Cost of living in Ithaca, New York (United States) is 101% more expensive than in Łódź (Poland)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 347 prices entered by 34 different people.
For example, you would need at least 12,895 zł ($3,460) in Ithaca, New York to maintain the same standard of living that you can have with 6,400 zł in Łódź.