Seafood
Crab nutrition facts
A 1 undetermined cup (not packed) (135 g) serving of crab provides 112 calories, 24 g protein, 0 g carbohydrate, and 1 g fat — about 91% of its calories from protein, 0% from carbohydrate, and 9% from fat. The interactive label below toggles between a serving and 100 g.
Calorie split
Vitamins & minerals
Per serving (135 g)
- Vitamin C
- 4.46 mg
- Vitamin A (RAE)
- 1.35 mcg
- Vitamin E
- 2.48 mg
- Vitamin K
- 0.41 mcg
- Thiamin (B1)
- 0.03 mg
- Riboflavin (B2)
- 0.13 mg
- Niacin (B3)
- 3.71 mg
- Vitamin B6
- 0.21 mg
- Folate (DFE)
- 68.9 mcg
- Vitamin B12
- 4.50 mcg
- Magnesium
- 48.6 mg
- Phosphorus
- 316 mg
- Zinc
- 5.14 mg
- Copper
- 1.10 mg
- Manganese
- 0.10 mg
- Selenium
- 57.9 mcg
Nutrition highlights
Per 1 undetermined cup (not packed) (135 g), crab is an excellent source of Vitamin B12, Copper, Selenium, Protein, Zinc, Phosphorus, and Niacin and a good source of Vitamin E, Folate, Vitamin B6, Magnesium, and Riboflavin.
Relatively high in Cholesterol and Sodium per serving — worth noting if you are limiting them.
% of the FDA Daily Value per 1 undetermined cup (not packed) (135 g) serving.
Key metrics
Nutrient density
Per 100 kcal, crab delivers about 17% of a Daily Value on average across 22 beneficial nutrients. The score is its percentile for that measure among the 177 foods in our database — higher means more nutrition per calorie. How this is calculated.
Density counts protein, fiber, and vitamins and minerals (not fat, sodium, or sugar), each capped so a single nutrient can’t dominate, with a calorie floor so very-low-calorie foods aren’t overstated. It measures nutrition per calorie within our database — a useful guide, not a complete verdict on how “healthy” a food is.
Similar foods & swaps
The closest seafood to crab by nutrition (per 100 g), and how each differs.
Protein quality
As an animal-source protein, crab is a complete protein — it supplies all nine essential amino acids on its own, so it doesn’t need to be paired with another protein source.
Questions
- How many calories are in crab?
- A 1 undetermined cup (not packed) (135 g) serving of crab has about 112 calories. Per 100 g, it has 83 calories — a low calorie density.
- How much protein is in crab?
- Crab provides about 24 g of protein per 1 undetermined cup (not packed) (135 g) serving, which is 48% of the Daily Value — an excellent source.
- What are the macros in crab?
- Per serving, crab has roughly 24 g protein, 0 g carbohydrate, and 1 g fat. By calories, that is 91% protein, 0% carbohydrate, and 9% fat.
- Is crab high in protein?
- Crab has a protein density of about 21.5 g per 100 kcal, and 91% of its calories come from protein. Foods above roughly 10 g per 100 kcal are generally considered protein-dense.
- What vitamins and minerals are in crab?
- Per 1 undetermined cup (not packed) (135 g), crab is a notable source of Vitamin B12, Copper, Selenium, Zinc, Phosphorus, and Niacin. The label above lists the full micronutrient profile with % Daily Values.
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References & methodology
- Data source: U.S. Department of Agriculture, Agricultural Research Service — FoodData Central, FDC ID 174205 (public domain).
- Daily Values: FDA Nutrition Facts label, 2016 update (adults and children aged 4+).
- Source claims: a serving supplying 10–19% of the Daily Value is a “good source”; 20% or more is an “excellent source” (FDA, 21 CFR 101.54).
- Calorie split: Atwater general factors — 4 kcal/g for protein and carbohydrate, 9 kcal/g for fat.
- Last reviewed: June 2026. Values are typical figures and vary with variety, ripeness, and preparation.
NutriFactsHub. “Crab Nutrition Facts.” https://www.nutrifactshub.com/foods/crab