Cost of living in Boulder, Colorado (United States) is 90% more expensive than in Zonguldak (Turkey)
WARNING! This comparison is based on only a few data points. At this point it is only a guess. It is based on 261 prices entered by 34 different people.
For example, you would need at least 3,994TL ($638) in Boulder, Colorado to maintain the same standard of living that you can have with 2,100TL in Zonguldak.