Sixty is a sweet spot for a lot of people — early enough to properly enjoy it, late enough that the numbers are far more forgiving than retiring at 50 or 55. You've usually got a shorter gap to bridge before pensions and state benefits kick in, which takes real pressure off the early years. But "far more forgiving" isn't "automatic", and that's what this checks.
Put in your age, what you've saved and your spending, and see whether 60 works for your numbers — and what the drawdown looks like across a 25-30 year retirement. Try it, then pull the age to 62 or 58 and watch how much the finish line moves; a couple of years either way changes the picture more than most people expect.