Tomato: calories, protein, vitamins
USDA FoodData Central data, retrieved October 2026 · state: fresh
Tomato: 18 kcal, 0.9 g protein, 0.2 g fat and 3.9 g carbohydrate per 100 g. A typical portion is 1 medium tomato (120 g): about 22 kcal. Below you will find a table with the share of the daily reference, a comparison with five similar foods and where the numbers come from.
- Good source of vitamin C · 17%
- Low in calories
- Low in carbohydrate
- Low in fat
| Nutrition | per 100 g | % daily value | portion (120 g) | % daily value |
|---|---|---|---|---|
| Calories | 18 kcal | 1% | 22 kcal | 1% |
| Protein | 0.88 g | 2% | 1.06 g | 2% |
| Fat | 0.2 g | — | 0.24 g | — |
| Carbohydrate | 3.89 g | — | 4.67 g | — |
| Fibre | 1.2 g | 4% | 1.44 g | 5% |
| Sugar(limit) | 2.63 g | 3% | 3.16 g | 4% |
| Saturated fat(limit) | 0.03 g | 0% | 0.03 g | 0% |
| Sodium(limit) | 5 mg | 0% | 6 mg | 0% |
| Vitamin C | 13.7 mg | 17% | 16.4 mg | 20% |
| Potassium | 237 mg | 8% | 284 mg | 9% |
| Vitamin K | 7.9 µg | 8% | 9.48 µg | 9% |
| Copper | 0.06 mg | 7% | 0.07 mg | 8% |
| Manganese | 0.11 mg | 6% | 0.14 mg | 7% |
| Vitamin B6 | 0.08 mg | 6% | 0.1 mg | 7% |
| Vitamin A | 42 µg | 5% | 50.4 µg | 6% |
Typical portion: 1 medium tomato, 120 g, about 22 kcal. % daily value is for a reference adult (average of men and women); "limit" marks a daily limit, not a target. "High" starts at 20% per 100 g.
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Calories from a photoThese are general estimates generated from published formulas, not a medical prescription. Not reviewed by a doctor or registered dietitian.
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Every number on this page (calorie targets, macro splits and any suggested meal plan) is produced by formulas (Mifflin-St Jeor for basal metabolic rate, standard activity multipliers) or, for AI-generated meal plans, by a language model applying those same formulas. On meal-plan pages the carbohydrate figure for each meal is calculated by difference: total calories minus protein and fat calories, divided by 4. It is not measured or estimated on its own, so read it as an arithmetic balance and not as an independent nutritional analysis of the dish. None of it is individualized medical or nutritional advice, and none of it has been reviewed by a registered dietitian, physician or other licensed healthcare professional.
Ask your doctor or a registered dietitian what is right for you before starting a new diet, especially if you are pregnant or breastfeeding, have a diagnosed medical condition, take prescription medication, or have a history of disordered eating. If you have kidney disease or another medical condition, ask your clinician before raising protein.
Mealyno never recommends a calorie target below your calculated Basal Metabolic Rate (BMR), the minimum energy your body needs at complete rest. Even the most aggressive weight-loss setting is clamped at that floor.
Calorie and BMR estimates use the Mifflin-St Jeor equation (Mifflin MD, St Jeor ST, et al. Am J Clin Nutr. 1990).
Generated: October 2026
Also searched as: tomatoes, fresh tomato.
About this food: Tomato
The entry here is a ripe red tomato, raw, and the 18 kcal per 100 g belong to that fresh fruit. A medium tomato of 120 g is 22 kcal, so slicing one into a salad barely moves your day. Cherry tomatoes and the big pink varieties are close enough in numbers, so weigh whichever you have rather than looking for a separate entry.
Tomato changes a lot when it is processed, and this is where logging goes wrong. Tomato paste is concentrated, so a spoonful holds the equivalent of several tomatoes. Sun-dried tomatoes in oil are much denser still. Canned tomatoes in their own juice stay close to fresh, but passata and ketchup often carry added sugar and salt. Check the label rather than reusing the fresh figure.
In a Ukrainian kitchen the tomato mostly meets cucumber, onion, herbs and sunflower oil. The oil is what counts: a tablespoon adds several times more energy than a whole tomato does. Pickled tomatoes from a jar are another common winter food, and the brine usually contains sugar and salt, so they need their own entry.
Keep ripe tomatoes at room temperature, since the fridge dulls flavour and can make the flesh mealy. Unripe ones ripen in a paper bag on the counter within a few days. Use cut tomatoes the same day or keep them covered in the fridge.
What it is high and low in
No nutrient in 100 g of tomato reaches 20% of the daily reference, but it is a good source of vitamin C (17%).
It is low in calories (up to 40 kcal per 100 g), carbohydrate (up to 5 g per 100 g) and fat (up to 3 g per 100 g). The rule is the same for every food: "high" means at least 20% of the daily reference in 100 g, "good source" means 10-19%. For protein it takes at least 8 g per 100 g and a fifth of the calories from protein.
How it compares with similar foods
We compared tomato with the five foods in our table that are closest in composition (Radish, Cucumber, Romaine lettuce, Zucchini and Celery stalks), per 100 g.
Rank among the six: Protein (1 = most): 3rd of 6; Calories (1 = fewest): 6th of 6; Fibre (1 = most): 4th of 6; Carbohydrate (1 = fewest): 6th of 6. The order is computed from the USDA values, so it moves if the table changes.
| Food | kcal | protein | fat | carbs | fibre |
|---|---|---|---|---|---|
| Tomato | 18 | 0.9 | 0.2 | 3.9 | 1.2 |
| Radish | 16 | 0.7 | 0.1 | 3.4 | 1.6 |
| Cucumber | 15 | 0.7 | 0.1 | 3.6 | 0.5 |
| Romaine lettuce | 17 | 1.2 | 0.3 | 3.3 | 2.1 |
| Zucchini | 17 | 1.2 | 0.3 | 3.1 | 1 |
| Celery stalks | 14 | 0.7 | 0.2 | 3 | 1.6 |
All values per 100 g.
Where the numbers come from
The values on this page come from USDA FoodData Central, SR Legacy (entry 170457: "Tomatoes, red, ripe, raw, year round average"). It is the US government's reference database and its data is public domain (CC0). We retrieved it on October 4, 2026 and show it per 100 g of the food in the stated state (fresh). When USDA reports no value for a vitamin or mineral we write "no data", never zero.
The daily value column compares each amount with a reference adult: the average of the adult male and female values in the US and Canada Dietary Reference Intakes (age 19-30), a 2,000 kcal day and 50 g of protein. Sodium (2300 mg), sugar (90 g of total sugars, the EU reference intake) and saturated fat (22 g, under 10% of calories) are limits, not targets. These are general guides for healthy adults, not medical advice.
The portion weight is a typical size, not a USDA value, so weigh your own portion.
Calorie and nutrient questions
How many calories are in 100 g of tomato?
18 kcal per 100 g, with 0.9 g protein, 0.2 g fat and 3.9 g carbohydrate. A typical portion (1 medium tomato, 120 g) has about 22 kcal.
How much protein is in tomato?
100 g has 0.9 g of protein, which is 2% of a 50 g daily reference, and a typical portion (120 g) has 1.1 g. Protein supplies 17% of its calories.
Which vitamins and minerals does tomato contain?
The most per 100 g, as a share of the daily reference: vitamin C 13.7 mg (17%). Every other tracked vitamin or mineral is under 10% or has no USDA value.