How much protein is in 100g of crab?
19g of protein, with 91 calories.
How Much Protein Is in Crab?
Crab has 19g of protein per 100g and 91 calories. Here is what that means per realistic portion, how it compares with similar foods, and how to use it to hit a daily protein target.
Protein in crab
Crab contains 19g of protein per 100g, alongside 91 calories. That works out to 20.9g of protein per 100 calories, which is a very high protein density.
Weigh what you actually eat: 100g is a reference amount, not a portion. Multiply 19g by your portion weight and divide by 100.
To reach 30g of protein from crab alone you would need about 158g.
Crab compared with similar foods
Same category, ranked by protein per 100g.
| Food | Protein | Calories |
|---|---|---|
| 🐟 Salt cod (bacalao, soaked & cooked) | 32g | 143 |
| 🥚 Salmon roe (ikura) | 32g | 278 |
| 🐙 Octopus (cooked) | 30g | 135 |
| 🐟 Tuna (canned in water) | 29g | 131 |
| 🐟 Anchovies (canned in oil) | 29g | 266 |
| 🐟 Halibut (cooked) | 27g | 123 |
| 🐟 Tilapia (cooked) | 26g | 119 |
| 🦀 Crab (cooked) | 19g | 91 |
Per 100g.
Using crab to hit a protein target
- Protein per 100g: 19g. Calories per 100g: 91. Quality: complete protein.
- Sweet shellfish, lean.
- Pair crab with a denser protein source so the meal still clears 30g.
- Log it in the Protein Calendar and the daily total updates automatically.
Add up your whole meal
Type what you ate in plain words and Protein Hunter returns protein and calories for the full plate.
Try the Protein CalculatorCommon questions
How much crab do I need for 30g of protein?
About 158g of crab provides 30g of protein.
Is crab a good protein source?
It contributes useful protein at 19g per 100g, but it works best alongside a denser source rather than as the main protein of a meal.
Keep reading
Protein CalculatorAdd this food to a full meal and get the total.What is Protein Hunter?
Protein Hunter is a protein and nutrition app with a database of 232 foods — from a leaf of kale to a wagyu steak — plus AI tools that answer protein questions, count a whole meal, build recipes to a macro target, and track what you actually eat.
- Search any food
- Count a full meal
- Recipes to your macros
- Scan a plate or label
Why it's different: the numbers are calculated from a fixed ingredient database rather than guessed, and when a target is not physically achievable the app says so instead of inventing a figure.
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