Tomato: calories and nutrition facts
Calories in tomato per 100 g and per typical portion, from the MacroLab food catalog.
18kcal per 100 g
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To burn these 18 calories:
- 4minWalking (5 km/h)
- 2minRunning (8 km/h)
- 2minCycling (16–19 km/h)
- 2minSwimming
Times use the MET equation for a 70 kg adult. Actual burn varies with your weight, age and pace.
Calories per portion
Common portions from the MacroLab catalog, next to the 100 g reference.
| Portion | kcal |
|---|---|
| 100 g | 18 |
| 1 piece (120 g) | 22 |
Can tomato make you gain weight?
At 18 kcal per 100 g, this is a food with very low energy density: it takes about 556 g to reach 100 kcal.
One piece (120 g) has only 22 kcal, which is easy to fit into most days.
No single food makes you gain weight. What matters is your total calories over days and weeks compared with what you burn.
Tomato vs other foods in “Vegetables”
It has 53% fewer calories than the average food in “Vegetables” (39 kcal per 100 g).
| Per 100 g | This food | Group average |
|---|---|---|
| Energy | 18 kcal | 39 kcal |
Related foods
Frequently asked questions
- How many calories are in 100 g of tomato?
- 100 g has 18 kcal. That means about 556 g for every 100 kcal.
- How many calories are in one piece of tomato?
- One piece (120 g) has 22 kcal.
Log tomato with a photo in MacroLab
Snap your plate and MacroLab estimates calories and macros, then keeps your daily targets up to date.
Data from the MacroLab food catalog, updated September 26, 2026. Values vary by variety and brand; check the label of the product you buy.