What a salary is worth depends entirely on where you spend it. These city guides break down realistic monthly budgets for rent, food, transport and utilities, so you can compare places on what is left over rather than on headline pay.
Compare cities on what is left after the essentials, not on rent alone — a higher rent in a city with short commutes often beats a cheaper suburb once transport and time are counted. Rent and food dominate every one of these budgets, so those two lines decide the outcome.
Treat the figures as a starting point for a single person living reasonably, then adjust the rent line to the locality you are actually considering; within one city it varies more than between two cities.
Model your own version with the budget calculator.