Octopus is a lean, protein-rich seafood that fits well into calorie-conscious and high-protein diets. This calculator helps you estimate the calories in any portion of cooked octopus based on its weight, using a standard value of 1.64 kcal per gram. Whether you're tracking macros, planning a meal, or just curious about your serving, this tool gives you a quick and accurate answer.
Simply enter the weight of your octopus (in grams or ounces), choose the cooking method (boiled, grilled, or raw), and optionally adjust for any added oil or butter. The calculator will show total calories, calories from protein, and a per-100g breakdown. It's perfect for fitness enthusiasts, dietitians, and home cooks who want precise nutrition data without guesswork.
🐙 Octopus Calorie Calculator
Oil adds about 9 kcal per gram, 120 kcal per tablespoon.
How to Use This Tool
Enter the weight of your octopus portion in grams or ounces. Select the cooking method — boiled, grilled, or raw — because cooking method affects calorie density. If you added oil, butter, or another fat during cooking, enter that amount (in grams or tablespoons) to get a more accurate total. Click Calculate Calories to see your results. Use the quick-fill buttons to instantly test common portion sizes like 100 g or 4 oz.
How It Works
The calculator uses standard nutrition data for octopus. Raw octopus contains about 0.82 kcal per gram, while boiled octopus is about 1.64 kcal per gram due to water loss and concentration of nutrients. Grilled octopus is slightly higher at about 1.75 kcal per gram because grilling removes more moisture. These values are based on USDA FoodData Central entries for raw and cooked octopus.
For added fats, we use the general energy density of 9 kcal per gram for oil and butter. One tablespoon of oil is approximately 13.5 grams, so it contributes about 120 kcal. The protein calorie estimate assumes that about 30% of the calories in octopus come from protein, which is a reasonable approximation given octopus is very lean.
Worked Examples
Example 1: You eat 150 g of boiled octopus with no added oil. Calories = 150 × 1.64 = 246 kcal. Protein calories ≈ 150 × 0.30 × 4 = 180 kcal.
Example 2: You grill 200 g of octopus and add 1 tablespoon of olive oil. Base calories = 200 × 1.75 = 350 kcal. Oil adds 13.5 g × 9 = 121.5 kcal. Total = 471.5 kcal.
Tips & Best Practices
- Weigh octopus after cooking for the most accurate calorie count, as water loss changes density.
- If you eat the whole octopus including tentacles, the calorie value is similar; the difference is minimal.
- Be mindful of marinades and sauces — they can add significant calories. Enter them separately if you know their nutrition.
- For meal prep, calculate calories per serving by dividing the total by the number of servings.
Factors Affecting Accuracy
The calorie values are averages and can vary based on the species of octopus, its size, and the exact cooking time. Larger octopuses may have slightly different fat content. Also, if you use a lot of oil, the calorie contribution can be substantial — always include it for accurate tracking. The protein percentage is an estimate; actual protein content can range from 25% to 35% of calories.
Frequently Asked Questions
Is octopus good for weight loss?
Yes, octopus is low in calories and fat while being high in protein, making it a filling and nutritious choice for weight management.
How many calories are in 100 g of boiled octopus?
About 164 kcal per 100 g, according to standard nutrition data.
Does cooking method change calories?
Yes, because cooking removes water, concentrating calories. Raw octopus has fewer calories per gram than cooked.
Can I use this for other seafood?
No, this calculator is specific to octopus. For other seafood, use a dedicated nutrition calculator.
Additional Resources
For more detailed nutrition information, you can refer to the USDA FoodData Central database, which provides comprehensive nutrient profiles for octopus and many other foods.