ELKa system is an advanced toolset which helps performing calculation of carbohydrate (CHO) and fat/protein (FP) exchanges. It consists of ELKa software including database of various meals and nutrients and ELKaPlus digital kitchen scale transmitting weight of products in a real-time to a computer via universal serial bus (USB) port. After choosing the name of particular product from the list, the program gives precise information about the amount of CHO and FP exchanges in serving.