Onion vs Tomato: Which Has More Calories?
Per 100 g, Onion has 40 kcal and Tomato has 18 kcal, so Tomato has 55% fewer calories.
Onion has more carbohydrates (9.34 g vs 3.9 g). Relative to calories, Tomato is the better protein source (5 g vs 2.75 g of protein per 100 kcal).
Nutrition Facts
Serving size:
change
5g 10g 15g 20g 30g 40g 50g 60g 80g 100g 120g 140g 160g 180g 200g 220g 250g 300g 350g 400g 450g 500g 600g 700g 800g 900g 1000g
1oz 2oz 3oz 4oz 5oz 6oz 7oz 8oz 10oz 12oz 15oz 20oz 25oz 30oz 35oz 40oz 50oz
Amount Per Serving:
Serving size:
change
5g 10g 15g 20g 30g 40g 50g 60g 80g 100g 120g 140g 160g 180g 200g 220g 250g 300g 350g 400g 450g 500g 600g 700g 800g 900g 1000g
1oz 2oz 3oz 4oz 5oz 6oz 7oz 8oz 10oz 12oz 15oz 20oz 25oz 30oz 35oz 40oz 50oz
Amount Per Serving:
Onion vs Tomato 100g Compare
| per 100g | Onion | Tomato |
|---|---|---|
| Calories | 40 | 18 |
| Carbohydrates | 9.34 g | 3.9 g |
| Fat | 0.1 g | 0.2 g |
| Dietary fiber | 1.7 g | 1.2 g |
| Protein | 1.1 g | 0.9 g |
| Calcium | 23 mg | 10 mg |
| Iron | 0.21 mg | 0.3 mg |
| Magnessium | 10 mg | 11 mg |
| Potassium | 146 mg | 237 mg |
| Sodium | 4 mg | 5 mg |
| Vitaminium A | 2 IU | 833 IU |
| Vitaminium B1 (Thiamine) | 0.046 mg | 0.037 mg |
| Vitaminium B3 (Niacin) | 0.116 mg | 0.594 mg |
| Vitaminium B6 | 0.12 mg | 0.08 mg |
| Vitaminium B9 (Folic acid) | 0.019 µg | 15 µg |
| Vitaminium C | 7.4 mg | 13 mg |
| Vitaminium E | 0.02 mg | 0.54 mg |
| Beta karoten | 1 µg | 101 µg |
More Calories in Onion
At first glance, you can see that in onion is much more calories than in tomato.
Onion has 40 kcal per 100g and tomato 18 kcal per 100g so it is pretty easy to calculate that the difference is about 122%.
In onion and in tomato most calories came from carbs.
See tables below to compare onion with tomato in details.
Onion 100g
40kcalCalories source
- 88% CARBS.
- 10% PROTEIN
- 2% FAT
Tomato 100g
18kcalCalories source
- 74% CARBS
- 17% PROTEIN
- 9% FAT
Compares of onion
Compares of tomato
Related foods:
Related compares:
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.