A lot of foods tell you on the pack and you can check a database here http://nutritiondata.self.com/ Setting the quantity to 100g allows you to see the percentage of fat, protein and carbs. If you don’t know already carbs and protein are 4 calories per gram and fat is 9 calories per gram.
Like I said, the rest of the calories come from fat. The candida diet is a high-fat, low-carb diet and in some incarnations ketogenic. Most of the foods you get carbs/protein from are high in fat (eggs have 100 fat cals each, Greek yoghurt is 10% fat), and with added coconut oil as an anti-fungal, you shouldn’t struggle for calories.
It sounds complicated, but after a while you get a feel for it. You could try counting calories for a week or so, and then you’ll probably find you don’t need to.