Editor Rating: 4- Indie travelers can get by on about $30-40USD per day in Calcutta. This isn't a bare-bones budget, but you aren't going to be living it up either. But you could get a private room (for 2), transportation around the city, and eat at least 1 or 2 meals out. If you eat on the streets, this number can go down.
Indie Travel Scale
Editor Rating: 9 - It doesn't get more indie than a huge city in India. Calcutta will challenge you as a traveler, but if you come with an open mind, there is so much to learn, about both India and yourself.