Free investing calculators

Each one answers one money question, using real market history. No sign-up, no ads.

Investment calculator

What could my money grow to?

Pick an amount, a time and a real past average rate. See how it could add up.

The S&P 500 averaged 10.0% a year from 1928 to 2025, with a losing decade in the 2000s.

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Questions people ask

Are these calculators free?

Yes. No sign-up, no ads. Save a plan only if you want to come back to it.

Where do the numbers come from?

Market history from NYU Stern (1928 to 2025), inflation from the US government's CPI, and our own daily prices for stocks and funds. Every page names its sources.

Is my information saved?

Your inputs live in the page's link, so you can share or bookmark a result. Nothing is saved to an account unless you save a plan.