There's no single magic number — and anyone who gives you one without asking what you spend is guessing. What you need to retire is driven by your annual spending, not your salary or a round figure off a headline. The rough starting point is about 25x your yearly costs (the flip side of the 4% rule), but that's an anchor, not an answer.
This calculator does the honest version: put in your age, what you've saved and when you want to stop, and it works out whether you're on track for the spending you actually have — and what a real drawdown looks like once markets, inflation and timing get involved. Just try it with your own numbers. The gap between "sounds like a lot" and "is it enough" tends to surprise people in both directions.