Cost of living in Tartu (Estonia) is 43% cheaper than in Adelaide (Australia)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 1,089 prices entered by 115 different people.
For example, to keep the same standard of living that would require AU$8,000 in Adelaide you would need to make just about AU$4,552 (€2,949) in Tartu.