Estimate how much your 401(k) could be worth at retirement with this detailed calculator. Enter your age, retirement age, salary, current balance, contributions, employer match, expected return, fees and inflation. Explore year-by-year growth, 2026 IRS contribution limits, average balances by age, Traditional vs Roth options, vesting rules, early withdrawals and the Rule of 55. https://financenovels.com/finance-tools/401k-calculator/