1 piece (medium) of Crab (120 g) has 104 calories. That works out to 87 calories per 100 g. It contains 1 g of carbs, 21.6 g of protein, 1.3 g of fat and 0 g of fiber. Its 13.8 µg of B12 covers 575% of the Daily Value. Its glycemic index is 0 (low), so it raises blood sugar slowly.

Crab Nutrition Facts

Selected: 100 g

KCAL / 100G

Carbs

0.8g

· 0% DV

Protein

18g

· 36% DV

Fat

1.1g

· 1% DV

Fiber

· 0% DV

DV is the share of the daily value covered, on a 2,000 kcal reference diet.

Calories come from: Carbs 4% · Protein 85% · Fat 11%

Crab Vitamins & Minerals

Vitamins

B12

11.5µg · 479% DV

0.7mg · 14% DV

Vitamin E

1.9mg · 13% DV

Folate

42µg · 11% DV

Minerals

Copper

1mg · 111% DV

Selenium

44µg · 80% DV

Zinc

8mg · 73% DV

Phosphorus

220mg · 31% DV

How Nutritious Is Crab?

Nutrient density

Very high

80/ 100

How many vitamins, minerals and how much fiber this food carries per calorie. A high score means a lot of nutrition for few calories.

Satiety score

Medium

58/ 100

An EatBetter score computed from fiber, protein and calorie density. A high score means staying full longer on the same calories.

Both scores are calculated per 100 g and do not change with the selected portion. The satiety score is EatBetter's own calculation, not a clinical measure.

Crab Glycemic Index

GLYCEMIC INDEX

Low

0 Low5570100

GLYCEMIC LOAD

Low

Accounts for portion size — a more realistic measure than GI alone.

How to Burn Off Crab

To burn the 87 calories in 100 g:

🚶

22min

Walking (5 km/h)

🏃

9min

Running (8 km/h)

🚴

12min

Cycling

🏊

10min

Swimming

Times are calculated with the MET equation for a 70 kg adult. Actual burn varies with your weight, age and pace.

Is Crab Processed?

NOVA 1

Unprocessed

1. Unprocessed

2. Minimally Processed

3. Processed

4. Ultra-Processed

NOVA classifies foods into 4 groups by industrial processing. NOVA 1 (unprocessed) is the healthiest.

Does Crab Contain Allergens?

No known major allergens

Gluten free

Dairy free

Eggs free

Peanuts free

Tree nuts free

Fish free

Soy free

Sesame free

Which Diets Is Crab Good For?

Vegan

— Not suitable

Vegetarian

— Not suitable

Gluten-Free

✓ Suitable

Dairy-Free

— Not suitable

Mediterranean

✓ Suitable

Paleo

✓ Suitable

Whole30

— Not suitable

DASH

— Not suitable

Keto

✓ Suitable

Low FODMAP

— Not suitable

Crab Fat Profile

SATURATED

0.2g

MONOUNSATURATED

0.2g

POLYUNSATURATED

0.4g

⚖️

Omega 6:3 ratio 0.2:1

Below the ideal 4:1 — a good omega balance.

Compare Crab

🦀vs🐟

Crab vs Salmon Fillet119 kcal fewer per 100 g

→🦀vs🐟

Crab vs Canned Tuna29 kcal fewer per 100 g

→🦀vs🐟

Crab vs Fish23 kcal fewer per 100 g

→🦀vs🐟

Crab vs Tuna45 kcal fewer per 100 g

→

Foods Similar to Crab

🐟

Salmon Fillet

206 kcal

🐟

Canned Tuna

116 kcal

🐟

Fish

110 kcal

🐟

Tuna

132 kcal

🐟

Baked Sea Bass

110 kcal

🐟

Grilled Sea Bass

124 kcal

🐟

Whiting

90 kcal

🦪

Stuffed Mussels

175 kcal

Frequently Asked Questions About Crab

How many calories and how much protein are in crab?

Crab provides 87 calories and 18 g of protein per 100 g. It contains 1.1 g of fat and 0.8 g of carbohydrates per 100 g.

Is crab suitable for a keto diet?

Yes, crab is suitable for a keto diet. It has just 0.8 g of carbohydrates per 100 g and a glycemic index of 0.

Have another question about Crab?

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Nutrition data compiled from USDA FoodData Central and scientific sources.

· Last updated: September 23, 2026