Onion vs Zucchini: All Nutritional Differences

Where is more calories, protein, carbs - what is more healthy?

Onion - calories, kcal, weight, nutrition
Zucchini - calories, kcal, weight, nutrition

Fact 1: There is More Calories in Onion

At first glance, you can see that in onion is much more calories than in zucchini.

Onion has 40 kcal per 100g and zucchini 17 kcal per 100g so it is pretty easy to calculate that the difference is about 135%.

In onion and in zucchini most calories came from carbs.

See tables below to compare onion with zucchini in details.

Fact 2: Onion And Zucchini Nutrition Difference

Zucchini vs Onion: Vitamins and Minerals Comparison

per 100gOnionZucchini
Calories40 17
Carbohydrates9.34 g3.11 g
Fat0.1 g0.32 g
Dietary fiber1.7 g1 g
Protein1.1 g1.21 g
Calcium23 mg16 mg
Magnessium10 mg18 mg
Phosphorus29 mg38 mg
Potassium146 mg261 mg
Sodium4 mg8 mg
Zink0.17 mg0.32 mg
Vitaminium B1 (Thiamine)0.046 mg0.045 mg
Vitaminium B2 (riboflavin)0.027 mg0.094 mg
Vitaminium B3 (Niacin)0.116 mg0.451 mg
Vitaminium B50.123 mg0.204 mg
Vitaminium B60.12 mg0.163 mg
Vitaminium B9 (Folic acid)19 mg24 mg
Vitaminium C7.4 mg17.9 mg
Vitaminium E0.02 mg0.12 mg
Beta karoten1 mg120 mg

Less protein in onion

It is aslo easy to see see that in onion is less protein than in zucchini.

There is 1.21g per 100g of zucchini and 1.1g per 100g of onion so using simple math we can see that difference is about 10%.

More carbohydrates in onion

In onion is more carbohydrates than in zucchini.

There is 3.11g/100g of carbohydrates in zucchini and 9.34g/100g in onion so let me do the math for you again - difference is about 200%.

Less fat in onion

In onion is less fats than in zucchini.

The tables above show us that there is 0.32g/100g of fats in zucchini and 0.1g/100g in onion. In this case difference is about 220%.


  • Calories40
  • Carbohydrates9.34 g
  • Fat0.1 g
  • Dietary fiber1.7 g
  • Protein1.1 g
Onion calories per:
100g | ounce | single piece | slice | cup | sliced

Calories source

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


  • Calories17
  • Carbohydrates3.11 g
  • Fat0.32 g
  • Dietary fiber1 g
  • Protein1.21 g
Zucchini calories per:
100g | ounce | single piece | cup | sliced

Calories source

  • 62% CARBS
  • 24% PROTEIN
  • 14% FAT

Vitamins: zucchini vs onion

Minerals: onion vs zucchini

Marcin Piotrowicz
Author of this page
Marcin Piotrowicz

calories-info.com creator
Healthy diet and healthy lifestyle promoter

All information about nutrition on this website was created with help of information from the official United States Department of Agriculture database.

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