FRUIT · per 100g edible portion
Tomatoes
Nutrition facts for tomatoes (raw) — measured values from USDA FoodData Central, standardized to a 100g basis.
Ranks in 8 of 8 tracked rankings
Energy
18kcal
per 100g
Per 1 slice, medium (1/4" thick) (20 g): 4 kcal · 0.2 g protein · 0.8 g carbs · 0 g fat
Protein
0.9g
Carbs
3.9g
Fiber
1.2g
Fat
0.2g
Macronutrient mix
Share of calories from each macro (Atwater 4/4/9 kcal per g)
In context
Why tomatoes stands out
Where tomatoes sits among the 61 foods in the database, per nutrient — computed from measured values only.
High in
Nothing in the top tier for this food.
Source of
Nothing in the top tier for this food.
Low in
- Calories#60 · 18 kcal
Serving sizes
Household measures
| Measure | Grams | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|---|
| 1 slice, thin/small | 15 g | 3 kcal | 0.1 g | 0.6 g | 0 g |
| 1 cherry | 17 g | 3 kcal | 0.1 g | 0.7 g | 0 g |
| 1 slice, medium (1/4" thick) | 20 g | 4 kcal | 0.2 g | 0.8 g | 0 g |
| 1 slice, thick/large (1/2" thick) | 27 g | 5 kcal | 0.2 g | 1.1 g | 0.1 g |
Measures from USDA food portion data; per-serving values are derived from the measured per-100g values.
Full profile
Nutrition facts per 100g
| Nutrient | Amount |
|---|---|
| Calories | 18 kcal |
| Protein | 0.88 g |
| Carbohydrates | 3.89 g |
| Fiber | 1.2 g |
| Sugar | 2.63 g |
| Fat | 0.2 g |
| Saturated Fat | 0.03 g |
| Calcium | 10 mg |
| Iron | 0.27 mg |
| Magnesium | 11 mg |
| Phosphorus | 24 mg |
| Potassium | 237 mg |
| Sodium | 5 mg |
| Zinc | 0.17 mg |
| Vitamin A | 42 µg |
| Vitamin C | 13.7 mg |
| Vitamin D | 0 µg |
| Vitamin E | 0.54 mg |
| Vitamin K | 7.9 µg |
| Vitamin B1 | 0.04 mg |
| Vitamin B2 | 0.02 mg |
| Vitamin B3 | 0.59 mg |
| Vitamin B6 | 0.08 mg |
| Vitamin B12 | 0 µg |
| Folate | 15 µg |
Common questions
Tomatoes FAQ
How many calories in 1 slice, medium (1/4" thick) of tomatoes?
1 slice, medium (1/4" thick) of tomatoes (20 g) provides about 4 kcal. Per 100 g, tomatoes has 18 kcal.
How much protein in tomatoes?
Tomatoes contains 0.9 g of protein per 100 g — about 0.2 g per 1 slice, medium (1/4" thick) (20 g).
Is tomatoes high in fiber?
Tomatoes has 1.2 g of fiber per 100 g and ranks #40 of 58 tracked foods for fiber.
Explore
Where tomatoes ranks
Food graph
Nutritionally similar to tomatoes
Computed from all 25 tracked nutrient profiles in the database — closest overall composition, not necessarily the same food family.
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Data Provenance
USDA FoodData Central
SR Legacy
- Source
- USDA FoodData Central
- FDC ID
- 170457
- Basis
- 100 g edible portion
- Record type
- SR Legacy
- Retrieved
- September 24, 2026