All Tools
Five interactive calculators to model compound growth, retirement timelines, passive income, and crypto scenarios — free, no signup required.
Written by Mike Starr
Founder, StackedTomorrow · M.S. Organizational Management
Last Reviewed: August 2026
Educational Content Only. All content on this page is provided for informational and educational purposes only. It does not constitute financial, investment, legal, tax, or retirement advice. The calculators and projections shown are illustrative models — not predictions or guarantees of future performance. Past performance does not guarantee future results. Always consult a qualified financial professional before making investment or retirement decisions.
Each simulator below uses standard financial formulas — compound interest, safe withdrawal rate methodology, and historical market return assumptions — to model realistic long-term outcomes based on the inputs you provide. Results are hypothetical projections, not guarantees. All tools are designed for educational exploration to help you understand how variables like time horizon, contribution amount, and return rate interact.
Weekly Investment Calculator
For anyone building wealth through regular contributions.
Model what happens when you invest a fixed amount every week. Adjust your weekly contribution, expected annual return, and time horizon to see how compound growth turns consistent small amounts into serious wealth. Paired with our guide on Dollar Cost Averaging.
Millionaire Timeline Calculator
For those with a long-term wealth-building goal.
Enter your starting balance, monthly contributions, and target return rate to see exactly when your portfolio crosses $1M — and how much faster you get there by increasing contributions or starting earlier. Learn the underlying math in our Compound Interest guide.
Passive Income Calculator
For anyone modeling income from investments.
Work backward from a target monthly income to find the portfolio size you need. Uses the 4% safe withdrawal rate methodology — the same principle underlying most FIRE strategies. See our Passive Income guide for the full framework. Key term: Withdrawal Rate.
FIRE / Early Retirement Calculator
For those planning financial independence.
Input your annual expenses, current savings, monthly contributions, and expected return to project your FIRE number and target retirement date. Adjust your savings rate to see its outsized impact on your timeline. Read What Is FIRE? for a complete explanation of the underlying concepts.
Crypto Scenario Simulator
For investors modeling speculative allocations.
Select from major crypto assets, enter your holdings, and model hypothetical price targets to see potential portfolio value under different scenarios. This tool is for educational exploration only — not a price prediction. See our Crypto page for context on position sizing and risk.
For deeper explanations of the concepts behind these tools, visit our Educational Guides or the Financial Glossary.
Dedicated Calculator Guides
Watch consistency become wealth. Small weekly amounts create massive long-term outcomes.
Simulation Mode
Strong foundation — compounding will accelerate this dramatically.
Most wealth growth happens in the final years — compounding accelerates dramatically the longer you stay invested. Consistency beats timing every time.
Emergency fund secured — compounding begins in earnest.
Explore Another Future
Every scenario you model reveals a new possibility.