrition calculator useful, or explore our octopus sugar calculator for a specific nutrient focus.