Octopus is one of the leanest, most versatile seafood proteins around — and its carbohydrate content is surprisingly low. A plain 100 g portion of raw octopus contains only about 2.2 g of carbs, while the same weight cooked contains roughly 4.4 g because cooking removes water and concentrates nutrients. That makes octopus a favorite for low-carb, keto, and diabetic meal plans, especially when it is served boiled, grilled, or lightly dressed rather than battered or glazed.
This Octopus Carbs Calculator lets you estimate total carbs, net carbs, protein, fat, and calories for any portion size in grams, ounces, or pounds. Just enter your portion, choose raw or cooked preparation, and see how octopus fits into your daily macro goals. No more guessing at restaurant servings or flipping through nutrition tables — get a clear carb count in seconds.
🐙 Octopus Carb Calculator
Estimate total carbs, net carbs, and calories for any octopus portion.
How to Use This Tool
Start by entering your octopus portion in the amount field and choosing whether it is measured in grams, ounces, or pounds. Next, select the preparation that matches your meal: raw/fresh octopus or cooked (boiled/steamed). When you click Calculate, the tool reports total carbs and net carbs for that exact portion, and if the macro breakdown checkbox is enabled it also shows protein, fat, and calories. The breakdown section walks through the math step by step so you can confirm the numbers.
For quick entry, use the preset buttons for common servings like 1 oz, 3 oz, 4 oz, and 100 g. These presets automatically switch the unit to grams and run the calculation. You can also hit Copy to copy the carb summary to your clipboard for a meal log. The Reset button returns everything to the default 4 oz cooked portion.
Formula Explained
The calculator scales standard nutrient values that are reported per 100 g of edible octopus. Because USDA nutrient data are expressed per 100 g, the first step is always to convert your portion to grams. The conversion factors are: 1 oz = 28.3495 g and 1 lb = 453.592 g. Then the per-100 g value is multiplied by the portion factor:
Since octopus contains no dietary fiber, net carbs equal total carbs.
The same scaling applies to protein, fat, and calories. Raw octopus values are about 2.2 g carbs, 14.9 g protein, 1.0 g fat, and 76 calories per 100 g. Cooked octopus is concentrated because moisture is lost during heating, giving roughly 4.4 g carbs, 29.8 g protein, 2.1 g fat, and 164 calories per 100 g.
Reference Table
Here are pre-calculated values for common octopus serving sizes, based on the same per-100 g figures used by the calculator.
| Portion | Prep | Carbs | Net Carbs | Protein | Calories |
|---|---|---|---|---|---|
| 28 g (1 oz) | Raw | 0.6 g | 0.6 g | 4.2 g | 21 |
| 85 g (3 oz) | Raw | 1.9 g | 1.9 g | 12.7 g | 65 |
| 100 g | Raw | 2.2 g | 2.2 g | 14.9 g | 76 |
| 28 g (1 oz) | Cooked | 1.2 g | 1.2 g | 8.3 g | 46 |
| 85 g (3 oz) | Cooked | 3.7 g | 3.7 g | 25.3 g | 139 |
| 100 g | Cooked | 4.4 g | 4.4 g | 29.8 g | 164 |
Values are rounded to one decimal place, so small differences may appear compared with manual calculations on the full nutrition data.
Worked Examples
Tips & Best Practices
Weigh octopus before adding sauces, marinades, or oil. A honey-garlic glaze can add 10–20 g of sugar per tablespoon, quickly turning a keto-friendly dish into a higher-carb meal. The calculator covers the octopus itself, so add any dressing or marinade separately if you track macros closely.
For meal prep, remember that cooked octopus is nutrient-denser by weight. If you portion out 100 g of cooked octopus after boiling, it represents more protein and calories than 100 g of raw octopus. Stick to one preparation type when comparing portions from different days.
Factors Affecting Accuracy
The nutrition values are averages from USDA FoodData Central and can vary with species, season, and cooking method. Deep-fried or breaded octopus will have added carbs from batter, and octopus simmered in a sugar-heavy broth will absorb some carbohydrates. The calculator is most accurate for plain boiled, grilled, or raw octopus.
Differences between whole octopus and cleaned tentacles are usually small, but discarding skin or organs can shift the numbers slightly. When in doubt, use the cooked values for any ready-to-eat octopus that has been boiled or steamed.
Frequently Asked Questions
Is octopus keto-friendly?
Yes. Even a generous 150 g cooked serving supplies only about 6.6 g of carbs, well within a standard keto allowance of 20–50 g net carbs per day. Its high protein content also makes it very satiating.
Why does cooked octopus have more carbs by weight?
Cooking removes water and firms the flesh, so the same weight contains a higher concentration of protein, carbs, and calories — not because carbs are added. If you use raw or cooked values consistently, your daily totals will stay accurate.
Are there carbs in octopus marinades?
Plain octopus is nearly carb-free, but marinades and sauces often contain sugar, honey, balsamic vinegar, or teriyaki glaze. Check the label or recipe and add those grams to the calculator's result for your final dish.
Nutrient references: USDA FoodData Central.