Just looking at Germany: the salary calculator assumes everything outside a select few cities is costing the same. I sincerely hope they don't use that calculator to make the actual calculations for candidates but spend the effort to calculate an actual number for the location, otherwise that's entire areas that are just laughably inaccurate. E.g. Stuttgart, according to some numbers the city with the second-highest average rent in the country is not in a special case and thus assumed to be in the cheapest class. Let's estimate CoL 30 % higher than Berlin, 10 % less compensation.