How this calculator works
How does this calculator work out what an investment would be worth?
It divides your investment amount by the stock's closing price on the first trading day of the month you pick, then multiplies those shares by the most recent monthly closing price. All prices are split-adjusted, so stock splits are fully accounted for.
What data does the calculator use?
Split-adjusted monthly closing prices from Yahoo Finance for 173 companies, index funds, and cryptocurrencies. The S&P 500 comparison uses the SPDR S&P 500 ETF (SPY), which has tracked the index since January 1993.
How current are the numbers?
The price data is refreshed monthly. Every result reflects the most recent monthly close at the time of the last refresh, not a live market price.
Does it include dividends?
No. Results are price returns only and exclude dividends, taxes, trading fees, and inflation, so a real after-tax result would differ. The methodology page covers the full calculation details. Read the methodology
Put this calculator on your site
One line of HTML embeds the full calculator, free. It arrives with a small attribution link and the same not-financial-advice footing you see here. Works on any site that allows script embeds.
<script src="https://www.whatifyouinvested.com/embed.js" async></script>
Prefer a fixed height? Add data-height="800" to the script tag. Questions or a custom need: use the contact page.
Exploring other financial tools? Try the Bitcoin investment calculator at Bitcoin Verdict, the opportunity cost calculator at Campus ROI, or Startup Cost Guide if you are weighing business ownership against investing.