Cost of living in Kalisz (Poland) is 10% cheaper than in Aguadilla (Puerto Rico)
WARNING! This comparison is based on only a few data points. At this point it is only a guess. It is based on 92 prices entered by 16 different people.
For example, to keep the same standard of living that would require $2,700 in Aguadilla you would need to make just about $2,439 (9,070 zł) in Kalisz.