FINANCIAL SIMULATORS

Model your numbers before you commit to them

Four calculators covering compounding, early retirement, Roth IRA growth, and debt payoff — all computed instantly in your browser.

Compound Growth FIRE Estimator Roth IRA Growth Debt Snowball

Compound Growth Calculator

Project how a starting balance and steady monthly contributions grow over time at a given annual return, compounded monthly.

Starting principal ($) Monthly contribution ($) Annual return (%) Time horizon (years)

FINAL BALANCE

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TOTAL CONTRIBUTED

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GROWTH FROM RETURNS

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FIRE Estimator

Estimate the portfolio size needed to cover annual spending at a chosen withdrawal rate, and how long it may take to reach it.

Target annual spending ($) Withdrawal rate (%) Current savings ($) Annual contribution ($) Expected annual return (%)

FIRE NUMBER

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YEARS TO REACH IT

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Roth IRA Growth Calculator

Project how a Roth IRA balance could grow from now until retirement age, based on annual contributions and an assumed return.

Current age Target retirement age Current Roth IRA balance ($) Annual contribution ($) Expected annual return (%)

PROJECTED BALANCE AT RETIREMENT

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Debt Snowball Tool

List your debts with balances and minimum payments. The tool orders them smallest-balance-first and estimates a payoff timeline with any extra monthly amount applied.

Extra monthly amount toward payoff ($)

PAYOFF ORDER (SMALLEST BALANCE FIRST)