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Is there a measure that uses both cost of living plus income?
The key term you're looking for is "purchasing power parity", which considers the local prices of goods and services when making comparisons between countries. For example, you can look up the GDP by PPP per capita to get a sense of much people on average incomes can buy in each country. Of course, average incomes may not be too relevant to your own specific circumstances, but nonetheless you can look at the PPP data itself to figure out how to translate specific numbers between two currencies. However, note that the "basket" of goods used to calculate this measure itself has a significant impact on the results. Comparing prices of food and electronic equipment respectively will often give very different answers.