Easy to use Nutrition Calculator. Protein, Fat and Carbs - Carbculator! Carbculator is a very simple nutrition diary and calories counter. With Carbculator you create your own food list and have quick access to it, while fill new eating. Spend 10 minutes and fill food list with products, that you eat more often. Note, you can add whole meals, just calculate total food-value. Or simply select products from the USDA database.