A Western Scale is quite different from an Indian Raga. Scale is about Notes, Raga is a lot more than just its notes. Raga is about the order in which you play the notes, the rules of how to play them, the relative position with respect to fundamental frequency and so on. See the difference between Western Scales and Indian Ragas.
Western Scale equivalent of Indian Ragas
Assuming that you have understood the difference between Scale and a Raga, below is a basic mapping of Indian Raga or Raag in Carnatic and Hindustani system to the nearest Western Scale.