Quick Answer: 100g tomato nutrition comes to just 18 calories, 3.9g of carbs, 1.2g of fiber, and 0.9g of protein, with about 15% of the daily value for vitamin C. Tomatoes are about 95% water. 100g is a little less than one medium tomato, or about 6 cherry tomatoes. Use the calculator below to check any amount.
🍅 Tomato Nutrition Calculator
Based on USDA values for raw red tomatoes.
100g Tomato Nutrition Facts
| Nutrient | Per 100g Raw | % Daily Value |
|---|---|---|
| Calories | 18 kcal | 1% |
| Water | ~95g | – |
| Carbohydrates | 3.9g | 1% |
| Fiber | 1.2g | 4% |
| Sugar | 2.6g | – |
| Protein | 0.9g | 2% |
| Fat | 0.2g | 0% |
| Vitamin C | 13.7mg | 15% |
| Potassium | 237mg | 5% |
| Vitamin K | 7.9mcg | 7% |
Keep reading for what 100g of tomato looks like, why tomatoes are known for lycopene, and how cooking changes their nutrition.
How Much Tomato Is 100g?
| Tomato Type | Average Weight | Amount in 100g |
|---|---|---|
| Medium round tomato | ~123g | About ⅘ of one |
| Roma (plum) tomato | ~62g | About 1½ |
| Cherry tomato | ~17g | About 6 |
| Chopped tomato | ~180g per cup | Just over ½ cup |
Lycopene and Cooking Tomatoes
Tomatoes are the best-known source of lycopene, the red pigment that gives them their color. 100g of raw tomato has about 2.6mg. Cooking breaks down the tomato's cell walls and concentrates it, so tomato sauce, paste, and soup provide more lycopene per serving than fresh tomatoes, and eating them with a little fat helps the body absorb it. Fresh tomatoes, on the other hand, keep more of their vitamin C, which is sensitive to heat. Carrots are another everyday source of carotenoids, as covered in how much is 100g of carrots.
Tomatoes in a Balanced Plate
At 18 calories per 100g, tomatoes add color, flavor, and volume without many calories. They pair naturally with other water-rich vegetables, such as cucumber at 15 calories per 100g, and with crunchy, sweeter carrots. Because they're low in carbohydrates, they fit easily into low carb side dishes and calorie-controlled plans like our 1500 calorie meal plan.
Frequently Asked Questions
About 18 calories, with 3.9g of carbohydrates, 1.2g of fiber, and 0.9g of protein.
A little less than one medium tomato, about 1½ Roma tomatoes, or about 6 cherry tomatoes.
About 13.7mg, roughly 15% of the daily value.
Each has advantages. Cooked tomatoes provide more lycopene, while raw tomatoes keep more vitamin C.
Final Answer: 100g Tomato Nutrition
100g of tomato has just 18 calories, 3.9g of carbs, 1.2g of fiber, and about 15% of the daily value for vitamin C. That's a little less than one medium tomato or about 6 cherry tomatoes. Eat them raw for vitamin C and cooked for more lycopene, and they'll add flavor and nutrition to almost any meal.