Ricotta is higher in carbs compared to other cheeses like mozzarella or parmesan. But, it can be eaten in moderation when on a low-carb or keto diet. A fourth cup of full-fat ricotta cheese contains 4.5 net carbs or less. Full-fat ricotta cheese tends to be lower in carbs than part-skim ricotta cheese. Be aware that the carbs in ricotta cheese can vary greatly by brand, so it's best to compare the carbs in different brands before purchasing.