Most investment calculators are either too basic to be useful or so cluttered with jargon that beginners give up. Portfolio Calculate was built to fix both, in one tool.
Build a portfolio from any US stock or ETF, test how it would have performed over decades of real prices and dividends, see the income it pays month by month, and project where it could go. The math is one verified engine throughout — dividends and compounding handled properly, not hand-waved.
Every calculation runs in your browser. No account, no signup, nothing uploaded. Your financial plans are yours.
The site may show ads to cover its costs. That never changes the math and we never sell your data — there's nothing to sell, since we don't collect it.
Projections are only as good as their assumptions, and markets never follow averages. That is why the backtester shows real drawdowns and worst years from actual history rather than pretending returns are a smooth curve, and why every concept is explained in plain language on the calculator page. Nothing here is financial advice — it is a tool to help you think clearly.
Feedback or ideas? Get in touch.