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Fennel has 31 kcal per 100 g. A mild anise-flavored bulb vegetable. Slice thin and eat raw in salads or braise until caramelized. The fronds are edible too.

About this food

How should I track Fennel?

Fennel is a good source of fiber. For consistent tracking of Fennel, weigh it raw. Cooking method changes both weight and calorie density — steaming barely changes anything, but roasting with oil or frying can double the calories. A systematic review (Whitton et al., Adv Nutr 2022) found vegetables are omitted from food logs 2–85% of the time, often because people assume they are "free" calorically. While most vegetables are indeed low-calorie, the fats added during cooking are not. Log the oil, butter, or dressing separately to keep your tracking accurate.

Macro Breakdown

Macro Split: 13% Protein, 82% Carbs, 5% FatCarbs82%
Protein13%1.2g
Carbs82%7.3g
Fat5%0.2g

Nutrition Facts

Per 100g. Percentages reflect Daily Value (DV).

Energy
  • Calories
    31kcal—
Macronutrients
  • Protein
    1.2g2%
  • Carbohydrates
    7.3g—
  • Fat
    0.2g—
  • Fiberathlete
    3.1g11%
  • Sugar
    3.9g—
  • Saturated Fat
    0.0g—
Minerals
  • Sodium
    52mg—
  • Calciumathlete
    49mg4%
  • Ironathlete
    1mg4%
Vitamins
  • Vitamin Dathlete
    0.0mcg0%

% Daily Value based on FDA 2,000 kcal reference diet. Strength trainees have different needs — see highlighted nutrients.

Serving Calculator

Serving Calculator

Fennel — values for 87g

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Primary macros

Calories
27
kcal
Protein
1.0
g
Carbs
6.4
g
Fat
0.2
g

More nutrients

Fiber
2.7g
Sugar
3.4g
Sat. Fat
0.0g
Sodium
45mg
Calcium
43mg
Iron
1mg
Potassium
360mg
Magnesium
15mg
Zinc
0mg
Vitamin D
0.0mcg
Nutrient highlights
Good Source of Fiber

Frequently Asked Questions

Fennel is a good source of fiber. For consistent tracking of Fennel, weigh it raw. Cooking method changes both weight and calorie density — steaming barely changes anything, but roasting with oil or frying can double the calories. A systematic review (Whitton et al., Adv Nutr 2022) found vegetables are omitted from food logs 2–85% of the time, often because people assume they are "free" calorically. While most vegetables are indeed low-calorie, the fats added during cooking are not. Log the oil, butter, or dressing separately to keep your tracking accurate.

Fennel contains 1.2g protein per 100g, which is lower in protein. A 87g serving provides 1.0g protein.

Notable nutrients in Fennel include Fiber. Per 100g: 1.2g protein, 7.3g carbs, and 0.2g fat.

Yes, Fennel can support weight loss. At 31 kcal per 100g it is low in calorie density, allowing larger portions for fewer calories.

Yes, Fennel is keto-friendly. With 7.3g total carbs and 3.1g fiber per 100g (4.2g net carbs), it fits easily within the daily 20-50g net carb limit.

Fennel provides 31 kcal, 1.2g protein, 7.3g carbs, and 0.2g fat per 100g. Compare with other vegetables foods in our database to find the best option for your nutritional goals.

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87g(Standard)
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Beverages

Oat milk, unsweetened

47 kcal1.0g protein

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Vegetables

Fennel

Macros per 100g

31
Calories
Protein1.2g
Fat0.2g
Carbs7.3g
Article research basis
1,316Papers Analyzed
4,659Foods in Database
100%Peer-Reviewed Sources
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Reviewed by Calibr8

Peer-reviewed data · Last updated March 22, 2026

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