All FourPercent Calculators
This is the cleanest way to browse the whole library. Start with a core FIRE planning tool, jump to a savings or investing calculator, or move straight into advanced retirement stress tests.
FIRE / Early Retirement
These are the calculators most people should start with when they want to estimate a FIRE number, retirement age, or time remaining until financial independence.
FIRE Calculator
Project your portfolio growth and estimate when your investments may support retirement spending.
FIRE Age Calculator
Estimate the age when your current portfolio and ongoing contributions could reach financial independence.
Years to FIRE Calculator
See how many years remain until your portfolio could cover your spending target.
Coast FIRE Calculator
Find out whether your existing portfolio can grow to your retirement target with less or no ongoing saving later on.
Savings Rate Calculator
Measure how much of your income you save and connect it to your pace toward financial independence.
4% Rule Calculator
Turn annual or monthly spending into a rough retirement target and implied withdrawal amount.
Countries Where You Can Retire
Map your FIRE inputs onto countries to see where your retirement timeline may look easier or harder.
Investing / Savings
These pages focus more on compounding, contribution pacing, and reaching specific wealth milestones before or outside retirement planning.
Compound Interest Calculator
Project long-term portfolio growth using a starting balance, monthly contributions, annual return, and time horizon.
Savings Goal Calculator
Estimate how long it could take to hit a target amount with current savings, monthly contributions, and investment growth.
Started Investing Earlier
Compare two start ages and see how much waiting can change the final portfolio at retirement.
Global Index Fund Return Tracker
Use real broad-market return snapshots as a benchmark for your own assumptions.
Live Salary Tracker
Watch annual compensation accumulate in real time and translate it into hourly, monthly, and yearly terms.
Retirement / Withdrawal
Use these when your main question is not only whether you can retire, but how withdrawals and taxes may affect what you can actually spend.
4% Rule Calculator
Translate spending into a rough retirement number and implied annual or monthly withdrawals.
US Taxable Brokerage Withdrawal
Estimate how portfolio withdrawals and capital gains tax can affect monthly after-tax cash flow.
Norway ASK Withdrawal Tax
Model shielding, deposited capital, and estimated tax drag on retirement withdrawals from ASK savings.
Advanced FIRE
These are the stronger traffic and authority pages when you want to stress test a plan instead of looking at a single straight-line projection.
Monte Carlo FIRE Simulator
Run thousands of market paths and estimate how often a retirement plan survives.
Sequence of Returns Risk
Compare identical average returns delivered in different orders and see how early losses can change the result.
Historical FIRE Backtest
Test one spending plan across many historical start years to see how it would have held up.