Octopus is one of the leanest, highest-protein seafoods you can buy, yet its calorie count changes noticeably depending on how it is prepared. Raw octopus is mostly water and very low in calories, while cooked, grilled, or canned versions are more concentrated — which means the same weight can deliver very different numbers. This octopus calories per serving calculator converts any serving amount in grams, ounces, or pounds into a clear calorie estimate, and it also breaks down the protein, fat, and carbohydrate totals for the preparation you choose.
Use it to plan high-protein meals on a low-carb or pescatarian diet, to log portions accurately in a food diary, or simply to scale a recipe that feeds four instead of two. Enter your serving weight, pick the preparation state, and set the number of servings — the results show calories per serving, batch totals, and an optional macronutrient breakdown with visual bars. Quick-fill presets make it easy to estimate common restaurant-sized portions.
🐙 Octopus Calories Per Serving Calculator
📊 Macronutrients per serving
How This Calculator Works
This tool uses the standard nutrition principle that all calorie and macronutrient figures are expressed per 100 grams of edible octopus. Once you enter your serving size in grams, ounces, or pounds, the calculator converts that amount to grams, then applies the appropriate per-100g values for the preparation state you select. The per-serving result is multiplied by the number of servings to give you the batch total.
Reference Values by Preparation
The following values are approximate averages compiled from USDA FoodData Central entries and common food databases. Actual values vary with the size of the animal, cooking method, added oils, and draining technique.
| Preparation | kcal per 100 g | Protein (g) | Fat (g) | Carbs (g) |
|---|---|---|---|---|
| Raw | 82 | 14.9 | 1.0 | 2.2 |
| Boiled / cooked | 164 | 29.8 | 2.1 | 2.2 |
| Grilled / baked | 154 | 25.4 | 1.8 | 2.2 |
| Canned (drained) | 98 | 17.2 | 1.4 | 2.2 |
Source: USDA FoodData Central and published seafood nutrition references. Values are rounded.
Step-by-Step Example
Suppose you grill an octopus tentacle and weigh out 200 g of cooked meat for dinner. The calculator takes the grilled value of 154 kcal per 100 g, so 200 g is 308 kcal. With 2 servings, the total becomes 616 kcal — enough to plan sides or adjust portions for the rest of the day.
Tips for Accurate Serving Sizes
- Weigh octopus after cooking, because it loses water and shrinks. Weighing raw and then using the raw value can undercount calories if you actually ate the cooked weight.
- If you add oil, butter, or marinade during grilling, those added fats are not included in the base values. Add them separately if precision matters.
- For canned octopus, drain well and gently pat dry before weighing; the packing liquid can add 10–15% extra weight.
- Boneless, skinless octopus is the typical serving; if you weigh with sauce or other ingredients, the count changes.
Limitations & Notes on Nutrition Data
Nutrition figures are estimates, not lab results for your specific piece. Seafood composition depends on species, season, diet, and cooking time. Boiled octopus calories can change depending on whether salt water or oil is used. Use this tool for meal planning and rough food logging, not for medical or clinical purposes. If you are tracking macros for a competition diet, always cross-check with the exact product label or a certified database.
Frequently Asked Questions
Why does cooked octopus have more calories than raw octopus? Cooking removes water and concentrates proteins and other nutrients, so the same weight contains more dry matter and therefore more calories.
Is octopus keto-friendly? Yes. Even the most calorie-dense cooked version provides less than 3 g of carbs per 100 g, making it a strong low-carb protein option.
Should I weigh octopus before or after cooking? Weigh after cooking if you are logging the meal you actually eat, because moisture loss changes the weight. If you meal-prep from raw portions, raw weight is fine — just use the raw calorie value.
Additional Resources
For more detailed nutrient data, search for "octopus" in the USDA FoodData Central database. You can also read about octopus in the human diet on Wikipedia, and check FAO species pages for biological notes on Octopus vulgaris.