Vegetables
Tomato nutrition facts
A 1 undetermined medium whole (2-3/5" dia) (123 g) serving of tomato provides 22 calories, 1 g protein, 5 g carbohydrate, and 0 g fat — about 17% of its calories from protein, 75% from carbohydrate, and 8% from fat. The interactive label below toggles between a serving and 100 g.
Calorie split
| Nutrient | Per 1 undetermined medium whole (2-3/5" dia) (123 g) | Per 100 g |
|---|---|---|
| Calories | 22 | 18 |
| Protein | 1 g | 1 g |
| Total carbohydrate | 5 g | 4 g |
| Total fat | 0 g | 0 g |
Vitamins & minerals
Per serving (123 g)
- Vitamin C
- 16.9 mg
- Vitamin A (RAE)
- 51.7 mcg
- Vitamin E
- 0.66 mg
- Vitamin K
- 9.72 mcg
- Thiamin (B1)
- 0.05 mg
- Riboflavin (B2)
- 0.02 mg
- Niacin (B3)
- 0.73 mg
- Vitamin B6
- 0.10 mg
- Folate (DFE)
- 18.4 mcg
- Magnesium
- 13.5 mg
- Phosphorus
- 29.5 mg
- Zinc
- 0.21 mg
- Copper
- 0.07 mg
- Manganese
- 0.14 mg
Selecting, storing & prepping tomato
- Selecting
- A ripe tomato gives slightly to gentle pressure and has a fragrant smell at the stem.
- Storing
- Keep at room temperature, away from direct sun, until ripe — refrigeration below about 55°F dulls flavor and can turn the flesh mealy. Once cut, refrigerate and use within 2–3 days.
- Prepping
- If a recipe calls for peeled tomatoes, a quick dip in boiling water for 30–60 seconds loosens the skin for easy peeling.
Storage guidance from the USDA FoodKeeper database (FSIS, Cornell University, and the Food Marketing Institute).
Nutrition highlights
Per 1 undetermined medium whole (2-3/5" dia) (123 g), tomato is a good source of Vitamin C.
% of the FDA Daily Value per 1 undetermined medium whole (2-3/5" dia) (123 g) serving.
Key metrics
Nutrient density
Per 100 kcal, tomato delivers about 16% of a Daily Value on average across 22 beneficial nutrients. The score is its percentile for that measure among the 177 foods in our database — higher means more nutrition per calorie. How this is calculated.
- More vitamin C than 85% of foods · 62% of vegetables
Density counts protein, fiber, and vitamins and minerals (not fat, sodium, or sugar), each capped so a single nutrient can’t dominate, with a calorie floor so very-low-calorie foods aren’t overstated. It measures nutrition per calorie within our database — a useful guide, not a complete verdict on how “healthy” a food is.
Similar foods & swaps
The closest vegetables to tomato by nutrition (per 100 g), and how each differs.
Questions
- How many calories are in tomato?
- A 1 undetermined medium whole (2-3/5" dia) (123 g) serving of tomato has about 22 calories. Per 100 g, it has 18 calories — a very low calorie density.
- How much protein is in tomato?
- Tomato provides about 1 g of protein per 1 undetermined medium whole (2-3/5" dia) (123 g) serving.
- What are the macros in tomato?
- Per serving, tomato has roughly 1 g protein, 5 g carbohydrate, and 0 g fat. By calories, that is 17% protein, 75% carbohydrate, and 8% fat.
- Is tomato high in protein?
- Tomato has a protein density of about 4.9 g per 100 kcal, and 17% of its calories come from protein. Foods above roughly 10 g per 100 kcal are generally considered protein-dense.
- What vitamins and minerals are in tomato?
- Per 1 undetermined medium whole (2-3/5" dia) (123 g), tomato is a notable source of Vitamin C. The label above lists the full micronutrient profile with % Daily Values.
- What is the nutritional value of tomato?
- Per 1 undetermined medium whole (2-3/5" dia) (123 g), tomato has 22 calories, 1 g protein, 5 g carbohydrate, and 0 g fat, plus notable amounts of Vitamin C. See the full nutrition facts label above for every vitamin and mineral.
Use it
More vegetables
References & methodology
- Data source: U.S. Department of Agriculture, Agricultural Research Service — FoodData Central, FDC ID 170457 (public domain).
- Daily Values: FDA Nutrition Facts label, 2016 update (adults and children aged 4+).
- Source claims: a serving supplying 10–19% of the Daily Value is a “good source”; 20% or more is an “excellent source” (FDA, 21 CFR 101.54).
- Calorie split: Atwater general factors — 4 kcal/g for protein and carbohydrate, 9 kcal/g for fat.
- Last reviewed: June 2026. Values are typical figures and vary with variety, ripeness, and preparation.
NutriFactsHub. “Tomato Nutrition Facts.” https://nutrifactshub.com/foods/tomato