- A Roth IRA calculator estimates what your account could be worth at retirement, based on how much you put in and how long it grows.
- The magic input is time. Money in a Roth IRA grows tax-free, so every year of compounding counts more than the last.
- The number a calculator spits out is an estimate, not a promise. Markets rise and fall, so treat it as a planning tool, not a guarantee.



















