Tomato calories per 100g: 18 kcal

Tomato Nutrition Analysis

Tomatoes are incredibly low in calories, providing roughly 18 calories per 100g, making them a staple in weight-loss and heart-healthy diets around the globe. Despite their extremely low caloric density, tomatoes are packed with water (making up about 95% of their weight), which provides remarkable volume to meals and helps you feel surprisingly full without consuming excess calories. Whether slicing a fresh tomato or preparing a salad, the CalMind photo calorie tracker can instantly provide you with accurate macro data from a single photo.

At an impressive macronutrient breakdown of 3.9g of carbohydrates, 0.2g of fat, and 0.9g of protein per 100g, tomatoes are naturally low-carb and keto-friendly. They are highly praised for being one of the best dietary sources of lycopene, an antioxidant linked to numerous health benefits including reduced risk of heart disease and certain cancers. Interestingly, cooking tomatoes actually increases the bioavailability of lycopene, meaning tomato sauces and pastes offer an even heavier antioxidant punch.

Because they are so low in calories, you can comfortably integrate tomatoes into nearly any diet—whether chopped raw in salads, slow-roasted with a drizzle of olive oil, or blended into savory soups. Using tomatoes as a primary flavor base rather than heavy cream sauces is a brilliant way to slash the caloric footprint of pasta dishes, curries, and stews while elevating the flavor profile.

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