Which calculator do you need?
Start with the plan terms: the 401(k) employer match calculator shows what your match is worth today and at retirement — a 50% match adds fifty employer cents per matched employee dollar and a 100% match adds one employer dollar, subject to your plan’s eligibility and vesting rules.
Then pick the account: Roth vs. Traditional compares after-tax value at retirement, driven in this simplified model by your tax rate now versus later. With equal modeled rates and otherwise identical assumptions, the two produce the same after-tax result.
Then aim: the FIRE number calculator turns your spending in today’s dollars into a target portfolio with an adjustable withdrawal rate (4%, 3.5%, 3%…), shows your progress, and estimates the years to get there using a real return after inflation. Pair it with the compound interest calculator to see the path, and the inflation calculator to keep the target in today’s dollars.