Tomatoes Calories and Nutrition Facts
Tomatoes has 18 calories per 100 g, with 0.8 g protein, 3.3 g carbs and 0.5 g fat. Official USDA analytical record: Tomatoes, canned, red, ripe, diced (FDC ID: 333281).
One standard serving of tomatoes (1 cup (245 g)) contains 44 calories, 2g protein, 8.1g total carbs (8.1g net carbs), and 1.2g fat. Per 100 grams, it supplies 18 calories.
Energy density
0.18 kcal/g
very low
Protein / 100 kcal
4.4 g
satiety per calorie
Net carbs / 100 g
3.3 g
carbs minus fibre
100 kcal portion
556 g
≈ 19.6 oz
- Sugars
- 7.4g
- Fibre
- 0g
- Saturated fat
- 0g
- Sodium
- 306mg
Tomatoes Portion & Serving Size Comparison
Compare calories, carbs, net carbs, and macros across common household measurements.
| Portion Size | Weight | Calories | Total Carbs | Net Carbs | Protein | Fat |
|---|---|---|---|---|---|---|
| 100 g | 100 g | 18 kcal | 3.3 g | 3.3 g | 0.8 g | 0.5 g |
| 1 cup (245 g) | 245 g | 44 kcal | 8.1 g | 8.1 g | 2 g | 1.2 g |
Tomatoes, canned, red, ripe, diced nutrition facts
The table below shows the complete nutritional profile for tomatoes, canned, red, ripe, diced per 100 g (the laboratory analytical standard) and per 1 cup (245 g), alongside the share of the FDA Daily Value each nutrient covers. Most of its calories come from carbohydrate, and it is relatively low in calories.
| Nutrient | Per 100 g | Per 1 cup (245 g) | % DV* |
|---|---|---|---|
| Calories | 18 kcal | 44 kcal | — |
| Protein | 0.8 g | 2 g | 2% |
| Carbohydrate | 3.3 g | 8.1 g | 1% |
| Fat | 0.5 g | 1.2 g | 1% |
| Sugars | 3 g | 7.4 g | — |
| Fibre | 0 g | 0 g | 0% |
| Saturated fat | 0 g | 0 g | 0% |
| Sodium | 125 mg | 306 mg | 5% |
*Percent Daily Value per 100 g, against the FDA reference intakes for adults and children 4+ years (50 g protein, 275 g carbohydrate, 28 g fibre, 78 g fat, 20 g saturated fat, 2300 mg sodium). Total sugars has no Daily Value — the 50 g reference applies to added sugars only, and USDA reports total sugars here.
Tomatoes calories by weight: ounces, pounds and grams
USDA publishes this food per 100 g, so here is the same profile converted to the weights a kitchen scale and a US recipe actually use. At 0.18 kcal per gram (very low energy density), you can eat a large volume of this for very few calories, which makes it useful for filling out a meal in a deficit.
| Amount | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|
| 1 oz (28 g) | 5 kcal | 0.2 g | 0.9 g | 0.1 g |
| 100 g (3.5 oz) | 18 kcal | 0.8 g | 3.3 g | 0.5 g |
| 4 oz (113 g) | 20 kcal | 0.9 g | 3.7 g | 0.6 g |
| 8 oz / ½ lb (227 g) | 41 kcal | 1.8 g | 7.5 g | 1.1 g |
| 1 lb (454 g) | 82 kcal | 3.6 g | 15 g | 2.3 g |
Data sourced from USDA FoodData Central Foundation Foods dataset (public domain, CC0). Laboratory food profile and analytical measurements verified under USDA FDC ID 333281.
View raw USDA laboratory entry →How tomatoes compares to other vegetables
Against the 80 vegetables in this database, tomatoes ranks 7th lowest in calories and 70th highest in protein. The category averages 50 kcal per 100 g, so this one is 64% below it. The lightest option in the category is pickles, cucumber, dill or kosher dill at 12 kcal per 100 g, and the protein leader is flour, potato at 8.1 g per 100 g.
| Vegetables (by calories) | Calories | Protein | kcal/g |
|---|---|---|---|
| 🥬 Lettuce, iceberg, raw | 17 kcal | 0.7 g | 0.17 |
| 🥬 Lettuce, leaf, red, raw | 18 kcal | 0.9 g | 0.18 |
| 🍅 Tomatoes, canned, red, ripe, diced (this page) | 18 kcal | 0.8 g | 0.18 |
| 🍽️ Squash, summer, green, zucchini, includes skin, raw | 19 kcal | 1 g | 0.19 |
| 🍽️ Cabbage, bok choy, raw | 20 kcal | 1 g | 0.2 |
Portion planning with tomatoes
- 100 calories comes to about 556 g (19.6 oz).
- Macro split by calories: 63% carbs, 15% protein, 22% fat.
Nutrient screening detail
The badges near the top of this page come from screening the per-100 g values against the FDA nutrient-content thresholds in 21 CFR 101.54–101.62. The regulations define those claims per reference serving rather than per 100 g, so treat these as a like-for-like comparison between foods, not as a statement about a product label:
- Low calorie — 18 kcal per 100 g (≤ 40)
- Low fat — 0.5 g per 100 g (≤ 3 g)
- Low saturated fat — 0 g per 100 g (≤ 1 g)
- Low sodium — 125 mg per 100 g (≤ 140 mg)
- Keto-friendly — 3.3 g net carbs per 100 g (≤ 5 g)
Track tomatoes for free
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Tomatoes FAQ & Nutrition Questions
How many calories and carbs are in 1 cup (245 g) of tomatoes?
One serving of 1 cup (245 g) provides 44 calories, 8.1 g total carbs, 2 g protein, and 1.2 g fat.
How many calories are in 100 g of tomatoes?
Tomatoes contains 18 calories per 100 g, with 0.8 g protein, 3.3 g carbohydrate, and 0.5 g fat. Use the interactive calculator above to scale to any custom amount.
What is the USDA FoodData Central (FDC) ID for tomatoes?
The official USDA FoodData Central ID for "Tomatoes, canned, red, ripe, diced" is FDC ID: 333281. You can view the verified laboratory analytical record on the USDA FoodData Central Database.
What is the macronutrient breakdown of tomatoes?
By calories, tomatoes is approximately 63% carbohydrates, 15% protein, and 22% fat.
How many calories are in an ounce of tomatoes?
One ounce (28 g) of tomatoes has 5 calories, with 0.2 g protein, 0.9 g carbs and 0.1 g fat. Four ounces (113 g) comes to 20 calories, and a full pound (454 g) to 82 calories.
How much tomatoes is 100 calories?
About 556 g of tomatoes supplies 100 calories, because it carries 0.18 kcal per gram (very low energy density). You can eat a large volume of this for very few calories, which makes it useful for filling out a meal in a deficit.
Is tomatoes high or low in calories for a vegetable?
Tomatoes sits 64% below the vegetables average of 50 kcal per 100 g, ranking 7th lowest of 80 in this category.
Is this nutrition data free to use?
Yes. The data is sourced directly from USDA FoodData Central (CC0 public domain). Viewing and scaling portions here is 100% free with no sign-up — and you can log this food free in our online food diary.