In short: 100 g of tomato contains 18 calories, 0.88 g of protein, 3.9 g of carbohydrate and 0.2 g of fat. A cup cherry tomatoes (149 g) portion has about 27 calories and 1.3 g of protein.
Below are the full values per 100 g and per typical portion, taken from the USDA FoodData Central figure for this exact food, followed by what those numbers mean in practice.
| Nutrient | Per 100 g | Per cup cherry tomatoes |
|---|---|---|
| Calories | 18 kcal | 27 kcal |
| Protein | 0.88 g | 1.3 g |
| Total fat | 0.2 g | 0.3 g |
| Saturated fat | 0.03 g | 0.04 g |
| Monounsaturated fat | 0.03 g | 0.05 g |
| Polyunsaturated fat | 0.08 g | 0.12 g |
| Carbohydrate | 3.9 g | 5.8 g |
| Dietary fiber | 1.2 g | 1.8 g |
| Total sugars | 2.6 g | 3.9 g |
| Cholesterol | 0 mg | 0 mg |
| Sodium | 5 mg | 7.5 mg |
It is low in sodium, at 5 mg per 100 g.
| Nutrient | Per 100 g | Per cup cherry tomatoes |
|---|---|---|
| Potassium | 237 mg | 353 mg |
| Calcium | 10 mg | 15 mg |
| Iron | 0.27 mg | 0.4 mg |
| Magnesium | 11 mg | 16 mg |
| Zinc | 0.17 mg | 0.25 mg |
| Selenium | 0 µg | 0 µg |
| Nutrient | Per 100 g | Per cup cherry tomatoes |
|---|---|---|
| Vitamin A | 42 µg | 63 µg |
| Vitamin C | 14 mg | 20 mg |
| Vitamin D | 0 µg | 0 µg |
| Vitamin E | 0.54 mg | 0.8 mg |
| Vitamin K | 7.9 µg | 12 µg |
| Thiamin | 0.04 mg | 0.06 mg |
| Riboflavin | 0.02 mg | 0.03 mg |
| Niacin | 0.59 mg | 0.89 mg |
| Vitamin B-6 | 0.08 mg | 0.12 mg |
| Vitamin B-12 | 0 µg | 0 µg |
| Folate | 15 µg | 22 µg |
| Choline | 6.7 mg | 10 mg |
How it compares with similar foods
Protein per calorie is the measure that matters when the goal is to hit a protein target without overshooting total energy. By protein per 100 calories it ranks 53rd out of 109 foods in this reference. Within fruit and vegetables, the highest are:
| Food | Protein | Calories |
|---|---|---|
| Mushrooms | 3.1 g | 22 kcal |
| Cooked Spinach | 3 g | 23 kcal |
| Spinach | 2.9 g | 23 kcal |
How to use these numbers
Percentages of daily value are calculated from the FDA Daily Values used on US nutrition labels, which assume a 2,000 calorie diet; your own targets may be higher or lower. If you want the values for your own body weight and activity level rather than a reference diet, the protein and macro calculator turns a calorie and protein target into numbers you can use.
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Source
All values come from USDA FoodData Central (SR Legacy), food ID 170457, published under CC0 1.0 as public domain data. Values are per 100 g of the food as described: Tomatoes, red, ripe, raw, year round average.