A one-tablespoon serving of ketchup contains 15 calories and 4.1 grams of carbohydrate. It provides almost no protein or fat but does contain sugar.| Verywell Fit
One small tomato (91g) provides 67 calories, 0.8g of protein, 3.5g of carbohydrates, and 0.2g of fat. Tomatoes are an excellent source of vitamin C, fiber, and vitamin K.| Verywell Fit