Fennel vs Onion: Which Has More Calories?


Per 100 g, Fennel has 31 kcal and Onion has 40 kcal, so Fennel has 23% fewer calories.

Fennel has more fiber (3.1 g vs 1.7 g). Onion has more carbohydrates (9.34 g vs 7.29 g). Relative to calories, Fennel is the better protein source (4 g vs 2.75 g of protein per 100 kcal).

Fennel - calories, kcal, weight, nutrition
Fennel - calories, kcal, weight, nutrition

Nutrition Facts

Fennel
Serving size:
  change
one fennel (180g)cup, sliced (87g)
5g10g15g20g30g40g50g60g80g100g120g140g160g180g200g220g250g300g350g400g450g500g600g700g800g900g1000g
1oz2oz3oz4oz5oz6oz7oz8oz10oz12oz15oz20oz25oz30oz35oz40oz50oz

Amount Per Serving:
Calories

% Daily Value

Total Fat g
0%

Saturated Fat g
0%

Cholesterol mg
0%

Sodium mg
0%

Total Carbohydrates g
0%

Dietary Fiber g
0%

Sugars g

Protein g
0%

Vitaminium C mg
0%

Calcium mg
0%

Iron mg
0%

Potassium mg
0%

Glycemic Index: 

* The % Daily Value (DV) shows how much a nutrient in one serving of food contributes to your total daily diet. A 2000-calorie daily intake is used as a general guideline for nutrition advice.
Onion
Serving size:
  change
one onion (110g)slice (15g)cup, sliced (115g)
5g10g15g20g30g40g50g60g80g100g120g140g160g180g200g220g250g300g350g400g450g500g600g700g800g900g1000g
1oz2oz3oz4oz5oz6oz7oz8oz10oz12oz15oz20oz25oz30oz35oz40oz50oz

Amount Per Serving:
Calories

% Daily Value

Total Fat g
0%

Saturated Fat g
0%

Cholesterol mg
0%

Sodium mg
0%

Total Carbohydrates g
0%

Dietary Fiber g
0%

Sugars g

Protein g
0%

Vitaminium C mg
0%

Calcium mg
0%

Iron mg
0%

Potassium mg
0%

Glycemic Index: 15

* The % Daily Value (DV) shows how much a nutrient in one serving of food contributes to your total daily diet. A 2000-calorie daily intake is used as a general guideline for nutrition advice.

Fennel vs Onion 100g Compare


per 100gFennelOnion
Calories31 40
Carbohydrates7.29 g9.34 g
Fat0.2 g0.1 g
Dietary fiber3.1 g1.7 g
Protein1.24 g1.1 g
Calcium49 mg23 mg
Iron0.73 mg0.21 mg
Magnessium17 mg10 mg
Potassium414 mg146 mg
Sodium52 mg4 mg
Vitaminium A134 IU2 IU
Vitaminium B1 (Thiamine)0.01 mg0.046 mg
Vitaminium B2 (riboflavin)0.032 mg0.027 mg
Vitaminium B3 (Niacin)0.64 mg0.116 mg
Vitaminium B50.232 mg0.123 mg
Vitaminium B60.047 mg0.12 mg
Vitaminium B9 (Folic acid)27 µg0.019 µg
Vitaminium C12 mg7.4 mg

Less Calories in Fennel

At first glance, you can see that in fennel is less calories than in onion.

Fennel has 31 kcal per 100g and onion 40 kcal per 100g so it is pretty easy to calculate that the difference is about 29%.

In fennel and in onion most calories came from carbs.

See tables below to compare fennel with onion in details.

Fennel 100g

31kcal

Calories source

  • 81% CARBS.
  • 14% PROTEIN
  • 5% FAT

Onion 100g

40kcal

Calories source

  • 88% CARBS
  • 10% PROTEIN
  • 2% FAT

About the data

Nutrition values on this page are given per 100 g of the food and are based on the official United States Department of Agriculture FoodData Central database. The exact record used for each food is linked under the tables.

Marcin Piotrowicz – calories-info.com creator · Healthy diet and healthy lifestyle promoter. The information is for general purposes and is not medical or dietary advice.