Before deciding on which country or city you want to move to or to get an idea of what the costs are and how you have to budget for your living expenses, it is good to find out more about the cost of living.
Numbeo is a useful tool which helps you compare the cost of living in any city with the city of your next destination. It also offers options to compare crime, traffic, and quality of life.
Expatistan is a cost of living calculator that allows you to compare the cost of living between cities around the world. The comparisons allow you to get a better understanding of the cost of living of any city before you move there.
Nomadlist provides information about the best cities to live in if you work remotely and are not dependent on location to make money. Per city, it will show you not only the costs but also the quality of internet connections, info about safety and many more things.