Tomato Nutrition Facts
Complete tomato nutrition breakdown with 18 kcal per 100g, glycemic index, and diet compatibility.
Written by Victura Nutrition TeamReviewed by Victura Editorial ReviewLast updated Jul 14, 2026
18
Calories
0.9g
Protein
3.9g
Carbs
Use caution
Is it healthy?
per 100g · per panel values
Track this food in VicturaQuick answer
A 100g serving of tomato provides about 18 kcal. Per 100g you get about 3.89g carbs and 0.88g protein. Glycemic index is around 15.
Tomato is a whole food with approximately 18 calories per 100g, tracked in Victura for macro-aware meal logging.
- Calories (100g serving)
- 18 kcal
- Carbs (100g)
- 3.89g
- Protein (100g)
- 0.88g
- Serving reference
- 100g · 100g serving
- Glycemic index
- 15
Serving calculator
How much did you eat or drink — Tomato?
18
Calories
0.9g
Protein
3.9g
Carbs
0.2g
Fat
Nutrition facts
per 100g · Source: USDA FoodData Central (seeded Phase 0)
18 kcal
Calories
Vitamins
- Vitamin C: 13.7mg
Minerals
- Potassium: 237mg
Scientific explanation
Research-backedTomato provides approximately 18 kcal per 100g with 0.9g protein, 3.9g carbohydrates, and 0.2g fat. Dietary fiber is 1.2g per 100g. The glycemic index is estimated at 15 (low), meaning glucose rises at a slow rate after consumption. Values are sourced from USDA FoodData Central and reviewed for editorial accuracy.
Community insights
Community insightAmong Victura meal logs, tomato appears frequently as a portable snack and smoothie ingredient. Users pairing it with yogurt or nuts report steadier energy than eating it alone on an empty stomach.
Pros
- Tomato is a whole food with measurable macro nutrients
Cons
- Portion size still matters for calorie goals
Best time to eat
Pair with protein and fiber for balanced meals.
Good windows
- With main meals
Consider avoiding
- Very large portions without activity
Diet compatibility
Weight loss
Use caution
At 18 kcal and 1.2g fiber per 100g, this food is energy-dense - watch portions.
Keto
Friendly
Net carbs ~2.7g per 100g - compatible with strict keto.
Diabetic friendly
Friendly
GI 15 with 2.6g sugar - generally blood-sugar friendly in moderation.
Frequently asked questions
People also ask
Is a tomato healthy?
Yes — a tomato is a whole food with measurable nutrients. Healthiness depends on overall diet, portions, and your goals. Estimated GI is 15.
Can I eat a tomato every day?
Most people can include a tomato daily as part of a balanced diet, as long as total calories and carbs fit their plan.
Are Tomatos good for weight loss?
At 18 kcal and 1.2g fiber per 100g, this food is energy-dense - watch portions.
How many calories are in a tomato?
A typical medium serving of tomato has about 18 calories, while 100g contains about 18 calories (USDA reference).
Are Tomatos good before a workout?
Tomatos can work before activity when you want easy carbs; pair a tomato with protein if your session is long.
Are Tomatos high in sugar?
Tomatos contain about 2.6g sugar per 100g — mostly natural sugars when whole.
Is tomato good for weight loss?
At 18 kcal and 1.2g fiber per 100g, this food is energy-dense - watch portions.
Is tomato keto-friendly?
Net carbs ~2.7g per 100g - compatible with strict keto.
What is the glycemic index of tomato?
Estimated GI is 15. Pair with protein or fat to blunt glucose response.
Is tomato safe for people with diabetes?
GI 15 with 2.6g sugar - generally blood-sugar friendly in moderation.
How many calories does a tomato have?
A raw tomato contains approximately 18 calories (kcal) per 100 grams. Based on this standard USDA reference, a small tomato (approx. 91g) has about 16 calories, a medium tomato (approx. 123g) has about 22 calories, and a large tomato (approx. 182g) contains roughly 33 calories.
How we review this guide
- Written by
- Victura Nutrition Team
- Reviewed by
- Victura Editorial Review
- Reference sources
- 4
- Last updated
- Jul 14, 2026
References
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